CN114143407B - Remote real-time preview realization device, method and device and readable storage medium - Google Patents
Remote real-time preview realization device, method and device and readable storage medium Download PDFInfo
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- CN114143407B CN114143407B CN202111413198.2A CN202111413198A CN114143407B CN 114143407 B CN114143407 B CN 114143407B CN 202111413198 A CN202111413198 A CN 202111413198A CN 114143407 B CN114143407 B CN 114143407B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00127—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
- H04N1/00132—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture in a digital photofinishing system, i.e. a system where digital photographic images undergo typical photofinishing processing, e.g. printing ordering
- H04N1/00161—Viewing or previewing
- H04N1/00164—Viewing or previewing at a remote location
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00127—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
- H04N1/00249—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a photographic apparatus, e.g. a photographic printer or a projector
- H04N1/00265—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a photographic apparatus, e.g. a photographic printer or a projector with a photographic printing apparatus
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Abstract
The invention provides a device, a method, a device and a readable storage medium for realizing remote real-time preview, which comprise the following steps: acquiring a current acquired original image; calculating the current transmission rate; performing thumbnail processing on the original image according to the current transmission rate and the image caching condition in the image caching pool, generating a thumbnail corresponding to the image quality, and storing the original image and the current thumbnail in the image caching pool; extracting thumbnail to be transmitted from the image cache pool according to the current transmission rate; and sending the extracted thumbnail to a remote control terminal through a wireless receiving and transmitting module, so that the remote control terminal displays and previews images according to the received thumbnail. The remote previewing device aims at solving the problems that real-time previewing cannot be achieved by the remote previewing device in the prior art, and phenomena of unsmooth, delay and low image quality still occur in the previewing process.
Description
Technical Field
The invention relates to the field of intelligent office, in particular to a device, a method, a device and a readable storage medium for realizing remote real-time preview.
Background
Along with the development of science and technology and the improvement of living standard, photo printers are more and more widely used, the variety of photo printers with functions of camera view finding, screen display and the like is not poor, and the connection mode of the photo printers and terminals is also diversified. When a photo printer in the prior art is equipped with a camera sensor, a user often hopes to remotely preview in real time through a mobile phone or other terminals and remotely operate a remote shutter of the photo printer, but the photo printer which can be remotely operated in the market at present is connected by Bluetooth or streaming transmission such as H264, but the streaming transmission such as Bluetooth or H264 can cause the phenomenon that the device cannot realize real-time preview, and the phenomena of unsmooth, delay and low image quality can also occur in the process of real-time preview.
In view of this, the present application has been proposed.
Disclosure of Invention
Accordingly, the present invention is directed to a device, a method, a device, and a readable storage medium for implementing remote real-time preview, which can effectively solve the problems that the remote preview device in the prior art cannot implement real-time preview, and the preview process is not smooth, delayed, and has low image quality.
The invention discloses a remote real-time preview realization method, which is applied to a photo printer with a camera, and comprises the following steps:
acquiring a current acquired original image;
calculating the current transmission rate;
Adjusting the thumbnail strategy and the transmission strategy of the image according to the current transmission rate and the image caching condition in the image caching pool; the thumbnail strategy is used for influencing the quality of thumbnail images generated by thumbnail of the original image; the transmission strategy is used for influencing the transmission sequence and the transmission frame rate of the thumbnail;
Performing thumbnail processing on the original image according to the thumbnail strategy to generate a corresponding thumbnail, and simultaneously storing the original image and the current thumbnail into an image cache pool;
And extracting the thumbnail to be transmitted from the image cache pool according to the transmission strategy, and sending the extracted thumbnail to a remote control terminal through a wireless receiving and transmitting module, so that the remote control terminal displays and previews the image according to the received thumbnail.
Preferably, the thumbnail strategy and the transmission strategy of the image are adjusted according to the current transmission rate and the image caching condition in the image caching pool, specifically:
When the current transmission rate is detected to be smaller than the maximum transmission rate of the wireless transceiver module, improving the image quality of the generated thumbnail or improving the transmission frame rate of the thumbnail in the image cache pool;
when the current transmission rate is detected to be close to the maximum transmission rate of the wireless transceiver module, and the current thumbnail cached in the image cache pool is larger than a set value, reducing the image quality of the generated thumbnail or reducing the transmission frame rate of the thumbnail in the image cache pool.
