CN110234005A - A kind of method, apparatus, medium and the electronic equipment of video quality evaluation and test - Google Patents
A kind of method, apparatus, medium and the electronic equipment of video quality evaluation and test Download PDFInfo
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- CN110234005A CN110234005A CN201910547614.4A CN201910547614A CN110234005A CN 110234005 A CN110234005 A CN 110234005A CN 201910547614 A CN201910547614 A CN 201910547614A CN 110234005 A CN110234005 A CN 110234005A
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- 238000012360 testing method Methods 0.000 title claims abstract description 101
- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000013441 quality evaluation Methods 0.000 title claims abstract description 20
- 238000009659 non-destructive testing Methods 0.000 claims description 19
- 230000000694 effects Effects 0.000 claims description 15
- 238000004590 computer program Methods 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 6
- 238000001303 quality assessment method Methods 0.000 claims description 6
- 238000011156 evaluation Methods 0.000 abstract description 7
- 238000010835 comparative analysis Methods 0.000 abstract 1
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- 238000010586 diagram Methods 0.000 description 10
- 230000003796 beauty Effects 0.000 description 4
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
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Abstract
This application provides method, apparatus, medium and the electronic equipments of a kind of evaluation and test of video quality.The described method includes: obtaining test video file, the test video file is the homemade video file including standard graph card；The test video file is compared with standard testing item；According to the comparative analysis picture quality, video quality evaluation result is provided.The method simulates the normal video content for generating test by the combination of several equipment, does not need expensive test environment.This method substitutes the video input of primary camera by customization video source, achievees the purpose that customize test content.By the way that test scene is made into customization video, expensive test environmental structure is saved, the test function to video file can be equally played, save testing cost, improve testing efficiency, market value with higher.
Description
Technical Field
The present application relates to the field of computer technologies, and in particular, to a method, an apparatus, a medium, and an electronic device for video quality evaluation.
Background
Most hardware of the mobile phone terminal supports the camera shooting function, and the App number of the camera shooting function is tens of thousands, which is an important component of android ecology. The complete camera shooting function comprises video acquisition, encoding, decoding and other sub-modules. Each of which may have an impact on video quality.
The video quality test is a main test item of video products, and in the test, no matter the subjective test or the objective test, the video content needs to be analyzed.
Whether the video content is fit to the test or not can seriously affect the test effect. For example, if the video is tested for "color difference", the video content needs to include various standard colors (most standard is professional color card); for another example, if the video is tested for clarity, the video content needs to have analytically clear markers (MTF/SFR methods for the analytically clear markers, such as black rectangles in ISO 12233).
In general video testing, specific video content is required for specific test indexes, for example, a standard 24-color card is used in a lamp box for shooting to check color restoration and image noise. The accuracy of the video content can be ensured only by using the standard light source and the standard graphic card, and the test result is accurate enough. However, the method for building the external environment test is very expensive. The lamp box and various graphic cards are expensive, and the test item of each graphic card is single and can be rarely reused.
Disclosure of Invention
An object of the present application is to provide a method, an apparatus, a medium, and an electronic device for video quality evaluation, which can solve at least one of the above-mentioned technical problems. The specific scheme is as follows:
according to a specific implementation manner of the present application, in a first aspect, the present application provides a method for video quality evaluation, including:
acquiring a test video file, wherein the test video file is a self-made video file comprising a standard graphic card;
comparing the test video file to standard test items;
and analyzing the image quality according to the comparison, and giving a video quality evaluation result.
According to a second aspect, the present application provides an apparatus for video quality evaluation, including:
the system comprises an acquisition unit, a storage unit and a processing unit, wherein the acquisition unit is used for acquiring a test video file which is a self-made video file comprising a standard graphic card;
a comparison unit for comparing the test video file with a standard test item;
and the analysis unit is used for analyzing the image quality according to the comparison and giving out a video quality evaluation result.
According to a third aspect, there is provided a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the method for video quality assessment according to any of the first aspects.
