CN107094249A - A kind of method and device for testing camera delay - Google Patents
A kind of method and device for testing camera delay Download PDFInfo
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- CN107094249A CN107094249A CN201710211543.1A CN201710211543A CN107094249A CN 107094249 A CN107094249 A CN 107094249A CN 201710211543 A CN201710211543 A CN 201710211543A CN 107094249 A CN107094249 A CN 107094249A
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Abstract
The invention discloses a kind of method and device for testing camera delay, first image at clock display interface can be obtained, wherein, described first image is that the image that image is acquired is carried out to the clock display interface using camera to be measured；And the current time presented in the clock display interface can be gathered in the camera output described first image to be measured, and it is shooting time to be gathered from described first image at the time of presentation in the pattern of clock display interface；Afterwards, the delay of the camera to be measured can be determined according to the current time and the shooting time.Compared to prior art, without the shooting time for manually determining to be shot and the current time of the taken image of camera to be measured output, without manually pressing corresponding stopwatch, more without manually calculating the time difference between current time and shooting time, accuracy and efficiency that delay is determined can not only thus be lifted, the wasting of resources can also be reduced, cost is reduced.
Description
Technical Field
The invention relates to the technical field of image processing, in particular to a method and a device for testing camera delay.
Background
At present, in order to improve the shooting effect of shooting equipment such as a video camera, a camera and the like, a camera to be measured of the shooting equipment is generally subjected to time delay measurement. In particular, common ways of testing camera latency may generally include the following two:
first, a way to press a stopwatch. That is, at the same time when the camera is used for shooting, the stopwatch is pressed to start timing, and at the same time when the camera to be measured outputs the image shot by the camera to be measured, the stopwatch is pressed again to stop timing, and then the time in the stopwatch is read, and the read time is used as the delay time of the camera to be measured. However, in this way, not only the shooting time for shooting and the current time for the camera to be tested to output the image need to be manually determined, but also the stopwatch needs to be manually pressed, so that the problems of low accuracy and low efficiency caused by visual errors and reaction errors are easily caused; moreover, in order to further improve the accuracy, more personnel are required to participate in the method, so that the problem of serious resource waste can also occur.
Second, a manual calculation. That is, a certain clock display interface is shot through a camera to obtain an image, when the camera outputs the image, the current time presented in the clock display interface and the shooting time presented in the clock display interface pattern in the image are manually read, the time difference between the two times is manually calculated, and the manually calculated time difference is used as the time delay of the camera. However, in this way, it is necessary to manually determine whether the camera outputs the image, and also to manually read the corresponding current time and shooting time, so that there are still problems of low accuracy and low efficiency caused by visual errors and reaction errors; moreover, in order to improve the accuracy, more personnel are required to participate in the method, so that the problem of more resource waste still exists.
That is to say, the existing method for testing the delay of the camera has the problems of low accuracy, low efficiency and serious resource waste.
Disclosure of Invention
The embodiment of the invention provides a method and a device for testing camera delay, which are used for solving the problems of lower accuracy, lower efficiency, more serious resource waste and the like in the conventional method for testing camera delay.
The embodiment of the invention provides a method for testing camera delay, which comprises the following steps:
acquiring a first image of a clock display interface, wherein the first image is an image obtained by acquiring an image of the clock display interface by using a camera to be tested;
when the camera to be tested outputs the first image, acquiring the current time presented in the clock display interface, and acquiring the time presented in the clock display interface pattern from the first image as the shooting time;
and determining the delay of the camera to be detected according to the current moment and the shooting moment.
Correspondingly, the embodiment of the invention also provides a device for testing the time delay of the camera, which comprises:
the device comprises an acquisition module, a display module and a display module, wherein the acquisition module is used for acquiring a first image of a clock display interface, and the first image is obtained by utilizing a camera to be tested to acquire the image of the clock display interface;
the acquisition module is used for acquiring the current time presented in the clock display interface when the camera to be detected outputs the first image, and acquiring the time presented in the clock display interface pattern from the first image as the shooting time;
and the determining module is used for determining the delay of the camera to be detected according to the current moment and the shooting moment.
Further, an embodiment of the present invention further provides a computing device, which includes a memory and a processor, where the memory is configured to store program instructions, and the processor is configured to call the program instructions stored in the memory, and execute the method for testing camera latency according to an obtained program.
Further, an embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable the computer to execute the method for testing the camera delay.