Preferably, the thumbnail strategy and the transmission strategy of the image are adjusted according to the current transmission rate and the image buffering condition in the image buffering pool, and the method further comprises the following steps:
when the fact that the current transmission rate is not reduced compared with the transmission rate at the previous moment is detected, extracting a thumbnail at the head of an image cache pool queue as a thumbnail to be transmitted;
When detecting that the current transmission rate is reduced compared with the transmission rate at the last moment, extracting the current thumbnail as the thumbnail to be transmitted, and discarding the undelivered thumbnail cached in the image cache pool.
Preferably, a printing instruction returned by the remote control terminal according to the currently displayed thumbnail is received;
and acquiring an original image corresponding to the currently displayed thumbnail according to the printing instruction, and printing the original image.
Preferably, receiving a picture transmission instruction returned by the remote control terminal according to the currently displayed thumbnail;
And acquiring an original image corresponding to the currently displayed thumbnail according to the image transmission instruction, and transmitting the original image to the remote control terminal.
Preferably, the wireless transceiver module is a bluetooth device.
The invention also provides a remote real-time preview realization device, which comprises:
the image acquisition unit is used for acquiring the original image acquired currently;
a transmission rate calculation unit for calculating a current transmission rate;
The image adjusting unit is used for carrying out thumbnail processing on the original image according to the current transmission rate and the image caching condition in the image caching pool, generating a thumbnail corresponding to the image quality, and storing the original image and the current thumbnail in the image caching pool;
The image confirming unit is used for extracting the thumbnail to be transmitted from the image cache pool according to the current transmission rate;
and the thumbnail transmission unit is used for transmitting the extracted thumbnail to a remote control terminal through the wireless receiving and transmitting module so that the remote control terminal displays images and previews according to the received thumbnail.
The invention also provides a remote real-time preview implementation device comprising a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, the processor implementing a remote real-time preview implementation method according to any one of the above when executing the computer program.
The invention also provides a readable storage medium storing a computer program executable by a processor of a device in which the storage medium is located to implement a remote real-time preview implementation method as described in any one of the above.
In summary, after the current collected image is obtained, the thumbnail is correspondingly adjusted according to the calculated image transmission rate and the caching condition of the image and stored in the image caching pool, the thumbnail with transmission is determined according to the current image transmission rate and sent to the remote control terminal through the wireless transceiver module, so that the problems that the remote preview device in the prior art cannot realize real-time preview, and phenomena of unsmooth, delay and low image quality still occur in the preview process are solved.
Drawings
Fig. 1 is a flow chart of a remote real-time preview implementation method according to an embodiment of the present invention.
Fig. 2 is a schematic flow chart of a remote real-time preview implementation device according to an embodiment of the present invention.
Fig. 3 is a schematic block diagram of a remote real-time preview implementation device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of 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, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1, a first embodiment of the present invention provides a remote real-time preview implementation method, which may be executed by a remote real-time preview implementation device (hereinafter referred to as implementation device), and in particular, by one or more processors in the implementation device, to implement the following steps:
s101, acquiring an original image acquired currently.
In particular, in this embodiment, the implementation device may be a printing device, in particular, a photo printer with a camera.
In this embodiment, the implementation device performs live view through the camera, and converts the view data into the original image with the specified size.
S102, calculating the current transmission rate.
Specifically, in this embodiment, the image collected by the implementation device may be sent to a remote control terminal through a wireless transceiver module built in the implementation device, for example, a mobile phone, a computer, etc. located at a remote location, where the remote control terminal may preview or display the image according to the received image.
The implementation device performs image transmission and image acquisition, wherein the image essentially consists of a byte stream, one byte is equal to eight binary digits, the binary information digit transmitted per second can be calculated according to a formula s=1/tlog2N, the transmission byte number of unit time can be obtained according to a calculation result, and the transmission rate of the currently transmitted image can be obtained, wherein T is the width (full width code) of a digital pulse signal or the unit of repetition period (return-to-zero code) is second, and N is the number of discrete values taken by one code element.