According to a fourth aspect thereof, the present application provides an electronic device, comprising: one or more processors; a storage device for storing one or more programs which, when executed by the one or more processors, cause the one or more processors to implement the method for video quality assessment according to any of the first aspects.
Compared with the prior art, the scheme of the embodiment of the application has at least the following beneficial effects:
the application provides a method, a device, a medium and electronic equipment for evaluating video quality. The method simulates and generates standard video content for testing through the combination of several devices, and does not need expensive testing environment. The method achieves the purpose of customizing the test content by customizing the video source to replace the video input of the original camera. By making the test scene into the customized video, expensive test environment construction is saved, the test function of the video file can be played, the test cost is saved, the test efficiency is improved, and the method has higher market value.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 shows a flow diagram of a method of video quality assessment according to an embodiment of the present application;
FIG. 2 is a block diagram of elements of an apparatus for video quality assessment according to an embodiment of the present application;
fig. 3 shows a schematic diagram of an electronic device connection structure according to an embodiment of the application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all 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 application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, third, etc. may be used to describe technical names in embodiments of the present disclosure, the technical names should not be limited to the terms. These terms are only used to distinguish between technical names. For example, a first check signature may also be referred to as a second check signature, and similarly, a second check signature may also be referred to as a first check signature, without departing from the scope of embodiments of the present disclosure.
The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in the article or device in which the element is included.
Alternative embodiments of the present application are described in detail below with reference to the accompanying drawings.
A first embodiment provided by the present application is an embodiment of a method for video quality evaluation.
The embodiments of the present application will be described in detail with reference to fig. 1 to 3, wherein fig. 1 is a flowchart of a method for video quality evaluation provided by the embodiments of the present application; fig. 2 is a diagram illustrating a structure of an apparatus for video quality evaluation according to an embodiment of the present application; fig. 3 shows a schematic diagram of an electronic device connection structure according to an embodiment of the application.
The method for evaluating the video quality mainly simulates and generates standard video content for testing through the combination of the existing equipment, and tests the video file, thereby replacing an expensive testing environment.
The present disclosure records a graphic card photographed in a light box environment as video content and generates a lossless video file. Video content includes, but is not limited to: MTF/SFR cards under D65 light source, 24 color cards under D65, D75, D50, TL84, CWF and other light sources, portrait cards, and gray scale cards under transmission light source. And importing the recorded video file into the mobile phone to be used as an input video source of the live APP, and live broadcasting. And then, acquiring live video content on another terminal, corresponding to the test item according to the picture card in the content, and analyzing the image quality. When the content of the graphic card is recorded into a video file, the resolution is adjusted to be maximum; the recorded camera needs to turn off special effects, such as beauty special effects, sharpening, image enhancement, color correction, and the like, and turn off the gamma setting. The specific method comprises the following steps:
step S102: and acquiring a test video file, wherein the test video file is a self-made video file comprising a standard graphic card.
The operation of the test terminal on the video file to be tested is obtained, and the operation mode includes but is not limited to network downloading (including local downloading of live APP, downloading of a server, transmission of other terminals and the like), transmission of ports such as USB and the like.
The format of the video file includes, but is not limited to, wmv, asf, asx, rm, rmvb, mp4, avi, dat, mkv, flv, vob, etc.
And standard image cards including, but not limited to, 24 color cards, portrait cards, or gray scale cards under a transmissive light source.
Specifically, optionally, the obtaining of the test video file, where the test video file is a self-made video file including a standard graphic card, includes the following steps:
step S1021: and recording the picture card shot in the light box environment as video content and generating a nondestructive testing video file.
The lamp box environment is a device required for shooting standard pictures and is used for providing soft light required by a camera for a shot object through the lamp box. Thereby making the captured photograph closer to the primary color.
Specifically, optionally, the method for recording and generating a nondestructive test video file by using the graphic card shot in the light box environment as the video content includes the following steps:
firstly, setting a lamp box environment.
