CN113125109A

CN113125109A - Image exposure time measuring system and target device

Info

Publication number: CN113125109A
Application number: CN201911391338.3A
Authority: CN
Inventors: 梁煜彬; 于超
Original assignee: Momenta Suzhou Technology Co Ltd
Current assignee: Momenta Suzhou Technology Co Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2021-07-16
Anticipated expiration: 2039-12-30
Also published as: CN113125109B

Abstract

The embodiment of the invention discloses an image exposure time measuring system and a target device, wherein the system comprises: the method comprises the steps that a first controller receives and analyzes data information sent by a preset time source to obtain time information; after receiving a time reference signal corresponding to data information sent by a preset time source, adding a preset number of seconds to a preset time information part of the time information to obtain time information to be displayed, and sending the time information to a first display module for displaying; after receiving the time reference signal, the digital logic module performs preset reset operation on the first light-emitting module and controls the first light-emitting module to emit light according to a preset light-emitting rule; when the target equipment is determined to work, the first processor controls the image acquisition equipment to acquire the verification reference image for the target equipment, and the exposure time of the verification reference image is determined based on the time information to be displayed, displayed by the first display module, in the verification reference image and the light-emitting unit in the first light-emitting module in the light-emitting state, so that the exposure time of the image is obtained.

Description

Image exposure time measuring system and target device

Technical Field

The invention relates to the technical field of data processing, in particular to an image exposure time measuring system and a target device.

Background

With the development of science and technology, the application of image acquisition equipment is more and more extensive. For example, in the monitoring field, the detection field, the automatic driving field and the like, the image acquired by the image acquisition equipment can provide data support for specific analysis. In practical applications, not only images are used, but also the time of associating each image to the real world is needed to perform multi-dimensional decision operation.

At present, after an image is captured by an image capturing device, a processor built in or externally connected to the image capturing device may timestamp the captured image based on a preset timestamp marking mode. In order to ensure the accuracy of the subsequent multi-dimensional decision operation by using the image acquired by the image acquisition device, it is important to ensure that the processor is accurate enough for the image timestamp of the image marker.

In view of this, how to accurately obtain the true exposure time of the image, and thus, using the obtained true exposure time of the image, it is important to verify the accuracy of the image timestamp of the image mark by the processor.

Disclosure of Invention

The invention provides an image exposure time measuring system and a target device, which are used for realizing the acquisition of image exposure time and further providing a basis for verifying the accuracy of an image time stamp of an image mark by a processor. The specific technical scheme is as follows:

in a first aspect, an embodiment of the present invention provides an image exposure time measurement system, where the system includes: the system comprises image acquisition equipment, a first processor and target equipment, wherein the first processor and the target equipment are provided with time by the same type of preset time source; the target device includes: the device comprises a first controller, a digital logic module, a first display module and a first light-emitting module; the preset time source sends data information to the first controller and sends time reference signals to the first controller and the digital logic module;

the first controller receives and analyzes the data information sent by the preset time source to obtain the time information carried by the data information; after receiving a time reference signal corresponding to the data information sent by the preset time source, adding a preset number of seconds to a preset time information part of the time information to obtain time information to be displayed, and sending the time information to the first display module, wherein the first display module displays the time information to be displayed;

the digital logic module performs preset reset operation on the first light-emitting module after receiving the time reference signal, and controls the reset first light-emitting module to emit light according to a preset light-emitting rule;

the first processor controls the image acquisition device to acquire an image for the target device when the target device is determined to be in the working state, so as to obtain a verification reference image, and is used for determining the exposure time of the verification reference image based on the time information to be displayed, displayed by the first display module, in the verification reference image and the light-emitting unit in the first light-emitting module, which is in the light-emitting state.

Optionally, the image exposure time measuring system further includes a second processor and a second display module;

the first processor determines and marks an image time stamp of the verification reference image based on a preset time stamp determination mode after controlling the image acquisition equipment to acquire an image aiming at the target equipment to obtain the verification reference image; and sending the verification reference image with the image time stamp to the second processor;

and the second processor controls the second display module to display the verification reference image and the marked image time stamp thereof, so that a worker can determine the accuracy of the image time stamp according to the verification reference image.

Optionally, the image exposure time measuring system further includes a third processor;

the first processor determines and marks an image time stamp of the verification reference image based on a preset time stamp determination mode after controlling the image acquisition equipment to acquire an image aiming at the target equipment to obtain the verification reference image; sending the image-time-stamped verification reference image to the third processor;

the third processor is used for identifying the verification reference image, and determining to-be-displayed time information displayed by the first display module in the verification reference image and a light-emitting unit in a light-emitting state in the first light-emitting module;

determining the exposure time of the verification reference image based on the time information to be displayed, displayed by the first display module, in the verification reference image and the light-emitting unit in the first light-emitting module in a light-emitting state;

and comparing the exposure time with the image time stamp to determine the accuracy of the image time stamp.

Optionally, the target device further includes a decoder with a latch;

and the first controller adds a preset second number at a preset time information part of the time information to obtain time information to be displayed, and then sends the time information to be displayed to the first display module through the decoder with the latch.

Optionally, the digital logic module includes: the circuit comprises a first clock generator, a reset circuit, a shift register and a first buffer;

after receiving the time reference signal, the reset circuit resets the shift register and aligns the first clock generator with the reset shift register; and the reset first position of the shift register is 1; and inputting a first clock signal to the reset shift register at the initial position 1 by the aligned first clock generator at a preset frequency, so that the reset shift register at the initial position 1 controls the light-emitting unit in the first light-emitting module to jump through the first buffer.

Optionally, the preset time information part is: second-level precision and above of the time information;

the first implementation mode comprises the following steps: the shift register comprises a shift register of hundred milliseconds, and the first light-emitting module comprises a first light-emitting unit corresponding to the shift register of hundred milliseconds; the first clock generator inputs a first clock signal to the shift register of hundred milliseconds after the reset and initial position 1 at a first frequency;

when the shift register with the hundred milliseconds after the head combination position 1 is reset, controlling the LED lamps in the first light-emitting unit to jump one right through the first buffer when a first clock signal is obtained;

the second implementation mode comprises the following steps:

the shift register includes a hundred millisecond shift register and a ten millisecond shift register, and the first light emitting module includes: a first light emitting unit corresponding to the hundred millisecond shift register and a second light emitting unit corresponding to the ten millisecond shift register; the first clock generator inputs a first clock signal to the shift register of ten milliseconds after the reset and initial position 1 at a second frequency;

correspondingly, after the ten-millisecond shift register is reset and starts at the position 1, when a first clock signal is obtained, the LED lamps in the second light-emitting unit are controlled to jump one right through the first buffer; after the ten-millisecond shift register after resetting and initial position 1 controls the LED lamps in the second light-emitting unit to jump ten times in sequence through the first buffer, the hundred-millisecond shift register after resetting and initial position 1 controls the LED lamps in the first light-emitting unit to jump one right through the first buffer;

the third implementation mode comprises the following steps:

the shift register includes a hundred millisecond shift register, a ten millisecond shift register and a millisecond shift register, and the first light emitting module includes: a first light-emitting unit corresponding to the hundred millisecond shift register, a second light-emitting unit corresponding to the ten millisecond shift register, and a third light-emitting unit corresponding to the millisecond shift register; the first clock generator inputs a first clock signal to the millisecond-level shift register after the reset start position 1 at a third frequency;

correspondingly, after the millisecond-level shift register is reset and the head position is 1, when a first clock signal is obtained, the LED lamp in the third light-emitting unit is controlled to jump to the right by one through the first buffer; after the millisecond-level shift register after resetting and initial position 1 controls the LED lamps in the third light-emitting unit to jump ten times in sequence through the first buffer, the ten millisecond-level shift register after resetting and initial position 1 controls the LED lamps in the second light-emitting unit to jump one right through the first buffer; after the ten-millisecond shift register after resetting and initial position 1 controls the LED lamp in the second light-emitting unit to jump ten times in sequence through the first buffer, the hundred-millisecond shift register after resetting and initial position 1 controls the LED lamp in the first light-emitting unit to jump one right through the first buffer.