The invention has the following beneficial effects:
the embodiment of the invention provides a method for testing the time delay of a camera, which can acquire a first image of a clock display interface, wherein the first image is obtained by acquiring an image of the clock display interface by using the camera to be tested; when the camera to be tested outputs the first image, the current time presented in the clock display interface is collected, and the time presented in the clock display interface pattern is collected from the first image and is taken as shooting time; and then, determining the delay of the camera to be detected according to the current moment and the shooting moment. Compared with the prior art, in the embodiment of the invention, the shooting time for shooting and the current time of the shot image output by the camera to be tested do not need to be manually determined, the corresponding stopwatch does not need to be manually pressed, and the time difference between the current time and the shooting time does not need to be manually calculated, so that the problems of low accuracy and low efficiency caused by human visual errors and reaction errors do not exist; in addition, in the embodiment of the invention, the accurate determination of the camera delay can be realized without using more human resources, so that the waste of resources can be reduced, and the cost of delay determination is reduced. The method solves the problems of lower accuracy, lower efficiency and more serious resource waste existing in the existing method for testing the delay of the camera.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic flow chart illustrating a method for testing camera delay according to a first embodiment of the present invention;
fig. 2 is a schematic diagram of a display screen of a display device according to a first embodiment of the present invention;
fig. 3 is a schematic view of a collection flow of the current time and the shooting time provided in the first embodiment of the present invention;
fig. 4 is a schematic diagram illustrating placement of a camera to be tested and a display device according to a first embodiment of the present invention;
fig. 5 is a schematic diagram illustrating a first possible display of a first image according to a first embodiment of the present invention;
fig. 6 is a schematic diagram illustrating a second possible display of a first image according to a first embodiment of the present invention;
fig. 7 is a schematic diagram illustrating information transmission between a camera to be tested and a display device according to a first embodiment of the present invention;
fig. 8 is a schematic diagram illustrating a placement of an image capturing unit and a display device according to a first embodiment of the present invention;
fig. 9 is a schematic diagram illustrating a first possible display of a second image according to a first embodiment of the present invention;
fig. 10 is a schematic diagram illustrating a second possible display of a second image according to a first embodiment of the present invention;
fig. 11 is a schematic diagram illustrating information transmission between the image capturing unit and the arithmetic processing unit according to the first embodiment of the present invention;
fig. 12 is a schematic diagram illustrating a first possible position of an image capturing unit provided in the first embodiment of the present invention;
fig. 13 is a schematic diagram illustrating a second possible position of the camera unit provided in the first embodiment of the present invention;
fig. 14 is a schematic diagram illustrating a relationship between a delay time and a time of a camera to be measured according to a first embodiment of the present invention;
fig. 15 is a schematic structural diagram of a device for testing camera delay according to a second embodiment of the present invention;
fig. 16 is a schematic structural diagram of a computing device provided in the third embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
in order to solve the problems of low accuracy, low efficiency and serious resource waste of the existing method for testing the camera delay, an embodiment of the present invention provides a method for testing the camera delay, which is shown in fig. 1 and is a schematic flow chart of the method for testing the camera delay in the first embodiment of the present invention. Specifically, as shown in fig. 1, the method for testing camera delay in the first embodiment of the present invention may include the following steps:
step 101: acquiring a first image of a clock display interface, wherein the first image is an image obtained by acquiring an image of the clock display interface by using a camera to be tested;
step 102: when the camera to be tested outputs the first image, acquiring the current time presented in the clock display interface, and acquiring the time presented in the clock display interface pattern from the first image as the shooting time;
step 103: and determining the delay of the camera to be detected according to the current moment and the shooting moment.
It should be noted that the clock display interface can be a display screen of any clock in general, such as a display screen of a pointer clock and/or a display screen of a digital clock. The pointer type clock can be any clock such as a quartz clock, a wall clock, a pendulum clock and the like which can present time in a pointer form, and the digital clock can be any clock such as an electronic clock, a smart watch and the like which can present time information in a digital form, as long as the correct time of the corresponding time zone can be represented, for example, the correct time of the east eight zone can be represented. The clock display interface may be a part of a display screen of any clock, such as a certain area in the clock display screen, as long as corresponding time information can be obtained based on the clock display interface.
In addition, the clock may be an independent clock that is independently set, and may also be an integrated clock that is integrated in a corresponding electronic device, for example, an integrated clock that is integrated in other electronic devices such as a mobile phone, a tablet computer, and a computer, which is not limited in this embodiment of the present invention.
The camera to be tested can be a camera to be tested for time delay, such as a camera on shooting equipment such as a camera and a video camera. Certainly, it should be noted that the camera to be measured may also be a camera on other electronic devices such as a mobile phone, a tablet computer, a computer, and a smart watch, and the camera only needs to have a basic image acquisition function (i.e., a shooting function), for example, shooting a clock display interface; the image capturing in the embodiment of the present invention may generally refer to a corresponding shooting action, which is not limited in this respect.
That is to say, in the embodiment of the present invention, a first image of a clock display interface may be obtained, where the first image is an image obtained by obtaining an image of the clock display interface by using a camera to be tested; when the camera to be tested outputs the first image, the current time presented in the clock display interface is collected, and the time presented in the clock display interface pattern is collected from the first image and is taken as shooting time; and then, determining the delay of the camera to be detected according to the current moment and the shooting moment. Compared with the prior art, in the embodiment of the invention, the shooting time for shooting and the current time of the shot image output by the camera to be tested do not need to be manually determined, the corresponding stopwatch does not need to be manually pressed, and the time difference between the current time and the shooting time does not need to be manually calculated, so that the problems of low accuracy and low efficiency caused by human visual errors and reaction errors do not exist; in addition, in the embodiment of the invention, the accurate determination of the camera delay can be realized without using more human resources, so that the waste of resources can be reduced, and the cost of delay determination is reduced. The method solves the problems of lower accuracy, lower efficiency and more serious resource waste existing in the existing method for testing the delay of the camera.
It should be noted that, an execution main body of the method for testing camera delay according to the embodiment of the present invention may generally be a corresponding device for testing camera delay, as long as the execution main body can cooperate with a corresponding camera to be tested to determine the delay of the camera to be tested, which is not limited in this respect in the embodiment of the present invention.