S103, adjusting an image thumbnail strategy and a transmission strategy according to the current transmission rate and the image caching condition in the image caching pool; the thumbnail strategy is used for influencing the quality of thumbnail images generated by thumbnail of the original image; the transmission strategy is used for influencing the transmission sequence and the transmission frame rate of the thumbnail.
In this embodiment, some wireless transceiver devices have limited transmission rate due to their own protocol or due to network reasons. Taking the wireless transceiver as Bluetooth as an example, the data size of a normal high-definition image can reach several M or more than ten M, and when the original image is transmitted, the transmitted data size is larger, so that larger display delay can occur at a remote control terminal. For this reason, the present embodiment does not directly transmit the artwork to a remote control terminal, but generates a thumbnail with a relatively small data size according to the artwork, and then sends the thumbnail to the remote control terminal to realize the preview of the image. The method for transmitting the thumbnail can reduce the transmission pressure of the wireless transceiver and the delay time of the real-time preview of the image, and simultaneously increase the smoothness of the real-time preview of the image.
However, the thumbnails also have different sizes and image qualities, the better the image quality, the larger the data amount thereof, the better the display effect of the preview, but the higher the transmission requirement, and the worse the image quality, the smaller the data amount thereof, the worse the display effect of the preview, but the lower the transmission requirement.
For this reason, in order to obtain a relatively reasonable image quality, the embodiment adjusts the thumbnail strategy of the image and the transmission strategy according to the current transmission rate and the image buffering condition in the image buffering pool.
Specifically, in the present embodiment:
And when the current transmission rate is detected to be smaller than the maximum transmission rate of the wireless transceiver module, improving the image quality of the generated thumbnail or improving the transmission frame rate of the thumbnail in the image cache pool.
And when the current transmission rate is detected to be close to the maximum transmission rate of the wireless transceiver module and the current thumbnail cached in the image cache pool is larger than a set value, reducing the image quality of the generated thumbnail or reducing the transmission frame rate of the thumbnail in the image cache pool. And dynamically adjusting the image quality and the transmission frame rate of the thumbnail according to the detected current transmission rate, and increasing the quality of the previewed picture while considering the smoothness of the real-time preview.
Furthermore, if the transmission rate is generally decreasing, more and more thumbnail images to be transmitted are inevitably accumulated in the image buffer Chi Naji, and thus the preview image displayed at the remote control terminal is not a real-time image. To this end, in some preferred embodiments, step S103 further comprises:
when the fact that the current transmission rate is not reduced compared with the transmission rate at the previous moment is detected, extracting a thumbnail at the head of an image cache pool queue as a thumbnail to be transmitted;
When detecting that the current transmission rate is reduced compared with the transmission rate at the last moment, extracting the current thumbnail as the thumbnail to be transmitted, and discarding the undelivered thumbnail cached in the image cache pool.
S104, performing thumbnail processing on the original image according to the thumbnail strategy, generating a corresponding thumbnail, and storing the original image and the current thumbnail in an image cache pool.
S105, extracting the thumbnail to be transmitted from the image cache pool according to the transmission strategy, and sending the extracted thumbnail to a remote control terminal through a wireless transceiver module, so that the remote control terminal displays and previews the image according to the received thumbnail.
In this embodiment, after determining the thumbnail policy and the transmission policy, the thumbnail processing may be performed on the original image to obtain the corresponding thumbnail. And then comparing the current transmission rate with the transmission rate at the previous moment according to the transmission strategy, determining the thumbnail to be transmitted currently, extracting the determined thumbnail to be transmitted and sending the thumbnail to the remote control terminal through the wireless transceiver module.
And after receiving the image data of the currently transmitted thumbnail, the remote control terminal analyzes and decompresses the image data, and displays the decompressed image data so as to realize real-time display and preview of the image. According to the transmission rate, the quality of image transmission is dynamically adjusted, and even when the picture changes rapidly, a snowflake screen does not appear.
In one possible embodiment of the invention, a printing instruction returned by the remote control terminal according to the currently displayed thumbnail is received;
and acquiring an original image corresponding to the currently displayed thumbnail according to the printing instruction, and printing the original image.