Optionally, the target device further includes: a third display module; the third display module is connected with the first buffer through an encoder;

and the third display module is used for displaying the times of the hundred millisecond shift register controlling the LED lamp in the first light-emitting unit to jump to the right through the first buffer.

Optionally, the target device further includes: the second clock generator, the second controller, the second buffer, the decoder and the second light-emitting module; the second clock generator sends a second clock signal to the second controller at a fourth frequency;

the second controller resets the light emitting unit array in the second light emitting module through the second buffer and the decoder after receiving the time reference signal; after a second clock signal sent by the second clock generator is obtained, the light-emitting unit array in the second light-emitting module is controlled to jump to emit light according to a preset jump rule through the second buffer and the decoder; wherein, the preset jump rule is as follows: from left to right and from top to bottom, the hopping frequency of the light emitting unit array in the second light emitting module is higher than the hopping frequency of the light emitting units in the first light emitting module.

In a second aspect, an embodiment of the present invention provides a target apparatus, where the target apparatus includes: the device comprises a first controller, a digital logic module, a first display module and a first light-emitting module;

the first controller obtains and analyzes data information sent by a preset time source to obtain time information carried by the data information; after receiving a time reference signal corresponding to the data information sent by the preset time source, adding a preset number of seconds to a preset time information part of the time information to obtain time information to be displayed, and sending the time information to the first display module, wherein the first display module displays the time information to be displayed;

and the digital logic module performs preset reset operation on the first light-emitting module after receiving the time reference signal and controls the reset first light-emitting module to emit light according to a preset light-emitting rule.

Optionally, the target device further includes a decoder with a latch;

the second implementation mode comprises the following steps:

the third implementation mode comprises the following steps:

As can be seen from the above, an image exposure time measurement system and a reticle device provided in an embodiment of the present invention include: the system comprises image acquisition equipment, a first processor and target equipment, wherein the image acquisition equipment and the target equipment are provided with time by the same type of preset time source; the target device includes: the device comprises a first controller, a digital logic module, a first display module and a first light-emitting module; the preset time source sends data information to the first controller and sends time reference signals to the first controller and the digital logic module; the first controller receives and analyzes the data information sent by the preset time source to obtain the time information carried by the data information; after receiving a time reference signal corresponding to data information sent by a preset time source, adding a preset number of seconds to a preset time information part of the time information to obtain time information to be displayed, and sending the time information to a first display module, wherein the first display module displays the time information to be displayed; the digital logic module is used for carrying out preset reset operation on the first light-emitting module after receiving the time reference signal and controlling the reset first light-emitting module to emit light according to a preset light-emitting rule; and the first processor is used for controlling the image acquisition equipment to acquire an image aiming at the target equipment to obtain a verification reference image when the target equipment is determined to be in the working state, so as to determine the exposure time of the verification reference image based on the time information to be displayed, displayed by the first display module, in the verification reference image and the light-emitting unit in the first light-emitting module in the light-emitting state.

By applying the embodiment of the invention, the target device can receive the data information sent by the preset time source, and after receiving the time reference signal corresponding to the data information, the preset seconds are added at the preset time information part of the time information to obtain the time information to be displayed, and the time information is displayed at the first display module, meanwhile, after the digital logic module receives the time reference signal, the digital logic module performs the preset reset operation on the first light-emitting module, controls the reset first light-emitting module to emit light according to the preset light-emitting rule, so as to represent the current time information through the content displayed by the first display module and the light-emitting unit of the first light-emitting module, and further, the first processor controls the image acquisition device to acquire the image aiming at the target device when the target device is determined to be in the working state, so as to obtain the verification reference image, wherein the time information to be displayed by the first display module in the verification reference image and the light-emitting unit in the first light-emitting module are in the light The light-emitting unit can represent time information when the verification reference image is collected, namely real exposure time corresponding to the verification reference image, and time correction is carried out on the first display module and the first light-emitting module through the time reference signal corresponding to the data information, so that display time accumulation errors of the first display module and the first light-emitting module are avoided, and further, the time display result of the target equipment is prevented from deviating. Of course, not all of the advantages described above need to be achieved at the same time in the practice of any one product or method of the invention.

The innovation points of the embodiment of the invention comprise:

1. the target device can receive data information sent by a preset time source, and after receiving a time reference signal corresponding to the data information, a preset number of seconds is added at a preset time information part of the time information to obtain time information to be displayed, and the time information is displayed at a first display module. Furthermore, when the target equipment is determined to be in the working state, the first processor controls the image acquisition equipment to acquire an image for the target equipment to obtain a verification reference image, time information to be displayed by the first display module in the verification reference image and a light-emitting unit in the first light-emitting module in the light-emitting state can be represented, the time information when the verification reference image is acquired can be represented, namely real exposure time corresponding to the verification reference image, and the first display module and the first light-emitting module are subjected to time correction through a time reference signal corresponding to the data information, so that display time accumulated errors of the first display module and the first light-emitting module are avoided, and further, the time display result of the target equipment is prevented from being deviated.

2. After the first processor controls the image acquisition equipment to acquire the verification reference image, the image time stamp can be determined and marked aiming at the verification reference image, the verification reference image marked with the image time stamp is sent to the second processor, the second processor can control the second display module to display the verification reference image and the marked image time stamp, so that a worker can determine the accuracy of the image time stamp according to the verification reference image, the accuracy of the image time stamp marked by the first processor for the verification reference image is determined, and the accuracy of the time stamp determined by the preset time stamp determining mode of the first processor can be verified.

3. After the first processor controls the image acquisition equipment to acquire the verification reference image, the first processor can determine and mark an image time stamp for the verification reference image and send the verification reference image marked with the image time stamp to the second processor, and the second processor can identify the verification reference image, determine to-be-displayed time information displayed by the first display module in the verification reference image and a light-emitting unit in a light-emitting state in the first light-emitting module; and then determining the exposure time of the verification reference image, comparing the exposure time with the image time stamp, and determining the accuracy of the image time stamp so as to realize automatic verification of the accuracy of the image time stamp of the verification reference image and verify the accuracy of the time stamp determined by the preset time stamp determining mode of the first processor.

4. The first controller sends the time information to be displayed to the first display module through the decoder with the latch to ensure that the first display module can be lightened at all times.

5. After receiving the time reference signal, the reset circuit resets the shift register to the initial position 1, so that the normal light emission of the light emitting unit in the first light emitting module is ensured. The first light-emitting module is provided with light-emitting units representing different time precision levels so as to meet the time precision requirements of different user groups.

6. After receiving the time reference signal, the second controller resets the light emitting unit array in the second light emitting module through the second buffer and the decoder; and after a second clock signal sent by the second clock generator is obtained, the light-emitting unit array in the second light-emitting module is controlled to jump and emit light according to a preset jump rule through the second buffer and the decoder, so that the light-emitting unit with higher time precision is provided for timing, and the time precision provided by the target equipment is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is to be understood that the drawings in the following description are merely exemplary of some embodiments of the invention. For a person skilled in the art, without inventive effort, further figures can be obtained from these figures.

FIG. 1 is a schematic diagram illustrating an embodiment of an image exposure time measurement system according to the present invention;

FIG. 2 is a schematic view of another structure of an image exposure time measurement system according to an embodiment of the present invention;

FIG. 3 is a schematic view of another structure of an image exposure time measurement system according to an embodiment of the present invention;

FIG. 4 is a diagram illustrating a specific structure of a digital logic module and a connection relationship between the digital logic module and a first light-emitting module;

FIG. 5 is an exemplary diagram of a verification reference image captured by an image capture device for a target device in an operational state;

fig. 6 is a schematic structural diagram of a target device according to an embodiment of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

It is to be noted that the terms "comprises" and "comprising" and any variations thereof in the embodiments and drawings of the present invention are intended to cover non-exclusive inclusions. A process, method, system, article, or apparatus that comprises, for example, a list of steps or elements or modules is not limited to the listed steps or elements or modules, but may alternatively include additional steps or elements not listed, or additional steps or elements or modules inherent to such process, method, article, or apparatus.

The invention provides an image exposure time measuring system and a target device, which are used for realizing the acquisition of image exposure time and further providing a basis for verifying the accuracy of an image time stamp of an image mark by a processor. The following provides a detailed description of embodiments of the invention.