The "when the camera to be tested outputs the first image" refers to a moment when the first image shot by the camera to be tested is displayed in a first display screen corresponding to the camera to be tested. It should be noted that the first display screen corresponding to the camera to be tested may be any display screen connected to the camera to be tested in a wired Communication manner and/or a wireless Communication manner, where the wired Communication manner is not limited to a manner including a Communication cable, and the wireless Communication manner is not limited to a manner including WiFi (wireless fidelity), bluetooth, infrared, zigbee, or NFC (Near Field Communication). Furthermore, it should be noted that, when the camera to be tested is connected to the corresponding first display screen in a wireless communication manner, the camera to be tested and the corresponding first display screen may further include a corresponding wireless transmission unit, so as to realize information transmission between the camera to be tested and the first display screen.
That is, when the camera to be measured is a camera on a shooting device such as a camera or a video camera, the first display screen corresponding to the camera to be measured may be a display screen of the shooting device itself such as the camera or the video camera, for example, if the camera to be measured is a camera on a camera, the first display screen corresponding to the camera to be measured may be a display screen of the camera. Of course, the first display screen may also be another display screen connected to the camera, such as a display screen of an electronic device connected to the camera, such as a mobile phone, a tablet computer, or a computer, for example, if the camera to be tested is a camera on the camera and the camera is connected to a certain computer, the first display screen corresponding to the camera to be tested may also be a display screen of the computer;
similarly, when the camera to be detected is a camera on an electronic device such as a mobile phone, a tablet computer, or a computer, the first display screen corresponding to the camera to be detected may be the display screen on the electronic device such as the mobile phone, the tablet computer, or the computer. Of course, the display screen may also be a display screen of another electronic device, such as another mobile phone, another tablet computer, or another computer, which is connected to the electronic device, such as the mobile phone, the tablet computer, or the computer, as long as the first image captured by the camera to be tested can be displayed, for example, if the camera to be tested is a camera on the mobile phone and the mobile phone is connected to a computer, the first display screen corresponding to the camera to be tested may also be a display screen of the computer, which is not limited in this embodiment of the present invention.
It should be noted that, in the embodiment of the present invention, the shooting time refers to a time presented in a clock display interface pattern in the first image, and may also be a time when the camera to be tested performs a corresponding shooting action, that is, a time when a shutter of the camera to be tested is pressed, for example, if the time when the shutter of the camera to be tested is pressed is 01:12:23 (i.e., 1 hour 12 minutes 23 seconds), it may be determined that the corresponding shooting time is 01:12: 23; the current time is a time when the camera to be detected outputs the first image, and may also be a time when the first image appears in the first display screen corresponding to the camera to be detected, for example, assuming that after the camera to be detected finishes shooting, a time when the corresponding first image appears in the display screen corresponding to the camera to be detected is 01:23:45, that is, the corresponding current time is 01:23: 45.
It should be noted that the time (i.e., the current time) when the camera to be tested outputs the first image can be generally determined in the following manners:
and starting a continuous shooting function or a video recording function of corresponding shooting equipment at the same time or after the camera to be detected shoots the clock display interface to obtain a series of image frames, and taking a shooting moment corresponding to the image frame in which the first image pattern appears in the series of image frames for the first time as a moment when the camera to be detected outputs the first image. The shooting equipment can be a camera, and the shooting equipment can be the same as or different from the camera to be tested; the time interval of the continuous shooting and/or the time interval between two continuous frames in the video can be flexibly set according to the actual situation, for example, the time interval can be set to 0.1 second, and in the normal situation, the time interval of the continuous shooting and/or the time interval between two continuous frames in the video can be set to a smaller value as much as possible. Certainly, the setting of the time interval of the continuous shooting and/or the time interval between two consecutive frames in the video also needs to be according to the computing capability of the corresponding device; or,
when or after the camera to be tested shoots the clock display interface, acquiring a brightness change value of the first display screen, and taking time presented in the clock display interface as the moment when the camera to be tested outputs the first image when the brightness change value of the first display screen is not less than a set brightness change threshold; for example, the brightness of the first display screen may be acquired in real time or at intervals of a first set time, and when it is determined that the brightness change value of the first display screen is not less than a set brightness change threshold, the time presented in the clock display interface at this time is used as the time when the camera to be tested outputs the first image, where the first set time may be flexibly set according to the actual situation, for example, in an occasion with a higher precision requirement, the first set time may be set to a value as small as possible, and in an occasion with a lower precision requirement, the first set time may be set to a value as large as possible; or,
when or after the camera to be tested shoots the clock display interface, acquiring a contrast change value of the first display screen, and taking time presented in the clock display interface as the moment when the camera to be tested outputs the first image when the contrast change value of the first display screen is not less than a set contrast change threshold; for example, the contrast of the first display interface screen may be acquired in real time or every second set time period, and when it is determined that the contrast variation value of the first display interface screen exceeds the set contrast variation threshold, the time displayed in the clock display interface at this time is used as the time when the camera to be detected outputs the first image, where the second set time period may be flexibly set according to an actual situation, for example, in an occasion with a high precision requirement, the second set time period may be set to a value as small as possible, and in an occasion with a low precision requirement, the second set time period may be set to a value as large as possible. It should be noted that the first set time period and the second set time period may be set to be the same or different.
It should be noted that the brightness change threshold and the contrast change threshold can be flexibly set according to actual conditions, as long as it can be accurately determined whether the first image shot by the camera to be detected appears in the first display screen; furthermore, in addition to determining whether the first image appears in the first display screen according to the brightness variation value and the contrast variation value, the determination may be performed according to other parameters, such as a gray value, and the like.
