CN117611557A - System, method, electronic device, and medium for testing moving image response time - Google Patents
System, method, electronic device, and medium for testing moving image response time Download PDFInfo
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Abstract
The embodiment of the application provides a system, a method, electronic equipment and a medium for testing response time of a moving image, and relates to the technical field of display evaluation. Wherein, the test system of the motion image response time includes: the TDI camera is used for collecting dynamic images on the display screen to be tested and generating test image frames corresponding to the dynamic images; the dynamic image at least comprises a target object moving at a first speed at a constant speed, the acquisition period of the TDI camera is n times of the driving period of the display screen to be tested, and n is a positive integer; and the image analysis device is used for determining a fuzzy area in the test image frame and determining the moving image response time of the display screen to be tested based on the fuzzy area. According to the method and the device, a moving mechanical structure or high shooting frequency is not needed, dynamic images on the display screen are collected through the TDI camera, the moving image response time of the display screen is determined according to the output image of the TDI camera, the cost of the camera for measuring the moving image response time can be saved, and underexposure is avoided.
Description
Technical Field
The application relates to the technical field of display evaluation, in particular to a system, a method, electronic equipment and a medium for testing response time of a moving image.
Background
For the fast moving image on the display, the fast moving image remains still for a unit frame time and is displayed at a different display position from the previous frame, and since the response time of the display has a certain delay, the human eye moves at a constant speed during the process, so that the fast moving image observed by the human eye may appear to be motion blurred, which is also called motion blur.
In order to be able to specifically express the motion blur degree of a moving image, a quantized value, namely a moving image response time (Moving Picture Response Time, MPRT), is proposed. The moving image response time is an important evaluation index of the display, and the test cost for the moving image response time in the prior art is high and the test effect for the low-brightness scene is poor.
Disclosure of Invention
Embodiments of the present application provide a system, a method, an electronic device, and a medium for testing a moving image response time, so as to solve or alleviate one or more technical problems in the prior art.
According to a first aspect of embodiments of the present application, there is provided a test system for moving image response time, including:
the TDI camera is used for collecting dynamic images on the display screen to be tested and generating test image frames corresponding to the dynamic images; the dynamic image at least comprises a target object moving at a first speed at a constant speed, the acquisition period of the TDI camera is n times of the driving period of the display screen to be tested, and n is a positive integer;
and the image analysis device is used for determining a fuzzy area in the test image frame and determining the moving image response time of the display screen to be tested based on the fuzzy area.
In one embodiment, the image analysis device is specifically configured to: determining the moving direction of the target object according to the brightness of each pixel point in the test image frame; and determining a fuzzy area according to the brightness change condition of the pixel points in the moving direction.
In one embodiment, the image analysis device is specifically configured to: determining a plurality of target pixel points in the test image frame, wherein the brightness change rate between the target pixel points and the adjacent pixel points in the moving direction is larger than a preset value; an area composed of a plurality of target pixel points is determined as a blurred area.
In one embodiment, the image analysis device is specifically configured to: determining a blurring width according to the blurring region; a moving image response time is determined based on the blur width and the first speed.
In one embodiment, the TDI camera is configured to: the line scan speed is adjusted according to the lens magnification and the photosensitive element size to match the line scan speed to the first speed.
According to a second aspect of embodiments of the present application, there is provided a method for testing a moving image response time, including:
collecting a dynamic image on a display screen to be tested by using a TDI camera, and generating a test image frame corresponding to the dynamic image; the dynamic image at least comprises a target object moving at a first speed at a constant speed, the acquisition period of the TDI camera is n times of the driving period of the display screen to be tested, and n is a positive integer;
determining a blurred region in the test image frame;
and determining the moving image response time of the display screen to be tested based on the fuzzy area.
In one embodiment, determining a blur area in a test image frame includes: determining the moving direction of the target object according to the brightness of each pixel point in the test image frame; and determining a fuzzy area according to the brightness change condition of the pixel points in the moving direction.
In one embodiment, determining the blur area according to a brightness change condition of the pixel point in the moving direction includes: determining a plurality of target pixel points in the test image frame, wherein the brightness change rate between the target pixel points and the adjacent pixel points in the moving direction is larger than a preset value; an area composed of a plurality of target pixel points is determined as a blurred area.
In one embodiment, determining a moving image response time of a display screen to be tested based on a blur area includes: determining a blurring width according to the blurring region; a moving image response time is determined based on the blur width and the first speed.
In one embodiment, the method further comprises: the line scan speed of the TDI camera is adjusted based on the lens magnification and the photosensitive element size of the TDI camera to match the line scan speed to the first speed.
According to a third aspect of embodiments of the present application, there is provided an electronic device comprising at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the methods provided by any of the embodiments of the present application.
According to a fourth aspect of embodiments of the present application, there is provided a computer readable storage medium having a computer program stored therein, the computer program, when executed by a processor, implementing the method provided by any of the embodiments of the present application.
According to the test system for the moving image response time, provided by the embodiment of the application, the moving image on the display screen can be acquired through the TDI camera without using a moving mechanical structure or high shooting frequency, the moving image response time of the display screen is determined according to the output image of the TDI camera, the cost of the camera for measuring the moving image response time can be saved, and the influence of underexposure on the measurement accuracy can be avoided.