Fig. 1 is a schematic structural diagram of an image exposure time measurement system according to an embodiment of the present invention. The image exposure time measurement system 100 may include: the system comprises an image acquisition device 110, a first processor 120 and a target device 130, wherein the first processor 120 and the target device 130 are provided with time by a same type of preset time source 140; the target device 130 includes: a first controller 131, a digital logic module 132, a first display module 133, and a first light emitting module 134; the preset time source 140 sends data information to the first controller 131, and sends a time reference signal to the first controller 131 and the digital logic module 132;

the first controller 131 receives and analyzes the data information sent by the preset time source 140 to obtain time information carried by the data information; after receiving a time reference signal corresponding to the data information sent by the preset time source 140, adding a preset number of seconds to a preset time information part of the time information to obtain time information to be displayed, and sending the time information to the first display module 133, where the first display module 133 displays the time information to be displayed;

the digital logic module 132 is configured to perform a preset reset operation on the first light emitting module 134 after receiving the time reference signal, and control the reset first light emitting module 134 to emit light according to a preset light emitting rule;

the first processor 120, when determining that the target device 130 is in the working state, controls the image capturing device 110 to capture an image for the target device 130, so as to obtain a verification reference image, and is configured to determine an exposure time of the verification reference image based on the to-be-displayed time information displayed by the first display module 133 in the verification reference image and the light emitting unit in the light emitting state in the first light emitting module 134.

The preset time source may be any time source that can provide time in the related art, and may be, for example: a GPS (Global Positioning System) Time source, an NTP (Network Time Protocol) Time source, a customized PTP (Precision Time Protocol) Time source, and other customized Time sources. Each time source has a time reference signal, which can be used to correct the timing time of the external device corresponding to the time source. For example, the GPS time source corresponds to a time reference signal which is a PPS (Pulse Per Second) signal whose rising edge corresponds to an accurate UTC (coordinated universal time) time. Accordingly, in this embodiment, each time the first controller 131 and the digital logic module 132 obtain a rising edge of the PPS signal, it can be considered that a time reference signal is obtained.

In one implementation, in the case that the predetermined time source is a GPS time source, the PPS signal generates a rising edge every second, that is, the first controller 131 and the digital logic module 132 obtain a time reference signal every second, and accordingly, the predetermined number of seconds may be 1 second.

In another implementation, if the preset time is a time source other than the GPS time source, the time reference signal corresponding to the other time source may be set to generate a rising edge every N seconds, and correspondingly, the preset number of seconds may be N seconds. In one case, to ensure timely accuracy, the N may be set to 1 second.

The preset time source 140 may send data information to the first controller 131 in real time, where the data information carries time information, and may periodically send a time reference signal to the first controller 131 and the digital logic module 132. The first controller 131 receives and analyzes the data information sent by the preset time source 140 to obtain the time information carried therein, and after receiving the time reference signal corresponding to the data information sent by the preset time source 140, adds a preset number of seconds to the preset time information portion of the time information to obtain the time information to be displayed, and sends the time information to the first display module 133, where the first display module 133 displays the time information to be displayed. For example: when the preset time source is a GPS time source, the preset time information part of the time information is a time part with the second-level precision or more, and the preset seconds are 1 second. For example, when the time information analyzed by the first controller 131 from the received data information is 123.235 seconds, the predetermined time information portion is 123 seconds, the predetermined number of seconds is 1 second, and correspondingly, the time information to be displayed by the first display module 133 is 124.

The time reference signal corresponding to the data information may refer to: the first controller 131 receives the first time reference signal after receiving the data message.

While the first controller 131 receives the time reference signal corresponding to the data information sent by the preset time source 140, the digital logic module 132 receives the time reference signal and performs a preset reset operation on the first light-emitting module 134, that is, the light-emitting units of the first light-emitting module 134 are all set to a non-light-emitting state, and the reset first light-emitting module 134 is controlled to emit light according to a preset light-emitting rule, so that the time information is displayed. In one case, the first controller 131 in the target device 130 may be implemented by an MCU (micro controller Unit).

After the first display module 133 and/or the first light-emitting module 134 of the target device 130 emit light, it may be considered that the target device 130 starts to operate, and enters an operating state.

When determining that the target device 130 is in the working state, the first processor 120 controls the image capturing device 110 to capture an image for the target device 130, so as to obtain a verification reference image, where the verification reference image includes the first display module 133 and content displayed by the first display module 133, and the first light-emitting module 134 and a light-emitting state corresponding to the first light-emitting module 134. Subsequently, the exposure time of the verification reference image may be determined using the information of the time to be displayed, which is displayed by the first display module 133 in the verification reference image, and the light emitting unit in the light emitting state in the first light emitting module 134.

In one implementation, the first processor 120 may not be physically connected to the target device, and at this time, the first processor 120 may determine whether the target device 130 is in an operating state through the recognition of the image captured by the image capturing device with respect to the image captured by the target device 130. For example: if the first processor 120 recognizes that the first display module 133 emits light and/or the first light-emitting module 134 is in a light-emitting state from the image captured by the image capture device for the target device 130, it is determined that the target device 130 is in a working state. In another implementation, the first processor 120 may be physically connected to the target device. Accordingly, in one case, the first processor 120 may determine whether the target device 130 is in an operating state through the recognition of the image captured by the target device 130 by the image capturing device; alternatively, when the target device 130 starts to operate, an operation signal may be sent to the first processor 120 to prompt the first processor 120 to start to operate, and after receiving the operation signal, the first processor 120 may determine that the target device 130 is in an operation state.

In one implementation, the first display module 133 can be a nixie tube, and the nixie tube can realize the representation of the time granularity of the second level or above in the time information, that is, display the specific number of seconds. The first Light Emitting module 134 includes a plurality of Light Emitting units, which may be LED (Light-Emitting Diode) lamps. The plurality of LED lamps of the first light emitting module 134 may have a bar shape. The presentation of the time granularity of the second order or less in the time information is realized by the position of the light-emitting unit in the light-emitting state in the first light-emitting module 134 among the plurality of light-emitting units included in the first light-emitting module 134. Time granularity below the second level may include, but is not limited to: time granularity on the order of hundreds of milliseconds, time granularity on the order of ten milliseconds, time granularity on the order of milliseconds, and the like.

It is understood that the first processor 120 may be an embedded processor of the image capturing device 110, or may be an external processor of the image capturing device 110. In one implementation, the first processor 120 may be a processor on a SOC (System-on-a-Chip).

By applying the embodiment of the invention, the target device can receive the data information sent by the preset time source, and after receiving the time reference signal corresponding to the data information, the preset seconds are added at the preset time information part of the time information to obtain the time information to be displayed, and the time information is displayed at the first display module, meanwhile, after the digital logic module receives the time reference signal, the digital logic module performs the preset reset operation on the first light-emitting module, controls the reset first light-emitting module to emit light according to the preset light-emitting rule, so as to represent the current time information through the content displayed by the first display module and the light-emitting unit of the first light-emitting module, and further, the first processor controls the image acquisition device to acquire the image aiming at the target device when the target device is determined to be in the working state, so as to obtain the verification reference image, wherein the time information to be displayed by the first display module in the verification reference image and the light-emitting unit in the first light-emitting module are in the light The light-emitting unit can represent time information when the verification reference image is collected, namely real exposure time corresponding to the verification reference image, and time correction is carried out on the first display module and the first light-emitting module through the time reference signal corresponding to the data information, so that display time accumulation errors of the first display module and the first light-emitting module are avoided, and further, the time display result of the target equipment is prevented from deviating.

In addition, in the embodiment of the invention, the digital circuit is used for generating high-precision time scales instead of software, and the measurement error of the time granularity is smaller. This mark board equipment 130 is a lightweight portable equipment, can supply power through the lithium cell, is easily carried to the occasion of difference and carries out the verification of image time stamp to different equipment that awaits measuring to use steps are simple, and non-professional also carries out the image time stamp to different equipment that awaits measuring with high efficiency and verifies. The device under test may include the first processor 120 and the image capture device 110 in an embodiment of the invention.