In addition, it should be noted that, in addition to determining the brightness change value in the first display screen, the brightness change value of the setting area in the first display screen may also be determined, where the setting area may be flexibly set according to an actual situation, for example, the middle portion in the first display screen may be used as the setting area, and details thereof are not repeated.
Preferably, in order to improve the accuracy and precision of the determined camera delay, the current time and the precision level of the shooting time may be flexibly set according to an actual situation, for example, the current time and the precision of the shooting time are set to be millisecond or microsecond, and the like, which is not described herein again in the embodiments of the present invention.
Optionally, acquiring the current time presented in the clock display interface, and acquiring the time presented in the clock display interface pattern from the first image as a shooting time may include:
acquiring a second image, wherein the second image is an image obtained by image acquisition of the current time presented in the clock display interface and the shooting time presented in the clock display interface pattern in the first image;
and acquiring the current moment and the shooting moment from the second image based on image processing.
It should be noted that the capturing operation of the second image can be generally performed by a camera unit disposed inside the device for testing the camera delay. The camera unit can be any camera, for example, the camera itself to be tested or other cameras different from the camera to be tested, and when the camera unit is not the camera to be tested, the specification parameters of the camera unit can be the same as or different from the camera to be tested. Specifically, when the camera unit is not the camera to be tested, the camera unit may be disposed in an acquisition module of the device for testing camera delay, and configured to capture the current time presented in the clock display interface and the capture time presented in the clock display interface pattern in the first image, and then display the second image in a second display screen corresponding to the camera unit. Similarly, the camera unit and the second display screen may also be connected in a wired manner and/or a wireless manner, and when the camera unit and the second display screen are connected in a wireless manner, the camera unit and the second display screen may further include corresponding wireless transmission units, which is not described in detail herein.
In general, in order to enable the current time presented in the clock display interface and the shooting time presented in the clock display interface pattern in the first image to be simultaneously shot by the image capturing unit and to ensure the definition of the second image, the clock and the first image may be generally placed together, such as in parallel.
Preferably, in order to further improve the clarity and intuitiveness of the second image captured by the image capturing unit, the clock and the first display screen may be integrated together to form a corresponding display device. At this time, the display screen of the display device may be divided into two regions to correspond to the clock and the first display screen, respectively.
Optionally, before acquiring the first image of the clock display interface, the method may further include:
dividing a display screen of a display device into a plurality of display areas, wherein the plurality of display areas can comprise a first display area and a second display area;
the first display area can be used for displaying the clock display interface, and the second display area can be used for displaying the first image.
It should be noted that the relative positions of the plurality of display areas may be flexibly set according to actual situations, for example, the display areas may be set to be adjacent left and right, adjacent up and down, or not adjacent to each other, and details thereof are not repeated.
For example, as shown in fig. 2, it is assumed that the display screen of the display device is divided into two display areas, that is, the display screen of the display device is divided into a first display area and a second display area, where the first display area may be a left half portion (shown in fig. 2), a right half portion, an upper half portion, a lower half portion, or any other portion of the display screen of the display device, and the second display area may be a right half portion (shown in fig. 2), a left half portion, an upper half portion, a lower half portion, or any other portion of the display screen of the display device, as long as it is ensured that information in the second display area is not mutually occluded with information in the first display area. It should be noted that the first display area may be used to display the clock display interface, and the second display area may be used to display the first image, that is, may be used as the first display screen. Of course, the first display area may also be used to display the first image, and the second display area may also be used to display the clock display interface, which is not described in detail herein.
In order to improve the accuracy of the determined delay, the display screen of the display device can be divided into a plurality of display areas according to actual conditions, so as to respectively display a plurality of clocks and the first display screen. It should be noted that, at this time, the current time may also be determined according to the current times of multiple clocks, for example, an average value of multiple current times may be taken, and details thereof are not described herein.
Next, taking an example that the display screen of the display device is divided into a first display area and a second display area, the first area is a left half of the display screen of the display device, and the second display area is a right half of the display screen of the display device, the collecting process of the current time and the shooting time in the embodiment of the present invention is described in detail:
assuming that the first display area is used for displaying a clock display interface of a certain clock, and the second display area is used for displaying the first image, the whole acquisition process can be divided into the following steps, as shown in fig. 3:
s31: and acquiring an image of a first display area of the display equipment through a camera to be tested.
Fig. 4 is a schematic diagram illustrating placement of a camera to be tested and a display device according to an embodiment of the present invention. Specifically, as can be seen from fig. 4, the camera to be tested may be placed right in front of the first display area of the display screen of the display device, so that the camera to be tested can completely and clearly shoot the first display area of the display screen of the display device, for example, if the moment when the camera to be tested performs the shooting action is 01:12:23, the first image shot by the camera to be tested may be as shown in fig. 5. For another example, when the clock is a pointer clock, the first image can also be as shown in fig. 6.
Of course, it should be noted that the camera to be tested may not be completely placed right in front of the first display area of the display screen of the display device, as long as the time information presented in the clock display interface in the first display area can be clearly and completely shot, which is not described in detail herein.
S32: the camera to be tested transmits the shot first image to the display equipment, so that the display equipment outputs the first image through a second display area of a display screen of the display equipment.