Wherein, set up lamp house environment, include: adjusting a lamp box light source, wherein the light source comprises a D65 light source, a D75 light source, a D50 light source, a TL84 light source or a CWF light source; the D65 light source is the most common artificial sunlight in standard light sources, and the color temperature of the artificial sunlight is 6500K. The D65 light source in the standard light source box simulates artificial sunlight, so that when the color effect of the object is observed indoors and in rainy days, the illumination effect which is approximately observed under the sunlight is ensured.
And adjusting a shooting graphic card, wherein the graphic card comprises a 24-color card, a portrait graphic card or a gray scale card under a transmission light source and the like.
Secondly, the resolution of the shooting camera is adjusted to be maximum, the special effect function (such as beauty special effect, sharpening, image enhancement, color correction and the like) of the camera is turned off, and/or the gamma setting is turned off.
Thirdly, the shooting picture card is recorded as video content and generates a nondestructive testing video file.
Step S1022: and putting the nondestructive testing video file into a live broadcast APP to form a live broadcast video file.
Live APP is any third party application capable of providing online video playback including, but not limited to, trembling, fast-hand, micro-video, QQ live, etc.
Optionally, the step of placing the nondestructive testing video file into a live APP to form a live video file includes the following steps:
step S10221: and importing the recorded nondestructive testing video file into a video terminal.
Optionally, the importing the recorded non-destructive test video file into a video terminal includes:
firstly, importing the recorded nondestructive testing video file into a USB acquisition card;
secondly, connecting the USB acquisition card with a USB interface of a terminal;
and thirdly, importing the data into the terminal through the USB interface.
Step S10222: and forming a live broadcast video file through the live broadcast APP of the terminal.
On android equipment, the video is guided into a live broadcast APP, and the video can be guided into the live broadcast APP in a mode of externally connecting a USB acquisition card.
And importing the video of the recorded graphic card into a USB acquisition card, and connecting the USB acquisition card with a USB interface of the android mobile phone. In order to replace the android default camera with the USB acquisition card, some android devices need to change the system, including:
1) starting up the support of UVC of the terminal system;
2) finding out equipment nodes of a native camera of the terminal;
3) modifying a driving layer to enable the equipment node of the USB acquisition card to replace the equipment node of the primary camera;
4) and modifying a hardware abstraction layer HAL, and configuring the parameters of the camera to be matched with the capability of the USB acquisition card.
Step S1023: and acquiring the live video file as a test video file.
The acquisition can be performed through another test terminal, the uploaded test video file is acquired through remote or cloud equipment, and the test is performed in an online or local downloading mode.
Step S104: the test video file is compared to standard test items.
The method of comparison includes, for example, obtaining 24 color cards, opening the 24 color cards in a video file in test software, selecting relatively uniform portions of each color of the 24 color cards, analyzing whether the selected portions are close to a standard color card value by analyzing pixel values at the selected locations, and providing a comparison curve based on the analysis.
Step S106: and analyzing the image quality according to the comparison, and giving a video quality evaluation result.
The test video file described above is analyzed, for example, by DXOMark and VCX for image quality, e.g., whether the image can show more detail in low light conditions, whether the texture level is fresher, whether the image is more sharp, whether the color is cleaner, etc.
The video testing method simulates and generates standard video content for testing through the combination of several devices, and does not need expensive testing environment. The method achieves the purpose of customizing the test content by customizing the video source to replace the video input of the original camera. By making the test scene into the customized video, expensive test environment construction is saved, the test function of the video file can be played, the test cost is saved, the test efficiency is improved, and the method has higher market value.
Corresponding to the first embodiment provided by the present application, the present application also provides a second embodiment, namely, an apparatus for video quality evaluation. The second embodiment is used to implement the method described in the first embodiment, and the portions having the same structure as the first embodiment are omitted, and the technical features having the same technical effects as the first embodiment are also omitted, and the related portions need to be referred to the corresponding descriptions of the first embodiment, and are not described herein again. The device embodiments described below are merely illustrative.
The device for evaluating the video quality mainly simulates and generates standard video content for testing through the combination of the existing equipment, and tests the video file, thereby replacing an expensive testing environment. The corresponding modules or units may be implemented by software, hardware circuit, or a combination of software and hardware, and are not limited herein.