The target device can measure the real exposure time of the image collected by the rolling shutter exposure type image collection device, and can also measure the real exposure time of the image collected by the global exposure type image collection device.

In another embodiment of the present invention, as shown in fig. 2, the image exposure time measuring system 100 may further include a second processor 150 and a second display module 160;

the first processor 120, after controlling the image acquisition device 110 to acquire an image for the target device 130 to obtain a verification reference image, determining an image timestamp of the verification reference image based on a preset timestamp determination mode, and marking the image timestamp; and transmits the image-time-stamped authentication reference image to the second processor 150;

the second processor 150 controls the second display module 160 to display the verification reference image and the marked image timestamp thereof, so that the staff can determine the accuracy of the image timestamp according to the verification reference image.

The second processor 150 may be the same processor as the first processor 120 or a different processor.

In this embodiment, after controlling the image capture device 110 to capture an image for the target device 130 to obtain a verification reference image, the first processor 120 determines and marks an image timestamp of the verification reference image based on a preset timestamp determination manner, and sends the verification reference image with the image timestamp marked to the second processor 150. The preset timestamp determining method may be any one of determining methods that can determine an image timestamp of an image in the related art, where the image timestamp is: the first processor 120 targets information for the image that characterizes the acquisition time of the image.

Correspondingly, the second processor 150 obtains the verification reference image marked with the image timestamp, and sends the verification reference image marked with the image timestamp to the second display module 160, so as to control the second display module 160 to display the verification reference image and the image timestamp marked with the verification reference image for a worker to view, and determine the accuracy of the image timestamp according to the verification reference image.

In another embodiment of the present invention, as shown in fig. 3, the image exposure time measuring system may further include a third processor 170;

the first processor 120, after controlling the image acquisition device 110 to acquire an image for the target device 130 to obtain a verification reference image, determining an image timestamp of the verification reference image based on a preset timestamp determination mode, and marking the image timestamp; sending the image-time-stamped verification reference image to the third processor 170;

the third processor 170, which identifies the verification reference image, and determines the to-be-displayed time information displayed by the first display module 133 in the verification reference image and the light emitting unit in the light emitting state in the first light emitting module 134;

determining the exposure time of the verification reference image based on the to-be-displayed time information displayed by the first display module 133 in the verification reference image and the light-emitting unit in the light-emitting state in the first light-emitting module 134;

Correspondingly, the third processor 170 identifies the verification reference image based on a preset identification algorithm, and determines the to-be-displayed time information displayed by the first display module 133 in the verification reference image and the light-emitting unit in the light-emitting state in the first light-emitting module 134; determining the exposure time of the verification reference image based on the to-be-displayed time information displayed by the first display module 133 in the verification reference image and the light-emitting unit in the light-emitting state in the first light-emitting module 134; and comparing the exposure time with the image time stamp to determine the accuracy of the image time stamp.

The process of comparing the exposure time with the image timestamp and determining the accuracy of the image timestamp may be: an absolute value of the difference between the exposure time and the image timestamp is calculated, the greater the absolute value the less accurate the determination of the image timestamp.

The preset recognition algorithm may include a recognition algorithm based on a character recognition technology, a recognition algorithm based on an image feature, and the like. In one implementation, the third processor may pre-record initial position information of each light-emitting unit in the first light-emitting module 134 in an image acquired by the image acquisition device and a position relationship between each light-emitting unit in the first light-emitting module 134, where the initial position information may be considered by a worker as calibrated; further, the to-be-displayed time information displayed by the first display module 133 is identified from the verification reference image by using a recognition algorithm based on a character recognition technology, the image position information of the light-emitting unit in the light-emitting state in the first light-emitting module 134 is identified from the verification reference image by using a recognition algorithm based on image features, and further, the position of the light-emitting unit in the light-emitting state in the first light-emitting module 134 is determined based on the image position information, the initial position information of each light-emitting unit in the first light-emitting module 134 in the image acquired by the image acquisition device, and the position relationship between the light-emitting units in the first light-emitting module 134, that is, the light-emitting unit in the light-emitting state is the first light-emitting unit in the first light-emitting module 134; further, based on the position of the light emitting unit in the light emitting state in the first light emitting module 134, the time characterized by the first light emitting module 134 is determined; based on the time characterized by the first light-emitting module 134 and the time information to be displayed, the time information included in the verification reference image, i.e. the real exposure time of the verification reference image, is determined.

Accordingly, in the above implementation, in one case, when the image capturing device 110 captures the verification reference image for the target device 130, the relative position relationship between the image capturing device 110 and the target device needs to be kept unchanged.

Alternatively, when the image capturing device 110 captures the verification reference image with respect to the target device 130, the relative positional relationship between the image capturing device 110 and the target device may vary. At this time, the third processor needs to determine change information of the relative position relationship between the image capturing device 110 and the target device in real time, and then determine, based on the change information and the pre-recorded initial position information of each light emitting unit in the first light emitting module 134 in the image, that the position information in the image captured by the image capturing device 110 after the relative position relationship between the image capturing device 110 and the target device of each light emitting unit in the first light emitting module 134 is changed is taken as the first position information, and further determine, based on the image position information, the first position information, and the position relationship between each light emitting unit in the first light emitting module 134, the position of the light emitting unit in the light emitting state in the first light emitting module 134, and further determine the time represented by the first light emitting module 134.

In another embodiment of the present invention, as shown in FIG. 2, the reticle device 130 may further comprise a tape latch decoder 135;

the first controller 131 adds a preset number of seconds to a preset time information portion of the time information to obtain the time information to be displayed, and then sends the time information to be displayed to the first display module 133 through the decoder with latch 135.

In this embodiment, in order to ensure that all nixie tubes can be lit at all times after the target device 130 processes the working state, the first controller 131 of the target device 130 is connected to the first display module 133 through the decoder with latch 135, and the first controller 131 adds the preset number of seconds to the preset time information portion of the time information to obtain the time information to be displayed, and then sends the time information to be displayed to the first display module 133 through the decoder with latch 135. The decoder with latch 135 is a decoder with latch function, i.e., memory function. The first controller 131 inputs a signal to the latch decoder 135, and controls the latch decoder 135 to memorize the value of the input signal by the 1 latch pin, so that it is not necessary to continuously input the value of the signal to the latch decoder 135. When the value of the signal input to the latch decoder 135 by the first controller 131 changes, the output generated by the value of the input signal stored in the latch decoder 135 does not change. The use of the pin of the first controller 131 may be saved using the latched decoder 135; the first controller 131 may connect a plurality of the latched decoders 135 in parallel using the same input pin, and sequentially output different values to different latched decoders 135 through the latch pins of the latched decoders 135. The latched decoder 135 may be implemented by a 74HC4511 chip.

Considering the exposure mode of the image capturing device of the rolling shutter exposure type, that is, when the image capturing device of the rolling shutter exposure type captures an image, the photosensitive arrays in each line are sequentially controlled to sense light to capture the exposure mode of the image, and the decoder 135 with latch can avoid the situation that the display content of the first display module 133 in the verification reference image is difficult to identify due to the rolling shutter effect of the image capturing device to a certain extent.

In another embodiment of the present invention, as shown in FIG. 4, the digital logic module 132 comprises: a first clock generator 1321, a reset circuit 1322, a shift register 1323, and a first buffer 1324;

the reset circuit 1322 resets the shift register 1323 after receiving the time reference signal, and aligns with the first clock generator 1321; and the first position 1 of the reset shift register 1323; the aligned first clock generator 1321 inputs a first clock signal to the shift register 1323 after the reset and leading position 1 at a preset frequency, so that the shift register 1323 after the reset and leading position 1 controls the light emitting unit in the first light emitting module 134 to jump through the first buffer 1324.