Fig. 7 is a schematic diagram illustrating information transmission between a camera to be tested and a display device according to an embodiment of the present invention. Specifically, taking the clock as a digital clock as an example, the camera to be tested and the display device may be connected in a wired communication manner and/or a wireless communication manner, where fig. 7 is connected in a wired communication manner, and at this time, the display device may display the first image captured by the camera to be tested through the second display area of the display device. It should be noted that, at this time, the time in the first display area of the display device has changed, as shown in fig. 7, it may be changed to 01:23:45, which is not described in detail herein.
S33: and acquiring images of a first display area and a second display area of the display equipment through an image pickup unit.
Fig. 8 is a schematic diagram showing the placement of the image capturing unit and the display device according to the embodiment of the present invention. Specifically, as can be seen from fig. 8, the image capturing unit may be disposed directly opposite to the display screen of the display device, so that the image capturing unit can completely and clearly capture the entire display screen of the display device, for example, if the capturing time displayed on the display device when the capturing unit performs the capturing action is 01:12:23 and the current time is 01:23:45, the second image captured by the image capturing unit may be as shown in fig. 9, and for example, if the clock is a pointer clock, the second image captured by the image capturing unit may also be as shown in fig. 10, which is not repeated.
S34: the image pickup unit sends the second image to a corresponding operation processing unit.
The arithmetic processing unit may generally include two sub-units, such as an extraction sub-unit and an operation sub-unit. The extraction subunit can be generally arranged in an acquisition module of the device for testing the delay of the camera and is used for extracting corresponding current time and shooting time; the computing subunit may be generally disposed in a determining module of the device for testing camera delay, and is configured to calculate a time difference between the current time and the shooting time. Of course, the arithmetic processing unit may further include a corresponding display subunit (i.e., a display screen) for displaying the calculated delay, which is not described herein again.
It should be noted that the second image may be displayed through a second display screen corresponding to the image capturing unit, where the second display screen may be provided separately from the display device or integrated into the display device. When the second display screen is an integrated unit integrated in the display device, the display screen of the display device may be further divided into three display areas, such as corresponding to the clock, the first display screen, and the second display screen, which is not described in detail herein.
Furthermore, when the image capturing unit captures the corresponding second image, the image capturing unit may not display the second image, but may directly transmit the second image to the arithmetic processing unit, so that the arithmetic processing unit displays the second image through the corresponding display sub-unit.
Fig. 11 is a schematic diagram illustrating information transmission between the image capturing unit and the arithmetic processing unit according to the embodiment of the present invention. Specifically, the image capturing unit and the arithmetic processing unit may be connected by a wired communication method and/or a wireless communication method, where fig. 11 illustrates the wired communication method.
It should be noted that, as shown in fig. 12, which is a schematic diagram of a first possible position of the image capturing unit according to the embodiment of the present invention, the arithmetic processing unit may be further integrated in the display device, in this case, the display screen of the display device may be further divided into four display areas, which correspond to the clock, the first display screen, the second display screen and the arithmetic processing unit, respectively. The second display screen and the display subunit of the arithmetic processing unit may also be in the same display area, which is not described in detail herein.
Of course, it should be noted that the areas of the plurality of display regions of the display device may be flexibly set according to actual situations, and if the areas are all the same, the areas may also be set differently. Moreover, different display areas may be overlapped or not overlapped with each other, as long as corresponding shooting time and current time need to be extracted, the extraction can be performed normally, and details are not described herein.
S35: the arithmetic processing unit acquires the current time and the shooting time from the second image based on image processing.
For example, still taking fig. 8 as an example, the arithmetic processing unit may acquire the shooting time 01:12:23 and the current time 01:23:45 from fig. 8 based on image processing.
Specifically, the image processing may generally include a HOG (Histogram of Oriented gradients) technology and an SVM (Support Vector Machine) technology, but it should be noted that the image processing may also include any other technology capable of extracting information in an image.
That is to say, in the embodiment of the present invention, a corresponding second image may be analyzed based on the HOG + SVM technique, corresponding picture information may be extracted from the second image, and then, the required shooting time and the current time may be calculated by matching with the existing digital information model.
As can be seen from the above, in addition to the camera to be measured for determining the delay, to implement the present invention, the actually required device may only include the clock, the first display screen, the camera unit, the second display screen, and the arithmetic processing unit, and in general, the clock, the first display screen, the second display screen, and the arithmetic processing unit may all be integrated in the corresponding display device, so that the actually required device may only include the camera unit and the corresponding display device, which ensures low cost for measuring the delay of the camera. It should be noted that the display device may be an electronic device such as a mobile phone, a tablet computer, or a computer having a clock display function and a screen display function, for example, if the display device is a computer, an electronic clock in the computer may be the clock, a display screen of the computer may be the first display screen and/or the second display screen, and a Central Processing Unit (CPU) in the computer may be the operation Processing Unit.
Furthermore, because the electronic devices such as mobile phones, tablet computers, and the like are usually provided with corresponding screen capture units or screen capture units, the screen capture units or screen capture units on the electronic devices such as computers can also be used as the camera capture units, which can further reduce the devices required for implementing the present invention, i.e., the present invention can be implemented by only one computer with a display and with computing capability and screen capture functions, and thus, the present invention is not described in detail herein.
Preferably, the acquiring a current time presented in the clock display interface and a shooting time presented in the clock display interface pattern in the first image may further include:
acquiring a second image, wherein the second image is an image obtained by image acquisition of the current time presented in the clock display interface;
based on image processing, the current time is acquired from the second image, and the shooting time is acquired from the first image.