Specifically, in this embodiment, the remote control terminal compresses and encapsulates the image data to be printed, and transmits the compressed and encapsulated image data to the implementation device together with the print command, where the implementation device performs a corresponding operation response according to the command, and the remote control terminal may further send a shutter command to remotely control the camera to shoot; and sending a parameter instruction, and performing remote parameter setting and other operations.
In one possible embodiment of the present invention, the wireless transceiver module may be a bluetooth device.
Specifically, in the present embodiment, bluetooth technology is a global specification for wireless data and voice communications, which is a special short-range wireless technology connection that establishes a communication environment for fixed and mobile devices based on a low-cost short-range wireless connection. Bluetooth enables some current portable mobile devices and computer devices to connect to the internet without a cable and can be wirelessly connected to the internet, which is a small-range wireless connection technology capable of realizing convenient, fast, flexible, safe, low-cost, low-power-consumption data communication and voice communication between devices, so it is one of the mainstream technologies for realizing wireless personal area network communication.
Referring to fig. 3, a second embodiment of the present invention provides a remote real-time preview implementation device, which includes:
the image acquisition unit is used for acquiring the original image acquired currently;
a transmission rate calculation unit for calculating a current transmission rate;
The image adjusting unit is used for adjusting the thumbnail strategy and the transmission strategy of the image according to the current transmission rate and the image caching condition in the image caching pool; the thumbnail strategy is used for influencing the quality of thumbnail images generated by thumbnail of the original image; the transmission strategy is used for influencing the transmission sequence and the transmission frame rate of the thumbnail;
The image thumbnail unit performs thumbnail processing on the original image according to the thumbnail strategy to generate a corresponding thumbnail, and stores the original image and the current thumbnail into an image cache pool;
and the thumbnail transmission unit extracts the thumbnail to be transmitted from the image cache pool according to the transmission strategy, and sends the extracted thumbnail to a remote control terminal through a wireless transceiver module, so that the remote control terminal displays and previews the image according to the received thumbnail.
A third embodiment of the present invention provides a remote real-time preview implementation apparatus, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, the processor implementing a remote real-time preview implementation method according to any one of the above when executing the computer program.
A fourth embodiment of the present invention provides a readable storage medium storing a computer program executable by a processor of a device in which the storage medium is located to implement a remote live preview implementation method as described in any one of the above.
Illustratively, the computer programs described in the third and fourth embodiments of the present invention may be divided into one or more modules, which are stored in the memory and executed by the processor to complete the present invention. The one or more modules may be a series of computer program instruction segments capable of performing the specified functions, for describing the execution of the computer program in the implementation of a remote real-time preview implementation device. For example, the device described in the second embodiment of the present invention.
The Processor may be a central processing unit (Central Processing Unit, CPU), other general purpose Processor, digital signal Processor (DIGITAL SIGNAL Processor, DSP), application SPECIFIC INTEGRATED Circuit (ASIC), off-the-shelf Programmable gate array (Field-Programmable GATE ARRAY, FPGA) or other Programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, which is a control center of the one remote live preview implementation method, and which connects the various parts of the entire implementation to the one remote live preview implementation method using various interfaces and lines.
The memory may be used to store the computer program and/or the module, and the processor may implement various functions of a remote real-time preview implementation method by running or executing the computer program and/or the module stored in the memory and invoking data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program (such as a sound playing function, a text conversion function, etc.) required for at least one function, and the like; the storage data area may store data (such as audio data, text message data, etc.) created according to the use of the cellular phone, etc. In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as a hard disk, memory, plug-in hard disk, smart memory card (SMART MEDIA CARD, SMC), secure Digital (SD) card, flash memory card (FLASH CARD), at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device.
Wherein the modules may be stored in a computer readable storage medium if implemented in the form of software functional units and sold or used as a stand alone product. Based on this understanding, the present invention may implement all or part of the flow of the method of the above embodiment, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and the computer program may implement the steps of each method embodiment described above when executed by a processor. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the computer readable medium contains content that can be appropriately scaled according to the requirements of jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is subject to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.
It should be noted that the above-described apparatus embodiments are merely illustrative, and the units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, in the drawings of the embodiment of the device provided by the invention, the connection relation between the modules represents that the modules have communication connection, and can be specifically implemented as one or more communication buses or signal lines. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention.