In this embodiment, the digital logic module 132 is connected to the preset time source through the reset circuit 1322, receives the time reference signal sent by the preset time source, and after receiving the time reference signal, the reset circuit 1322 sends a negative pulse to all the shift registers 1323 and the first clock generator 1321, so as to reset the shift registers 1323, that is, reset the light emitting unit of the first light emitting module 134; and aligns the shift register 1323 with the first clock generator 1321; in order to ensure that the light emitting units of the first light emitting module 134 emit light normally, the first light emitting module 134 does not have the situation that all the light emitting units are in the non-light emitting state under the condition that the target device 130 is in the working state; after the reset circuit 1322 resets the shift register 1323, the first position 1 of the reset shift register 1323, that is, the first-located light-emitting unit of the first light-emitting module 134 is controlled to be in a light-emitting state; the aligned first clock generator 1321 inputs a first clock signal to the shift register 1323 after the reset and leading position 1 at a preset frequency, so that the shift register 1323 after the reset and leading position 1 controls the light emitting unit in the first light emitting module 134 to jump right through the first buffer 1324.

The preset frequency is set based on the time precision of the time represented by the light emitting units in the first light emitting module 134. The first clock generator may be implemented by a SI5341 chip.

In one case, the first light emitting module 134 includes a first light emitting unit characterizing a temporal granularity on the order of hundred milliseconds, a second light emitting unit characterizing a temporal granularity on the order of ten milliseconds, and a third light emitting unit characterizing a temporal granularity on the order of milliseconds. After the reset circuit 1322 resets the shift register 1323, the first position 1 of the reset shift register 1323 may be: controlling the light emitting unit of the first light emitting module 134 to be in a light emitting state, representing zero hundred milliseconds; and the light emitting unit located at the head of the second light emitting unit of the first light emitting module 134 is controlled to be in a light emitting state, representing zero ten milliseconds, and the light emitting unit located at the head of the third light emitting unit of the first light emitting module 134 is controlled to be in a light emitting state, representing zero milliseconds.

The reset circuit 1322 may be any one of the related art reset circuits that can reset the shift register 1323 and align the shift register 1323 with the first clock generator 1321, and can reset the first position 1 of the reset shift register 1323, and the specific circuit connection thereof is not limited in the embodiment of the present invention. The first bit of the shift register 1323 may refer to the lowest bit of the shift register 1323.

In one case, the function of the reset circuit 1322 can also be realized by an FPGA (Field-Programmable Gate Array).

In another embodiment of the present invention, the preset time information part is: second-level precision and above of the time information;

the first implementation mode comprises the following steps:

the shift register 1323 includes a shift register of hundred milliseconds, and the first light-emitting module 134 includes a first light-emitting unit corresponding to the shift register of hundred milliseconds; a first clock generator 1321 that inputs a first clock signal to the shift register of one hundred milliseconds after the reset start position 1 at a first frequency;

after the shift register with the first position 1 is reset, every time a first clock signal is obtained, the first buffer 1324 controls the LED lamp in the first light-emitting unit to jump one to the right.

In this implementation manner, the time precision of the time displayed by the target device 130 may reach hundreds of milliseconds, that is, the time precision of the time displayed by the first display module 133 and the first light emitting unit 134 of the target device 130 may reach hundreds of milliseconds. It will be appreciated that to ensure that the determined time is accurate, the first lighting unit may comprise ten lighting units, for example ten LED lights. Considering the exposure mode of the rolling shutter exposure type image capturing apparatus, which captures the exposure characteristics of an image, the ten LED lamps of the first light emitting unit are arranged in a row above the target device 130.

Correspondingly, the first frequency may be 0.01KHz, that is, the first clock generator 1321 inputs the first clock signal to the shift register of hundred milliseconds after the reset and start position 1 at the frequency of 0.01KHz, and resets the shift register of hundred milliseconds after the start position 1, and when each first clock signal is obtained, the first buffer controls the LED lamp in the first light-emitting unit to jump to the right by one. Namely, the shift register of hundred milliseconds after the reset and initial position 1 controls the first LED lamp in the first light-emitting unit to change from the light-emitting state to the non-light-emitting state and the second LED lamp in the first light-emitting unit to change from the non-light-emitting state to the light-emitting state through the first buffer 1324 when receiving the first clock signal after the reset and initial position 1, so as to realize the jump of the LED lamps in the first light-emitting unit; when receiving a second first clock signal after the reset and first position 1, the first buffer 1324 is used for controlling the second LED lamp in the first light-emitting unit to change from the light-emitting state to the non-light-emitting state, and the third LED lamp in the first light-emitting unit to change from the non-light-emitting state to the light-emitting state, so that when receiving a ninth first clock signal after the reset and first position 1, the first buffer 1324 is used for controlling the ninth LED lamp in the first light-emitting unit to change from the light-emitting state to the non-light-emitting state, and the tenth LED lamp is changed from the non-light-emitting state to the light-emitting state; when a tenth first clock signal after reset and the first position 1 is received, the first buffer 1324 controls the tenth LED lamp in the first light-emitting unit to change from a light-emitting state to a non-light-emitting state, and the first LED lamp in the first light-emitting unit changes from the non-light-emitting state to the light-emitting state, so as to realize sequential cycle jump.

The second implementation mode comprises the following steps:

the shift register 1323 includes a shift register of a hundred millisecond order and a shift register of a ten millisecond order, and the first light emitting module 134 includes: a first light-emitting unit corresponding to the hundred millisecond shift register and a second light-emitting unit corresponding to the ten millisecond shift register; a first clock generator 1321 that inputs a first clock signal to the shift register of ten milliseconds after the reset and first position 1 at a second frequency;

correspondingly, after the ten-millisecond shift register is reset and the head position is 1, when a first clock signal is obtained, the LED lamps in the second light-emitting unit are controlled to jump one right through the first buffer 1324; after the ten-millisecond shift register after the reset and initial position 1 controls the LED lamp in the second light-emitting unit to jump ten times in sequence through the first buffer 1324, the hundred-millisecond shift register after the reset and initial position 1 controls the LED lamp in the first light-emitting unit to jump one right through the first buffer 1324.

In this implementation manner, the time precision of the time displayed by the target device 130 may reach ten milliseconds, that is, the time precision of the time displayed by the target device 130 through the first display module 133 and the first light emitting unit and the second light emitting unit of the first light emitting module 134 may reach ten milliseconds. It will be appreciated that, to ensure that the determined time is accurate, the first lighting unit may comprise ten lighting units, for example ten LED lights; and the second light emitting unit may include ten light emitting units, for example, ten LED lamps. Considering the exposure manner of the image pickup device of the rolling shutter exposure type, which collects the exposure characteristics of the image, the ten LED lamps of the first light emitting unit and the ten LED lamps of the second light emitting unit are arranged in a row above the target device 130.

Correspondingly, the second frequency may be 0.1KHz, that is, the first clock generator 1321 inputs the first clock signal to the shift register of ten milliseconds after resetting and beginning 1 at the frequency of 0.1KHz, and resets the shift register of ten milliseconds after beginning 1, and when obtaining a first clock signal, the first buffer controls the LED lamp in the second light emitting unit to jump to the right by one; after the ten-millisecond shift register after the reset and initial position 1 controls the LED lamp in the second light-emitting unit to jump ten times in sequence through the first buffer 1324, the hundred-millisecond shift register after the reset and initial position 1 controls the LED lamp in the first light-emitting unit to jump one right through the first buffer 1324. The ten-millisecond shift register after the reset and first position 1 controls the first LED lamp in the second light-emitting unit to change from the light-emitting state to the non-light-emitting state and the second LED lamp in the second light-emitting unit to change from the non-light-emitting state to the light-emitting state through the first buffer 1324 when receiving the first clock signal after the reset and first position 1; when receiving a second first clock signal after the reset and first position 1, controlling a second LED lamp in the second light-emitting unit to change from a light-emitting state to a non-light-emitting state through the first buffer 1324, and controlling a third LED lamp in the second light-emitting unit to change from the non-light-emitting state to the light-emitting state, so that when receiving a ninth first clock signal after the reset and first position 1, controlling a ninth LED lamp in the second light-emitting unit to change from the light-emitting state to the non-light-emitting state through the first buffer 1324, and controlling a tenth LED lamp in the second light-emitting unit to change from the non-light-emitting state to the light-emitting state through the first buffer 1324; when receiving a tenth first clock signal after the reset and head position 1, controlling a tenth LED lamp in the second light-emitting unit to change from a light-emitting state to a non-light-emitting state through the first buffer 1324, and controlling a first LED lamp in the second light-emitting unit to change from the non-light-emitting state to the light-emitting state through the first buffer 1324, and simultaneously controlling a first LED lamp in the first light-emitting unit to change from the light-emitting state to the non-light-emitting state through the shift register of hundred milliseconds after the reset and head position 1, and changing a second LED lamp in the first light-emitting unit from the non-light-emitting state to the light-emitting state through the first buffer 1324; with such a change, when the shift register of ten milliseconds after the reset and first position 1 receives the twenty first clock signals after the reset and first position 1, the tenth LED lamp in the second light-emitting unit is controlled to change from the light-emitting state to the non-light-emitting state through the first buffer 1324, and the first LED lamp in the second light-emitting unit changes from the light-emitting state to the non-light-emitting state, and at the same time, the shift register of hundred milliseconds after the reset and first position 1 controls the second LED lamp in the first light-emitting unit to change from the light-emitting state to the non-light-emitting state through the first buffer 1324, and the third LED lamp in the first light-emitting unit changes from the non-light-emitting state to the non-light-emitting state, so that the cycle jump of the LED lamps in the first light-emitting unit and the second light-emitting unit is realized.