Fig. 13 is a schematic diagram of a second possible position of the image capturing unit according to the embodiment of the present invention. Specifically, as can be seen from fig. 13, in order to ensure the sharpness of the second image, the image pickup unit may be generally placed right in front of the display apparatus. The display device shown in fig. 13 integrates a corresponding clock, a first display screen, and an arithmetic processing unit.
It should be noted that, in the embodiment of the present invention, the data used for calculating the delay time of the camera to be measured is only the shooting time and the current time, and since the first image is obtained by the camera to be measured before, the corresponding shooting time can be obtained by directly performing image processing on the first image through the operation processing unit without performing image acquisition on the shooting time presented in the clock display interface pattern in the first image again. Therefore, at this time, the image of the current time presented in the clock display interface can be acquired only through the image pickup unit, so that the operation processing unit performs image processing on the second image to obtain the corresponding current time, thereby reducing the range of shooting by the image pickup unit and saving the internal space of the image pickup unit and the corresponding display device.
That is to say, in the embodiment of the present invention, the image capturing unit may capture only the first display area of the display device, in addition to simultaneously capturing the first display area and the second display area of the display screen of the display device, so that the cost can be further reduced and the resources can be saved.
Preferably, the acquiring a current time presented in the clock display interface and a shooting time presented in the clock display interface pattern in the first image may further include:
the current time is collected from an electronic clock inside the clock, and the shooting time is collected from the first image based on image processing.
The acquiring the current time from the electronic clock inside the clock may include:
sending a current time acquisition instruction to the clock, and receiving the current time in the electronic clock inside the clock returned by the clock; and/or the presence of a gas in the gas,
and directly accessing an electronic clock inside the clock and acquiring the current time in the electronic clock.
Similarly, since the first image is obtained by the camera to be tested before, the corresponding shooting time can be obtained by directly performing image processing on the first image through the operation processing unit without performing image acquisition on the shooting time presented in the clock display interface pattern in the first image again; moreover, at this time, the arithmetic processing unit can also directly acquire the current time presented in the clock display interface, so that it is not necessary to use a corresponding image capturing unit to capture the first display area of the display device, that is, it is not necessary to acquire an image of the current time presented in the clock display interface by using the corresponding image capturing unit.
That is to say, in the embodiment of the present invention, in addition to setting a corresponding image capturing unit to obtain an image of the current time presented in the clock display interface to obtain a corresponding second image, and acquiring the corresponding current time from the second image based on image processing by the operation processing unit, the current time presented in the clock display interface may be directly obtained by the operation processing unit without setting the corresponding image capturing unit, so that not only are the number of times of shooting reduced, but also the testing efficiency of the camera delay is improved, the cost is reduced, and the resources are saved.
Specifically, determining the delay of the camera to be measured according to the current time and the shooting time may include:
calculating a difference between the current time and the shooting time;
and taking the difference value as the delay of the camera to be detected.
Still taking the above example as an example, assuming that the shooting time acquired by the arithmetic processing unit is 01:12:23 and the current time is 01:23:45, the time delay of the camera to be measured can be 11 minutes and 22 seconds, which is not described in detail herein.
It should be noted that, in the embodiment of the present invention, the reading function of the display device may be used to read the shooting time and the current time, and the calculation function of the display device may be used to determine the delay time of the camera to be measured, so that the problems of low accuracy and low efficiency caused by visual errors and reaction errors may not exist; in addition, the whole process does not need any manpower, so that the determination cost of time delay can be reduced, and the manpower resource is saved.
In addition, in the embodiment of the present invention, after the corresponding delay is obtained through calculation, the delay may be displayed according to a set requirement, for example, the delay may be displayed on a display screen of the arithmetic processing unit, or the delay may be displayed on a display screen of the display device. It should be noted that, of course, the delay time may also be played back through a corresponding voice playing unit, where the voice playing unit may be independently disposed outside the display device and may be connected to the arithmetic processing unit, and the connection mode may include a wired communication mode and/or a wireless communication mode; the voice playing unit may also be integrated in the display device, which is not described in detail herein.
Further, after the delay of the camera to be tested is determined, a change trend of the delay of the camera to be tested along with time can be determined based on the delay, as shown in fig. 14, which is a schematic diagram of a relationship between the delay of the camera to be tested and the time in the embodiment of the present invention. Specifically, as can be seen from fig. 14, as time increases, the delay of the camera to be tested becomes larger gradually, so that a corresponding reference and basis can be provided for the user to select the camera. For example, when a user purchases a camera, the user may determine that the performance of the camera is not good if the delay of the camera is found to increase greatly with the increase of the use time; on the contrary, if the delay of the camera is found to be slightly increased along with the increase of the use time, the user may determine that the performance of the camera is better, which is not described in detail herein.
The embodiment of the invention provides a method for testing the time delay of a camera, which can acquire a first image of a clock display interface, wherein the first image is obtained by acquiring an image of the clock display interface by using the camera to be tested; when the camera to be tested outputs the first image, the current time presented in the clock display interface is collected, and the time presented in the clock display interface pattern is collected from the first image and is taken as shooting time; and then, determining the delay of the camera to be detected according to the current moment and the shooting moment. Compared with the prior art, in the embodiment of the invention, the shooting time for shooting and the current time of the shot image output by the camera to be tested do not need to be manually determined, the corresponding stopwatch does not need to be manually pressed, and the time difference between the current time and the shooting time does not need to be manually calculated, so that the problems of low accuracy and low efficiency caused by human visual errors and reaction errors do not exist; in addition, in the embodiment of the invention, the accurate determination of the camera delay can be realized without using more human resources, so that the waste of resources can be reduced, and the cost of delay determination is reduced. The method solves the problems of lower accuracy, lower efficiency and more serious resource waste existing in the existing method for testing the delay of the camera.