Claims (8)
1. The method for realizing the remote real-time preview is characterized by comprising the following steps of:
acquiring a current acquired original image;
calculating the current transmission rate;
Adjusting the thumbnail strategy and the transmission strategy of the image according to the current transmission rate and the image caching condition in the image caching pool; the thumbnail strategy is used for influencing the quality of thumbnail images generated by thumbnail of the original image; the transmission strategy is used for influencing the transmission sequence and the transmission frame rate of the thumbnail; when the current transmission rate is detected to be smaller than the maximum transmission rate of the wireless transceiver module, improving the image quality of the generated thumbnail or improving the transmission frame rate of the thumbnail in the image cache pool; when detecting that the current transmission rate is reduced compared with the transmission rate at the last moment, extracting a current thumbnail as a thumbnail to be transmitted, and discarding the undelivered thumbnail cached in the image cache pool;
Performing thumbnail processing on the original image according to the thumbnail strategy to generate a corresponding thumbnail, and simultaneously storing the original image and the current thumbnail into an image cache pool;
And extracting the thumbnail to be transmitted from the image cache pool according to the transmission strategy, and sending the extracted thumbnail to a remote control terminal through a wireless receiving and transmitting module, so that the remote control terminal displays and previews the image according to the received thumbnail.
2. The method for implementing remote real-time preview according to claim 1, wherein the thumbnail strategy and the transmission strategy of the image are adjusted according to the current transmission rate and the image buffering condition in the image buffering pool, further comprising:
And when detecting that the current transmission rate is not reduced compared with the transmission rate at the last moment, extracting the thumbnail at the head of the image cache pool queue as the thumbnail to be transmitted.
3. The method for implementing remote live preview as defined in claim 1, wherein,
Receiving a printing instruction returned by the remote control terminal according to the currently displayed thumbnail;
and acquiring an original image corresponding to the currently displayed thumbnail according to the printing instruction, and printing the original image.
4. The method for implementing remote live preview as defined in claim 1, wherein,
Receiving a picture transmission instruction returned by the remote control terminal according to the currently displayed thumbnail;
And acquiring an original image corresponding to the currently displayed thumbnail according to the image transmission instruction, and transmitting the original image to the remote control terminal.
5. The method for implementing remote real-time preview according to claim 1, wherein said wireless transceiver module is a bluetooth device.
6. A remote real-time preview implementation apparatus, comprising:
the image acquisition unit is used for acquiring the original image acquired currently;
a transmission rate calculation unit for calculating a current transmission rate;
The image adjusting unit is used for adjusting the thumbnail strategy and the transmission strategy of the image according to the current transmission rate and the image caching condition in the image caching pool; the thumbnail strategy is used for influencing the quality of thumbnail images generated by thumbnail of the original image; the transmission strategy is used for influencing the transmission sequence and the transmission frame rate of the thumbnail; when the current transmission rate is detected to be smaller than the maximum transmission rate of the wireless transceiver module, improving the image quality of the generated thumbnail or improving the transmission frame rate of the thumbnail in the image cache pool; when detecting that the current transmission rate is reduced compared with the transmission rate at the last moment, extracting a current thumbnail as a thumbnail to be transmitted, and discarding the undelivered thumbnail cached in the image cache pool;
The image thumbnail unit performs thumbnail processing on the original image according to the thumbnail strategy to generate a corresponding thumbnail, and stores the original image and the current thumbnail into an image cache pool;
and the thumbnail transmission unit extracts the thumbnail to be transmitted from the image cache pool according to the transmission strategy, and sends the extracted thumbnail to a remote control terminal through a wireless transceiver module, so that the remote control terminal displays and previews the image according to the received thumbnail.
7. A remote live preview realization device comprising a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, the processor implementing a remote live preview realization method according to any of claims 1 to 5 when executing the computer program.
8. A readable storage medium, storing a computer program executable by a processor of a device in which the storage medium is located, for implementing a remote live preview implementation method according to any of claims 1 to 5.
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| CN110012267A (en) * | 2019-04-02 | 2019-07-12 | 深圳市即构科技有限公司 | Unmanned aerial vehicle (UAV) control method and audio/video data transmission method |
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