The present disclosure records a graphic card photographed in a light box environment as video content and generates a lossless video file. Video content includes, but is not limited to: MTF/SFR cards under D65 light source, 24 color cards under D65, D75, D50, TL84, CWF and other light sources, portrait cards, and gray scale cards under transmission light source. And importing the recorded video file into the mobile phone to be used as an input video source of the live APP, and live broadcasting. And then, acquiring live video content on another terminal, corresponding to the test item according to the picture card in the content, and analyzing the image quality. When the content of the graphic card is recorded into a video file, the resolution is adjusted to be maximum; the recorded camera needs to turn off special effects, such as beauty special effects, sharpening, image enhancement, color correction, and the like, and turn off the gamma setting.
The method specifically comprises the following steps: an acquisition unit 202, a comparison unit 204, and an analysis unit 206. The method comprises the following specific steps:
the acquisition unit 202: the method is used for obtaining the test video file, wherein the test video file is a self-made video file comprising a standard graphic card.
Specifically, optionally, the obtaining unit 202 further includes: a shooting unit 2021, an uploading unit 2022, and a downloading unit 2023.
The shooting unit 2021: and recording the picture card shot in the light box environment as video content and generating a nondestructive testing video file.
The lamp box environment is a device required for shooting standard pictures and is used for providing soft light required by a camera for a shot object through the lamp box. Thereby making the captured photograph closer to the primary color.
Specifically, optionally, the shooting unit 2021 further includes:
firstly, setting a lamp box environment.
Wherein, set up lamp house environment, include: adjusting a lamp box light source, wherein the light source comprises a D65 light source, a D75 light source, a D50 light source, a TL84 light source or a CWF light source; the D65 light source is the most common artificial sunlight in standard light sources, and the color temperature of the artificial sunlight is 6500K. The D65 light source in the standard light source box simulates artificial sunlight, so that when the color effect of the object is observed indoors and in rainy days, the illumination effect which is approximately observed under the sunlight is ensured.
And adjusting a shooting graphic card, wherein the graphic card comprises a 24-color card, a portrait graphic card or a gray scale card under a transmission light source and the like.
Secondly, the resolution of the shooting camera is adjusted to be maximum, the special effect function (such as beauty special effect, sharpening, image enhancement, color correction and the like) of the camera is turned off, and/or the gamma setting is turned off.
Thirdly, the shooting picture card is recorded as video content and generates a nondestructive testing video file.
Upload unit 2022: and putting the nondestructive testing video file into a live broadcast APP to form a live broadcast video file.
Live APP is any third party application capable of providing online video playback including, but not limited to, trembling, fast-hand, micro-video, QQ live, etc.
Optionally, the uploading unit 2022 further includes:
1) and importing the recorded nondestructive testing video file into a video terminal. The method specifically comprises the following steps: firstly, importing the recorded nondestructive testing video file into a USB acquisition card; secondly, connecting the USB acquisition card with a USB interface of a terminal; and thirdly, importing the data into the terminal through the USB interface.
2) And forming a live broadcast video file through the live broadcast APP of the terminal.
On android equipment, the video is guided into a live broadcast APP, and the video can be guided into the live broadcast APP in a mode of externally connecting a USB acquisition card.
And importing the video of the recorded graphic card into a USB acquisition card, and connecting the USB acquisition card with a USB interface of the android mobile phone. In order to replace the android default camera with the USB acquisition card, some android devices need to change the system, including:
(1) starting up the support of UVC of the terminal system;
(2) finding out equipment nodes of a native camera of the terminal;
(3) modifying a driving layer to enable the equipment node of the USB acquisition card to replace the equipment node of the primary camera;
(4) and modifying a hardware abstraction layer HAL, and configuring the parameters of the camera to be matched with the capability of the USB acquisition card.
The download unit 2023: and acquiring the live video file as a test video file.
The acquisition can be performed through another test terminal, the uploaded test video file is acquired through remote or cloud equipment, and the test is performed in an online or local downloading mode.