Example two:
based on the same inventive concept as the first embodiment of the present invention, a second embodiment of the present invention provides a device for testing camera delay, as shown in fig. 15, which is a schematic structural diagram of the device for testing camera delay described in the second embodiment of the present invention. Specifically, as shown in fig. 15, the apparatus for testing camera delay according to the second embodiment of the present invention may include:
the acquiring module 151 may be configured to acquire a first image of a clock display interface, where the first image is an image obtained by acquiring an image of the clock display interface by using a camera to be tested;
the acquisition module 152 may be configured to acquire a current time presented in the clock display interface when the camera to be tested outputs the first image, and acquire a time presented in a clock display interface pattern from the first image as a shooting time;
the determining module 153 is configured to determine the delay of the camera to be measured according to the current time and the shooting time.
The acquisition module 152 may include a corresponding extraction subunit (not shown in the figure), configured to extract the current time from the clock display interface and extract the shooting time from the first image; the determining module 153 may include a corresponding operation subunit (not shown in the figure), configured to calculate a corresponding delay according to the current time and the shooting time. Of course, the determining module 153 may further include a corresponding display subunit (not shown) for displaying the delay time. It should be noted that the extracting subunit, the calculating subunit, and the displaying subunit may be integrated into corresponding control logic, which is not described herein again.
That is to say, in the embodiment of the present invention, an obtaining module may be included, where the obtaining module is configured to obtain a first image of a clock display interface, where the first image is an image obtained by obtaining an image of the clock display interface by using a camera to be tested; the acquisition module is used for acquiring the current time presented in the clock display interface when the camera to be detected outputs the first image, and acquiring the time presented in the clock display interface pattern from the first image as the shooting time; and the determining module is used for determining the time delay of the camera to be detected according to the current time and the shooting time. Compared with the prior art, in the embodiment of the invention, the shooting time for shooting and the current time of the shot image output by the camera to be tested do not need to be manually determined, the corresponding stopwatch does not need to be manually pressed, and the time difference between the current time and the shooting time does not need to be manually calculated, so that the problems of low accuracy and low efficiency caused by human visual errors and reaction errors do not exist; in addition, in the embodiment of the invention, the accurate determination of the camera delay can be realized without using more human resources, so that the waste of resources can be reduced, and the cost of delay determination is reduced. The method solves the problems of lower accuracy, lower efficiency and more serious resource waste existing in the existing method for testing the delay of the camera.
Specifically, the acquiring module 152 may be specifically configured to acquire a second image, and acquire the current time and the shooting time from the second image based on image processing, where the second image is an image obtained by image-acquiring the current time displayed in the clock display interface and the shooting time displayed in the clock display interface pattern in the first image.
It should be noted that the acquisition module 152 may generally perform the acquisition operation on the second image based on the camera unit in the acquisition module 152. The camera unit can be any camera to be tested different from the camera to be tested, and the specification parameters of the camera unit can be the same as or different from those of the camera to be tested.
Optionally, the acquiring module 152 may be further specifically configured to acquire a second image, acquire the current time from the second image based on image processing, and acquire the shooting time from the first image, where the second image is an image obtained by image-acquiring the current time presented in the clock display interface. .
Optionally, the acquiring module 152 may be further specifically configured to acquire the current time from an electronic clock inside the clock, and acquire the shooting time from the first image based on image processing.
Specifically, the determining module 153 may be specifically configured to calculate a difference between the current time and the shooting time, and use the difference as the delay of the camera to be tested.
Optionally, the apparatus for testing camera latency may further include a dividing module 154:
the dividing module 154 may be configured to divide the display screen of the display device into a plurality of display areas before acquiring the first image of the clock display interface, where the plurality of display areas include a first display area and a second display area;
the first display area is used for displaying the clock display interface, and the second display area is used for displaying the first image.
The second embodiment of the invention provides a device for testing the time delay of a camera, which can comprise an acquisition module for acquiring a first image of a clock display interface, wherein the first image is obtained by acquiring the image of the clock display interface by using the camera to be tested; the acquisition module is used for acquiring the current time presented in the clock display interface when the camera to be detected outputs the first image, and acquiring the time presented in the clock display interface pattern from the first image as the shooting time; and the determining module is used for determining the time delay of the camera to be detected according to the current time and the shooting time. Compared with the prior art, in the embodiment of the invention, the shooting time for shooting and the current time of the shot image output by the camera to be tested do not need to be manually determined, the corresponding stopwatch does not need to be manually pressed, and the time difference between the current time and the shooting time does not need to be manually calculated, so that the problems of low accuracy and low efficiency caused by human visual errors and reaction errors do not exist; in addition, in the embodiment of the invention, the accurate determination of the camera delay can be realized without using more human resources, so that the waste of resources can be reduced, and the cost of delay determination is reduced. The method solves the problems of lower accuracy, lower efficiency and more serious resource waste existing in the existing method for testing the delay of the camera.