The third implementation mode comprises the following steps:

as shown in fig. 4, the shift register 1323 includes a shift register of hundred milliseconds, a shift register of ten milliseconds, and a shift register of millisecond, and the first light emitting module 134 includes: a first light-emitting unit corresponding to the hundred millisecond shift register, a second light-emitting unit corresponding to the ten millisecond shift register and a third light-emitting unit corresponding to the millisecond shift register; a first clock generator 1321 for inputting a first clock signal to the millisecond shift register after the reset start position 1 at a third frequency;

correspondingly, after the millisecond-level shift register is reset and is at the initial position 1, when a first clock signal is obtained, the LED lamps in the third light-emitting unit are controlled to jump one right through the first buffer; after the millisecond-level shift register after the reset and initial position 1 controls the LED lamp in the third light-emitting unit to jump ten times in sequence through the first buffer, the millisecond-level shift register after the reset and initial position 1 controls the LED lamp in the second light-emitting unit to jump one right through the first buffer; after the ten-millisecond shift register after the reset and initial position 1 controls the LED lamp in the second light-emitting unit to jump ten times in sequence through the first buffer, the hundred-millisecond shift register after the reset and initial position 1 controls the LED lamp in the first light-emitting unit to jump one right through the first buffer.

In this implementation, the time precision of the time displayed by the target device 130 can reach millisecond level. It will be appreciated that, to ensure that the determined time is accurate, the first lighting unit may comprise ten lighting units, for example ten LED lights; and the second lighting unit may comprise ten lighting units, for example ten LED lamps; and the third light emitting unit may include ten light emitting units, for example, ten LED lamps. Considering the exposure mode of the rolling shutter exposure type image capturing apparatus, the rolling shutter exposure type image capturing apparatus captures the exposure characteristics of an image, and the ten LED lamps of the first light emitting unit, the ten LED lamps of the second light emitting unit, and the ten LED lamps of the third light emitting unit are arranged in a row and above the target apparatus 130.

Correspondingly, the third frequency may be 1KHz, that is, the first clock generator 1321 inputs the first clock signal to the millisecond shift register after resetting and beginning 1 at the frequency of 1KHz, and the millisecond shift register after resetting and beginning 1 jumps to the right by one LED lamp in the third light emitting unit through the first buffer when obtaining one first clock signal; after the millisecond-level shift register after the reset and initial position 1 controls the LED lamp in the third light-emitting unit to jump ten times in sequence through the first buffer 1324, the millisecond-level shift register after the reset and initial position 1 controls the LED lamp in the second light-emitting unit to jump one right through the first buffer 1324; after the ten-millisecond shift register after the reset and initial position 1 controls the LED lamp in the second light-emitting unit to jump ten times in sequence through the first buffer 1324, the hundred-millisecond shift register after the reset and initial position 1 controls the LED lamp in the first light-emitting unit to jump one right through the first buffer 1324.

When receiving a first clock signal after reset and first position 1, the millisecond-level shift register controls a first LED lamp in the third light-emitting unit to change from a light-emitting state to a non-light-emitting state and a second LED lamp in the third light-emitting unit to change from the non-light-emitting state to the light-emitting state through the first buffer 1324; when receiving a second first clock signal after the reset and first position 1, controlling a second LED lamp in the third light-emitting unit to change from a light-emitting state to a non-light-emitting state through the first buffer 1324, and controlling a third LED lamp in the third light-emitting unit to change from the non-light-emitting state to the light-emitting state, so that when receiving a ninth first clock signal after the reset and first position 1, controlling a ninth LED lamp in the third light-emitting unit to change from the light-emitting state to the non-light-emitting state through the first buffer 1324, and controlling a tenth LED lamp in the third light-emitting unit to change from the non-light-emitting state to the light-emitting state through the first buffer 1324; when receiving a tenth first clock signal after the reset and head position 1, the tenth LED lamp in the third light-emitting unit is controlled to change from the light-emitting state to the non-light-emitting state through the first buffer 1324, the first LED lamp in the third light-emitting unit changes from the non-light-emitting state to the light-emitting state, and at the same time, the shift register of ten milliseconds after the reset and head position 1 controls the first LED lamp in the second light-emitting unit to change from the light-emitting state to the non-light-emitting state through the first buffer 1324, and the second LED lamp in the second light-emitting unit changes from the non-light-emitting state to the light-emitting state.

Until the millisecond-level shift register after the reset and first position 1 receives a second ten first clock signals after the reset and first position 1, the first buffer 1324 controls the tenth LED lamp in the third light-emitting unit to change from a light-emitting state to a non-light-emitting state, the first LED lamp in the third light-emitting unit changes from the non-light-emitting state to the light-emitting state, meanwhile, the millisecond-level shift register after the reset and first position 1 controls the second LED lamp in the second light-emitting unit to change from the light-emitting state to the non-light-emitting state through the first buffer 1324, and the third LED lamp in the second light-emitting unit changes from the non-light-emitting state to the light-emitting state.

When receiving a first hundred of first clock signals after the reset and head 1, the millisecond-level shift register controls a tenth LED lamp in the third light-emitting unit to change from a light-emitting state to a non-light-emitting state through the first buffer 1324, and a first LED lamp in the third light-emitting unit changes from the non-light-emitting state to the light-emitting state, and simultaneously controls a tenth LED lamp in the second light-emitting unit to change from the light-emitting state to the non-light-emitting state through the first buffer 1324, and a first LED lamp in the second light-emitting unit changes from the non-light-emitting state to the light-emitting state; meanwhile, the shift register of hundred milliseconds after the reset start position 1 controls the first LED lamp in the first light emitting unit to change from the light emitting state to the non-light emitting state and the second LED lamp in the first light emitting unit to change from the non-light emitting state to the light emitting state through the first buffer 1324. With such variations.

When receiving a second hundred first clock signals after the reset and head 1, the millisecond-level shift register controls a tenth LED lamp in the third light-emitting unit to change from a light-emitting state to a non-light-emitting state through the first buffer 1324, and a first LED lamp in the third light-emitting unit changes from the non-light-emitting state to the light-emitting state, and simultaneously controls a tenth LED lamp in the second light-emitting unit to change from the light-emitting state to the non-light-emitting state through the first buffer 1324, and a first LED lamp in the second light-emitting unit changes from the non-light-emitting state to the light-emitting state; meanwhile, the shift register of hundred milliseconds after the reset start position 1 controls the second LED lamp in the first light emitting unit to change from the light emitting state to the non-light emitting state and the third LED lamp in the first light emitting unit to change from the non-light emitting state to the light emitting state through the first buffer 1324.

The three LED lamps with different precision levels only have one light-emitting state at the same time, namely only one light-emitting unit in the first light-emitting unit is in the light-emitting state at the same time, only one light-emitting unit in the second light-emitting unit is in the light-emitting state, and only one light-emitting unit in the third light-emitting unit is in the light-emitting state.