The comparison unit 204: for comparing the test video file to standard test items.
For example, 24 color cards are obtained, the 24 color cards in the video file are opened in the test software, relatively uniform parts in all colors of the 24 color cards are selected, whether the parts are close to the values of the standard color cards or not is analyzed through analyzing the pixel values of the selected positions, and a comparison curve is given according to the analysis result.
The analysis unit 206: and the evaluation module is used for analyzing the image quality according to the comparison and giving a video quality evaluation result.
The test video file described above is analyzed, for example, by DXOMark and VCX for image quality, e.g., whether the image can show more detail in low light conditions, whether the texture level is fresher, whether the image is more sharp, whether the color is cleaner, etc.
The video test device simulates and generates standard video content for test through the combination of several devices, and does not need expensive test environment. The method achieves the purpose of customizing the test content by customizing the video source to replace the video input of the original camera. By making the test scene into the customized video, expensive test environment construction is saved, the test function of the video file can be played, the test cost is saved, the test efficiency is improved, and the method has higher market value.
The embodiment of the present application provides a third embodiment, that is, an electronic device, where the electronic device is used in a method for video quality evaluation, and the electronic device includes: at least one processor; and a memory communicatively coupled to the at least one processor; wherein,
the memory stores instructions executable by the one processor to cause the at least one processor to perform the method for video quality assessment according to the first embodiment.
The fourth embodiment of the present disclosure provides a computer storage medium for video quality evaluation, where the computer storage medium stores computer-executable instructions, and the computer-executable instructions can execute the method for video quality evaluation described in any of the above method embodiments.
Referring to fig. 3, a schematic structural diagram of an electronic device suitable for implementing an embodiment of the disclosure is shown. The terminal device in the embodiments of the present disclosure may include, but is not limited to, a mobile terminal such as a mobile phone, a notebook computer, a digital broadcast receiver, a PDA (personal digital assistant), a PAD (tablet computer), a PMP (portable multimedia player), a vehicle terminal (e.g., a car navigation terminal), and the like, and a stationary terminal such as a digital TV, a desktop computer, and the like. The electronic device shown in fig. 3 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present disclosure.
As shown in fig. 3, the electronic device may include a processing device (e.g., a central processing unit, a graphic processor, etc.) 301 that may perform various appropriate actions and processes according to a program stored in a Read Only Memory (ROM)302 or a program loaded from a storage device 308 into a Random Access Memory (RAM) 303. In the RAM 303, various programs and data necessary for the operation of the electronic apparatus are also stored. The processing device 301, the ROM 302, and the RAM 303 are connected to each other via a bus 304. An input/output (I/O) interface 305 is also connected to bus 304.
Generally, the following devices may be connected to the I/O interface 305: input devices 306 including, for example, a touch screen, touch pad, keyboard, mouse, camera, microphone, accelerometer, gyroscope, etc.; an output device 307 including, for example, a Liquid Crystal Display (LCD), a speaker, a vibrator, and the like; storage devices 308 including, for example, magnetic tape, hard disk, etc.; and a communication device 309. The communication means 309 may allow the electronic device to communicate wirelessly or by wire with other devices to exchange data. While fig. 3 illustrates an electronic device having various means, it is to be understood that not all illustrated means are required to be implemented or provided. More or fewer devices may alternatively be implemented or provided.
In particular, according to an embodiment of the present disclosure, the processes described above with reference to the flowcharts may be implemented as computer software programs. For example, embodiments of the present disclosure include a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising program code for performing the method illustrated in the flow chart. In such an embodiment, the computer program may be downloaded and installed from a network through the communication means 309, or installed from the storage means 308, or installed from the ROM 302. The computer program, when executed by the processing device 301, performs the above-described functions defined in the methods of the embodiments of the present disclosure.
It should be noted that the computer readable medium in the present disclosure can be a computer readable signal medium or a computer readable storage medium or any combination of the two. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples of the computer readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the present disclosure, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In contrast, in the present disclosure, a computer readable signal medium may comprise a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: electrical wires, optical cables, RF (radio frequency), etc., or any suitable combination of the foregoing.