Example three:
a third embodiment of the present invention provides a computing device, as shown in fig. 16, which is a schematic structural diagram of the computing device in the third embodiment of the present invention. The computing device may be specifically a desktop computer, a portable computer, a smart phone, a tablet computer, a Personal Digital Assistant (PDA), and the like. Specifically, the computing device described in the embodiments of the present invention may include a Central Processing Unit (CPU) 1601, a memory 1602, an input device 1603, an output device 1604, and the like, wherein the input device 1603 may include a keyboard, a mouse, a touch screen, and the like, and the output device 1604 may include a Display device, such as a Liquid Crystal Display (LCD), a Cathode Ray Tube (CRT), and the like.
The memory 1602 may include a Read Only Memory (ROM) and a Random Access Memory (RAM), and provides the central processing unit 1601 with program instructions and data stored in the memory 1602. In an embodiment of the present invention, the memory 1602 may be used for storing a program of a method for testing camera latency.
The central processing unit 1601 is operable to execute, by calling the program instructions stored in the memory 1602, the following steps in accordance with the obtained program instructions: acquiring a first image of a clock display interface, wherein the first image is an image obtained by acquiring an image of the clock display interface by using a camera to be tested; when the camera to be tested outputs the first image, acquiring the current time presented in the clock display interface, and acquiring the time presented in the clock display interface pattern from the first image as the shooting time; and determining the delay of the camera to be detected according to the current moment and the shooting moment.
Example four:
a fourth embodiment of the present invention provides a computer storage medium, configured to store computer program instructions for the computing device, where the computer program instructions include a program for executing the method for testing camera latency.
The computer storage media may be any available media or data storage device that can be accessed by a computer, including, but not limited to, magnetic memory (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical memory (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor memory (e.g., ROMs, EPROMs, EEPROMs, non-volatile memory (NAND FLASH), Solid State Disks (SSDs)), etc.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus (device), or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (devices) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (12)
1. A method for testing camera delay is characterized by comprising the following steps:
acquiring a first image of a clock display interface, wherein the first image is an image obtained by acquiring an image of the clock display interface by using a camera to be tested;
when the camera to be tested outputs the first image, acquiring the current time presented in the clock display interface, and acquiring the time presented in the clock display interface pattern from the first image as the shooting time;
and determining the delay of the camera to be detected according to the current moment and the shooting moment.
2. The method of testing camera latency of claim 1, wherein capturing a current time presented in the clock display interface and capturing a time presented in a clock display interface pattern from the first image as a shot time comprises:
acquiring a second image, wherein the second image is an image obtained by image acquisition of the current time presented in the clock display interface and the shooting time presented in the clock display interface pattern in the first image;
and acquiring the current moment and the shooting moment from the second image based on image processing.
3. The method of testing camera latency of claim 1, wherein capturing a current time presented in the clock display interface and capturing a time presented in a clock display interface pattern from the first image is a capture time, further comprising:
acquiring a second image, wherein the second image is an image obtained by image acquisition of the current time presented in the clock display interface;
based on image processing, the current time is acquired from the second image, and the shooting time is acquired from the first image.
4. The method of testing camera latency of claim 1, wherein capturing a current time presented in the clock display interface and capturing a time presented in a clock display interface pattern from the first image is a capture time, further comprising:
the current time is collected from an electronic clock inside the clock, and the shooting time is collected from the first image based on image processing.
5. The method for testing camera delay of claim 1, wherein determining the delay of the camera to be tested according to the current time and the shooting time comprises:
calculating a difference between the current time and the shooting time;
and taking the difference value as the delay of the camera to be detected.
6. The method for testing camera delay of any one of claims 1 to 5, wherein before acquiring the first image of the clock display interface, the method further comprises:
dividing a display screen of a display device into a plurality of display areas, wherein the plurality of display areas comprise a first display area and a second display area;
the first display area is used for displaying the clock display interface, and the second display area is used for displaying the first image.
7. A device for testing camera delay, comprising:
the device comprises an acquisition module, a display module and a display module, wherein the acquisition module is used for acquiring a first image of a clock display interface, and the first image is obtained by utilizing a camera to be tested to acquire the image of the clock display interface;
the acquisition module is used for acquiring the current time presented in the clock display interface when the camera to be detected outputs the first image, and acquiring the time presented in the clock display interface pattern from the first image as the shooting time;
and the determining module is used for determining the delay of the camera to be detected according to the current moment and the shooting moment.
8. The apparatus for testing camera delay of claim 7,
the acquisition module is specifically configured to acquire a second image, and acquire the current time and the shooting time from the second image based on image processing, where the second image is an image obtained by image-acquiring the current time displayed in the clock display interface and the shooting time displayed in the clock display interface pattern in the first image.
9. The apparatus for testing camera delay of claim 7,
the acquisition module is further specifically configured to acquire a second image, acquire the current time from the second image based on image processing, and acquire the shooting time from the first image, where the second image is an image obtained by image-acquiring the current time displayed in the clock display interface.
10. The apparatus for testing camera delay of claim 7,
the acquisition module is further specifically configured to acquire the current time from an electronic clock inside the clock, and acquire the shooting time from the first image based on image processing.
11. The apparatus for testing camera delay of claim 7,
the determining module is specifically configured to calculate a difference between the current time and the shooting time, and use the difference as the delay of the camera to be detected.
12. The apparatus for testing camera delay of any one of claims 7 to 11, further comprising a dividing module:
the dividing module is used for dividing a display screen of the display device into a plurality of display areas before acquiring a first image of a clock display interface, wherein the plurality of display areas comprise a first display area and a second display area;
the first display area is used for displaying the clock display interface, and the second display area is used for displaying the first image.
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