In another embodiment of the present invention, in order to facilitate reading with a time granularity of hundreds of milliseconds, as shown in fig. 4, the target device 130 may further include: a third display module 180; the third display module 180 is connected to the first buffer 1324 through the encoder 190; the encoder may be implemented by a 74hc147 chip;

the third display module 180 displays the number of times that the shift register of hundred milliseconds controls the LED lamp in the first light emitting unit to jump to the right through the first buffer 1324.

When the shift register of hundred milliseconds controls the first LED lamp in the first light emitting unit to emit light through the first buffer 1324, the third display module 180 displays a number "0", when the shift register of hundred milliseconds controls the second LED lamp in the first light emitting unit to emit light through the first buffer 1324, the third display module 180 displays a number "1", which is changed in sequence, and when the shift register of hundred milliseconds controls the tenth LED lamp in the first light emitting unit to emit light through the first buffer 1324, the third display module 180 may display a number "9". The third display module 180 may be implemented by a nixie tube.

In one implementation, considering the exposure mode of the rolling shutter exposure type image capture device, the rolling shutter exposure type image capture device captures the exposure characteristics of the image, with time granularity below the second level, i.e., millisecond, ten millisecond, and hundred millisecond: may be represented by an LED lamp in a first lighting unit, an LED lamp in a second lighting unit, and an LED lamp in a third lighting unit of the first lighting module 134 disposed above the target device 130. For convenience of interpretation, the third display module 180 may be disposed at the right side of the first light emitting unit, and the position where the third display module 180 is disposed in the target device 130 may be maximally parallel to the LED lamp in the first light emitting unit, the LED lamp in the second light emitting unit, and the LED lamp in the third light emitting unit in consideration of time accuracy.

In another embodiment of the present invention, the time precision of the real exposure time of the image is extended, and as shown in fig. 2, the target device 130 may further include: a second clock generator 136, a second controller 137, a second buffer 138, a decoder 139, and a second light emitting module 1310; the second clock generator 136 sends a second clock signal at a fourth frequency to the second controller 137;

the second controller 137 resets the light emitting cell array in the second light emitting module 1310 through the second buffer 138 and the decoder 139 after receiving the time reference signal; after a second clock signal sent by the second clock generator 136 is obtained, the second buffer 138 and the decoder 139 control the light emitting cell array in the second light emitting module 1310 to emit light according to a preset transition rule; the preset hopping rule is as follows: from left to right, and jumping from top to bottom, the jumping frequency of the light emitting cell array in the second light emitting module 1310 is higher than that of the light emitting cells in the first light emitting module 134.

The second clock generator 136 may be implemented by an SI5341 chip, and the light emitting unit array in the second light emitting module 1310 may include 8 × 2 LED dot matrix arrays, where each LED light dot matrix includes 8 × 8 LDE lights.

In this embodiment, the target device 130 is an extensible and re-developed device. In order to meet the user requirement, a second light emitting module 1310, i.e., 8 × 2 LED dot matrix arrays with a specification of 8 × 8, 1024 dot matrix LED lamps, may be disposed below the target device 130, and the second controller 137 may control the function of the second light emitting module 1310.

In this embodiment, after receiving the time reference signal, the second controller 137 sequentially passes through the second buffer 138 and the decoder 139 to reset the light emitting cell array in the second light emitting module 1310, and after obtaining a second clock signal sent by the second clock generator 136, the second controller 137 and the decoder 138 control the light emitting cell array in the second light emitting module 1310 to emit light in a hopping manner according to the preset hopping rule. To represent time information by the light emitting cells in the light emitting cell array in the second light emitting module 1310 in a light emitting state in combination with the first light emitting module 134 and the first display module 133. In one case, the LED lamp in the second light module 1310 is circular.

The second controller 137 may output a control signal based on the number of the received second clock signals after receiving the time reference signal and every time a second clock signal sent by the second clock generator 136 is obtained, the control signal is input to the decoder 138 through the second buffer 137, and the decoder 138 may decode the control signal into: the characterization controls the light emitting unit of the row and column of the light emitting unit array in the second light emitting module 1310 to emit light, and thus controls the light emitting unit of the row and column to emit light. The second buffer 137 may increase the driving capability of the second controller 137 for the light emitting cell array in the second light emitting module 1310 to a certain extent, so as to ensure that the light emitting cell array in the second light emitting module 1310 can emit light.

The fourth frequency may be 10KHz, that is, the second clock generator 136 sends the clock signal to the second controller 137 at a frequency of 10KHz, and accordingly, the time precision of the time displayed by the target device 130 may reach 0.1 millisecond level, that is, the light emitting unit array in the second light emitting module 1310 is a time information portion that may represent 0.1 millisecond level in the time information. For clarity of description, in the embodiment of the present invention, the clock signal sent by the second clock generator 136 is referred to as the second clock signal.

The second controller 137 may be implemented by an FPGA (Field-Programmable Gate Array). The FPGA can be flexibly programmed, and the usage of the light emitting cell array in the second light emitting module 1310 can be changed by changing the software program loaded in the FPGA, for example: the FPGA can control the light emitting units in the light emitting unit array in the second light emitting module 1310 to emit light, so as to represent exposure parameters when the corresponding image capturing device captures an image, and specifically, the light emitting units can be set according to user requirements.

In order to ensure that the light emitting cells of the first light emitting module 134 have the same transition time reference as the light emitting cell array of the second light emitting module 1310, the first clock transmitter 1321 and the second clock transmitter 136 are the same clock generator, and each of the clock generators corresponds to a different clock output channel, and the clock generator is implemented by an SI5341 chip. In the case where the first light emitting module 134 includes a first light emitting unit characterizing a time granularity of a hundred millisecond order, a second light emitting unit characterizing a time granularity of a ten millisecond order, and a third light emitting unit characterizing a time granularity of a millisecond order, a frequency of a clock output channel corresponding to the first clock transmitter 1321 is 1 KHz; when the array of light emitting cells in the second light emitting module 1310 represents time with time granularity of 0.1 msec, the frequency of the clock output channel corresponding to the second clock transmitter 136 is 10 KHz.

As shown in fig. 5, an example of a verification reference image captured by the image capture device 110 for the target device 130 in an operating state is shown. The image capturing device 110 is a rolling shutter exposure type image capturing device, and the upper left corner of the verification reference image is an image time stamp in microseconds marked by the first processor 120 by using the time provided by the preset time source as a reference, that is, the preset time stamp determination manner is "1568278789.937076". In order to verify the operating characteristics of the image capturing device of the rolling shutter exposure type, i.e., the target device 130, and ensure that accurate exposure time can be measured for the image capturing device of the rolling shutter exposure type and the image capturing device of the global exposure type, the first light emitting module 134 is disposed above the target device 130, the first light emitting unit, the second light emitting unit, and the third light emitting unit of the first light emitting module 134 are arranged in a row, the third display module is disposed on the right side of the first light emitting module 134, i.e., the upper right corner of the target device 130, and is parallel to the third light emitting unit as much as possible, and the first display module 133 is disposed below the first light emitting module 134. The second light emitting module 1310 is disposed below the first display module 133.

The target device 130 determines that the time measured by the target device 130 in the verification reference image is 1568278789.937-1568278789.939 by the third light-emitting unit, namely the first 10 LED lamps from left to right, the second light-emitting unit, namely the 31 st to 40 th LED lamps from left to right, the LED lamps in the light-emitting state, namely the 7 th to 9 th LED lamps in the third light-emitting unit, the 3 rd LED lamp in the second light-emitting unit, the 9 th LED lamp in the first light-emitting unit, and the content "1568278789" displayed by the first display module 133 under the first light-emitting unit 134, in the first light-emitting unit 134, and the first processor 120 marks the image time stamp of the verification reference image by the application program based on the time provided by the preset time source, to "1568278789.937076", the match, and thus, the first processor 120, may be determined to be more accurate in verifying the image timestamp of the reference image marker. Due to the working characteristics of the image acquisition equipment of the roller shutter exposure type, 3 LED lamps, namely 7 th to 9 th LED lamps, in the third light-emitting unit in the reference image are verified to be in a light-emitting state.