The computer readable medium may be embodied in the electronic device; or may exist separately without being assembled into the electronic device.
The computer readable medium carries one or more programs which, when executed by the electronic device, cause the electronic device to: acquiring at least two internet protocol addresses; sending a node evaluation request comprising the at least two internet protocol addresses to node evaluation equipment, wherein the node evaluation equipment selects the internet protocol addresses from the at least two internet protocol addresses and returns the internet protocol addresses; receiving an internet protocol address returned by the node evaluation equipment; wherein the obtained internet protocol address indicates an edge node in the content distribution network.
Alternatively, the computer readable medium carries one or more programs which, when executed by the electronic device, cause the electronic device to: receiving a node evaluation request comprising at least two internet protocol addresses; selecting an internet protocol address from the at least two internet protocol addresses; returning the selected internet protocol address; wherein the received internet protocol address indicates an edge node in the content distribution network.
Computer program code for carrying out operations for aspects of the present disclosure may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + +, and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The units described in the embodiments of the present disclosure may be implemented by software or hardware. Where the name of a unit does not in some cases constitute a limitation of the unit itself, for example, the first retrieving unit may also be described as a "unit for retrieving at least two internet protocol addresses".
Claims (10)
1. A method for video quality assessment, comprising:
acquiring a test video file, wherein the test video file is a self-made video file comprising a standard graphic card;
comparing the test video file to standard test items;
and analyzing the image quality according to the comparison, and giving a video quality evaluation result.
2. The method of claim 1, wherein the obtaining a test video file, the test video file being a homemade video file including a standard graphic card, comprises:
recording a picture card shot in a lamp box environment as video content and generating a nondestructive test video file;
putting the nondestructive testing video file into a live broadcast APP to form a live broadcast video file;
and acquiring the live video file as a test video file.
3. The method of claim 2, wherein recording the picture card taken in a light box environment as video content and generating a non-destructive testing video file comprises:
setting a lamp box environment;
adjusting the resolution of the shooting camera to be maximum, and closing the special effect function and/or closing gamma setting of the camera;
and recording the shooting picture card as video content and generating a nondestructive testing video file.
4. The method of claim 3, wherein the setting a light box environment comprises:
adjusting a lamp box light source, wherein the light source comprises a D65 light source, a D75 light source, a D50 light source, a TL84 light source or a CWF light source;
and adjusting a shooting graphic card, wherein the graphic card comprises a 24-color card, a portrait graphic card or a gray scale card under a transmission light source.
5. The method of claim 2, wherein said placing said non-destructive testing video file into a live APP to form a live video file comprises:
importing the recorded nondestructive testing video file into a terminal;
and forming a live broadcast video file through the live broadcast APP of the terminal.
6. The method of claim 5, wherein importing the recorded non-destructive testing video file into a terminal comprises:
importing the recorded nondestructive testing video file into a USB acquisition card;
connecting the USB acquisition card with a USB interface of a terminal;
and importing the data into the terminal through the USB interface.
7. The method according to claim 6, wherein before importing the recorded non-destructive testing video file into a USB capture card, the method comprises:
starting up the support of UVC of the terminal system;
finding out equipment nodes of a native camera of the terminal;
modifying a driving layer to enable the equipment node of the USB acquisition card to replace the equipment node of the primary camera;
and modifying a hardware abstraction layer, and configuring the parameters of the camera to be matched with the capability of the USB acquisition card.
8. An apparatus for video quality evaluation, comprising:
the system comprises an acquisition unit, a storage unit and a processing unit, wherein the acquisition unit is used for acquiring a test video file which is a self-made video file comprising a standard graphic card;
a comparison unit for comparing the test video file with a standard test item;
and the analysis unit is used for analyzing the image quality according to the comparison and giving out a video quality evaluation result.
9. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the method according to any one of claims 1 to 7.
10. An electronic device, comprising:
one or more processors;
storage means for storing one or more programs which, when executed by the one or more processors, cause the one or more processors to carry out the method of any one of claims 1 to 7.
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