In one case, in order to ensure that the time information displayed by the target device 130 included in the verification reference image is closer to the real exposure time of the verification reference image acquired by the image acquisition device, the first light-emitting module of the target device 130 may be ensured to be located in a preset area, such as a central area, of the verification reference image as much as possible.

In the first light-emitting module 134 of the target device 130 shown in fig. 5, the 11 th to 30 th LED lamps from left to right are reserved extension positions, and a user can use the reserved extension positions according to the needs of the user.

Corresponding to the above system embodiment, an embodiment of the present invention provides a target device, and as shown in fig. 6, the target device 60 includes: a first controller 61, a digital logic module 62, a first display module 63, and a first light emitting module 64;

the first controller 61 obtains and analyzes data information sent by a preset time source to obtain time information carried by the data information; after receiving the time reference signal corresponding to the data information sent by the preset time source, adding a preset number of seconds to a preset time information part of the time information to obtain time information to be displayed, and sending the time information to the first display module 63, wherein the first display module 63 displays the time information to be displayed;

after receiving the time reference signal, the digital logic module 62 performs a preset reset operation on the first light emitting module 64, and controls the reset first light emitting module 64 to emit light according to a preset light emitting rule.

The preset time source sends data information to the first controller, and sends time reference signals to the first controller 61 and the digital logic module 62. The preset time source is the same as the time source required by the device to be verified, which needs to measure the exposure time by using the reticle device, and the device to be verified can be an image acquisition device and also can be a processor for marking an image timestamp for an acquired image by the image acquisition device.

By applying the embodiment of the invention, the target device can receive the data information sent by the preset time source, and after receiving the time reference signal corresponding to the data information, increase the preset seconds at the preset time information part of the time information to obtain the time information to be displayed, and display the time information at the first display module, meanwhile, after receiving the time reference signal, the digital logic module performs the preset reset operation on the first light-emitting module and controls the reset first light-emitting module to emit light according to the preset light-emitting rule, so that the current time information is represented by the content displayed by the first display module and the light-emitting unit of the first light-emitting module; and time correction is carried out on the first display module and the first light-emitting module through the time reference signal corresponding to the data information, so that the display time accumulation error of the first display module and the first light-emitting module is avoided, and further the time display result of the target equipment is prevented from deviating.

In another embodiment of the present invention, as shown in fig. 6, the reticle device 60 may further include a strip latch decoder 65;

the first controller 61 adds a preset number of seconds to a preset time information portion of the time information to obtain time information to be displayed, and then sends the time information to be displayed to the first display module 63 through the decoder with latch 65.

Optionally, the digital logic module 62 includes: a first clock generator 621, a reset circuit 622, a shift register 623, and a first buffer 624;

after receiving the time reference signal, the reset circuit 622 resets the shift register 623, and aligns the first clock generator 621 with the reset shift register 623; and the first position of the reset shift register 623 is 1; the aligned first clock generator 621 inputs a first clock signal to the shift register 623 after the reset merging position 1 at a preset frequency, so that the shift register 623 after the reset merging position 1 controls the light emitting unit in the first light emitting module 64 to jump through the first buffer 624.

the second implementation mode comprises the following steps:

the third implementation mode comprises the following steps:

as shown in fig. 6, the shift register 623 includes a hundred-millisecond shift register, a ten-millisecond shift register, and a millisecond shift register, and the first light-emitting module 64 includes: a first light-emitting unit corresponding to the hundred millisecond shift register, a second light-emitting unit corresponding to the ten millisecond shift register, and a third light-emitting unit corresponding to the millisecond shift register; the first clock generator inputs a first clock signal to the millisecond-level shift register after the reset start position 1 at a third frequency;

correspondingly, after the millisecond-level shift register is reset and starts at position 1, when a first clock signal is obtained, the first buffer 624 controls the LED lamp in the third light-emitting unit to jump to the right by one; after the millisecond-level shift register after resetting and initial position 1 controls the LED lamps in the third light-emitting unit to jump ten times in sequence through the first buffer 624, the ten millisecond-level shift register after resetting and initial position 1 controls the LED lamps in the second light-emitting unit to jump one right through the first buffer 624; after the ten-millisecond shift register after resetting and initial position 1 controls the LED lamp in the second light emitting unit to jump ten times in sequence through the first buffer 624, the hundred-millisecond shift register after resetting and initial position 1 controls the LED lamp in the first light emitting unit to jump one right through the first buffer 624.

In another embodiment of the present invention, the target device 60 may further include: a third display module 66; the third display module is connected with the first buffer through an encoder;

the third display module 66 displays the number of times that the hundred millisecond shift register controls the LED lamp in the first light emitting unit to make a right jump through the first buffer 624.

Optionally, the target device 60 may further include: a second clock generator 67, a second controller 68, a second buffer 69, a decoder 610, and a second light emitting module 611; the second clock generator 67 sends a second clock signal at a fourth frequency to the second controller 68;

the second controller 68 resets the light emitting cell array in the second light emitting module 611 through the second buffer 69 and the decoder 610 after receiving the time reference signal; after a second clock signal sent by the second clock generator 67 is obtained, the second buffer 69 and the decoder 610 control the light emitting unit array in the second light emitting module 611 to emit light in a hopping manner according to a preset hopping rule; wherein, the preset jump rule is as follows: from left to right and from top to bottom, the hopping frequency of the light emitting cell array in the second light emitting module is higher than the hopping frequency of the light emitting cells in the first light emitting module 64.

In order to ensure that the light emitting units of the first light emitting module 64 have the same transition time reference as the light emitting unit array of the second light emitting module 611, the first clock transmitter 621 and the second clock transmitter 67 are the same clock generator, and each of the clock generators corresponds to a different clock output channel, and the clock generator is implemented by an SI5341 chip. In the case where the first light emitting module 64 includes a first light emitting unit representing a time granularity of a hundred millisecond order, a second light emitting unit representing a time granularity of a ten millisecond order, and a third light emitting unit representing a time granularity of a millisecond order, the frequency of the clock output channel corresponding to the first clock transmitter 621 is 1 KHz; when the array of light emitting cells in the second light emitting module 611 represents time of time granularity of the order of 0.1 msec, the frequency of the clock output channel corresponding to the second clock transmitter 67 is 10 KHz.

The above device embodiment corresponds to the system embodiment, and has the same technical effect as the system embodiment, and for the specific description, reference is made to the system embodiment. The device embodiment is obtained based on the system embodiment, and specific description may refer to a part of the system embodiment, which is not described herein again.

Those of ordinary skill in the art will understand that: the figures are merely schematic representations of one embodiment, and the blocks or flow diagrams in the figures are not necessarily required to practice the present invention.

Those of ordinary skill in the art will understand that: modules in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, or may be located in one or more devices different from the embodiments with corresponding changes. The modules of the above embodiments may be combined into one module, or further split into multiple sub-modules.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. An image exposure time measurement system, comprising: the system comprises image acquisition equipment, a first processor and target equipment, wherein the first processor and the target equipment are provided with time by the same type of preset time source; the target device includes: the device comprises a first controller, a digital logic module, a first display module and a first light-emitting module; the preset time source sends data information to the first controller and sends time reference signals to the first controller and the digital logic module;

2. The system of claim 1, wherein the image exposure time measurement system further comprises a second processor and a second display module;

3. The system of claim 1, wherein the image exposure time measurement system further comprises a third processor;

4. The system of claim 1, wherein the reticle device further comprises a tape latch decoder;

5. The system of any of claims 1-4, wherein the digital logic module comprises: the circuit comprises a first clock generator, a reset circuit, a shift register and a first buffer;

6. The system of claim 5, wherein the preset time information part is: second-level precision and above of the time information;

the second implementation mode comprises the following steps:

the third implementation mode comprises the following steps:

7. The system of claim 6, wherein the target device further comprises: a third display module; the third display module is connected with the first buffer through an encoder;

8. The system of any of claims 1-7, wherein the target device further comprises: the second clock generator, the second controller, the second buffer, the decoder and the second light-emitting module; the second clock generator sends a second clock signal to the second controller at a fourth frequency;

9. A target apparatus, comprising: the device comprises a first controller, a digital logic module, a first display module and a first light-emitting module;

10. The reticle device of claim 9, wherein the reticle device further comprises a tape latch decoder;