The foregoing summary is for the purpose of the specification only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present application will become apparent by reference to the drawings and the following detailed description.
Drawings
In the drawings, the same reference numerals refer to the same or similar parts or elements throughout the several views unless otherwise specified. The figures are not necessarily drawn to scale. It is appreciated that these drawings depict only some embodiments according to the disclosure and are not therefore to be considered limiting of its scope.
Fig. 1 is a schematic architecture diagram of a moving image response time testing system according to an embodiment of the present disclosure.
Fig. 2 is a schematic diagram of a test image frame according to an embodiment of the present disclosure.
Fig. 3 is a schematic view of a brightness change of a test image frame in a moving direction of a target object according to an embodiment of the present disclosure.
FIG. 4 is a schematic diagram of a display screen LC curve and convolution results per frame time for verification of test results.
Fig. 5 is a flow chart of a method of testing a moving image response time according to an embodiment of the present disclosure.
Fig. 6 is a block diagram of an electronic device used to implement an embodiment of the present application.
Detailed Description
Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present application. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.
In the description of the present specification, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The motion picture response time MPRT refers to the response speed of the display to the input signal, and is used to measure the change speed of the pixels when the display displays the dynamic video. The lower MPRT means that the less the afterimage and smear of the moving image, the higher the dynamic contrast, the better the display moving image effect.
The existing measurement of MPRT is mainly performed by a tracking camera or a high-speed camera, and the measurement principle related to the tracking camera mainly needs to enable a lens of the camera to move at a constant speed with a moving object in a display screen to be tested so as to keep relatively static, wherein one mode is a camera turning mirror scheme, namely, the lens of the camera is set to be rotatable and an acquisition position of the lens is enabled to move at a constant speed along a moving direction of the moving object in the display screen to be tested; the other mode is that the camera is placed on the mobile platform, and the moving speed of the mobile platform is set to enable the camera to move at the same speed with a moving object in the display screen to be tested.
The measurement principle of the high-speed camera is that the camera is placed at a fixed position, when a square block on a screen moves into the field of view of a lens of the camera, high-speed photographing is performed, and then a multi-frame image obtained by the high-speed photographing is subjected to subsequent processing to calculate the MPRT.
Therefore, the mechanical structure which needs to be moved is measured by the tracking camera, and the mechanical structure is synchronous with the moving speed of the moving object in the display screen to be tested; measuring MPRT by a high-speed camera requires that the shutter speed of the camera is N times (N is an integer) the driving speed of the display screen to be tested, and thus requires a very high photographing speed.
In addition, with the popularization of high-resolution display screens, the requirements for the mechanical structure of tracking cameras are more stringent; for a high-speed camera, in order to clearly shoot pixels in a display screen, a lens with higher magnification is required to be matched, so that light entering a photosensitive device is greatly reduced, the problem of insufficient sensitization exists, and the measurement accuracy of MPRT is affected.
TDI (Time Delay Integration ) is a special image acquisition technique commonly used for linear array CCD (Charge-Coupled Device) cameras. The linear array CCD camera adopting the TDI technology is simply called as a TDI camera, and the main characteristics of the TDI camera include:
1. high sensitivity: the TDI camera can remarkably improve the sensitivity of the image by accumulating signals of a plurality of rows, and can work under a very low illumination condition;
2. high signal-to-noise ratio: the TDI technology can accumulate signals at the same position, so that the signal strength is remarkably increased, and the signal-to-noise ratio of an image is effectively improved;
3. high speed performance: the TDI camera is suitable for detecting objects moving at high speed, and can realize high-speed image acquisition while maintaining high sensitivity and high signal-to-noise ratio.
Based on this, the embodiments of the present application provide an MPRT test system constructed with a TDI camera, which can be used for MPRT measurement of a high resolution display screen, and without additional moving mechanical structure support.
Fig. 1 is a schematic architecture diagram of a moving image response time testing system 100 according to an embodiment of the present disclosure, including a TDI camera 110 and an image analysis device 120; the TDI camera 110 is configured to collect a dynamic image on the display screen 130 to be tested, and generate a test image frame corresponding to the dynamic image; wherein, the dynamic image at least comprises a target object 131 moving at a first speed at a constant speed, the acquisition period of the tdi camera 110 is n times of the driving period of the display screen 130 to be tested, and n is a positive integer;
the image analysis device 120 is used for determining a blurring area in the test image frame and determining the response time of the moving image of the display screen to be tested based on the blurring area.
For example, the display screen 130 to be tested is configured to dynamically display the target object 131 at a fixed refresh frequency, and the target object 131 may be a white square, so that the dynamic image appears that the white square moves at a first speed on a black background in the display screen 130 to be tested, and the moving direction corresponding to the first speed may be any direction, but it is required to ensure that the scanning direction of the TDI camera is synchronous with the moving direction, and for convenience of measurement and calculation, the target object 131 may be generally set to move in a horizontal direction or a vertical direction.
For example, the moving speed of the moving image may be a pixels/frame, which indicates that after each refresh of the display screen 130 to be tested, the target object 131 in the new image frame is moved by a distance corresponding to the pixels of the display screen 130 to be tested along the moving direction of the target object, so that the first speed v1=the display screen refresh frequency fx the display screen pixel size L x a.
The driving period t=1/F of the display screen 130 to be tested, and the acquisition period of the TDI camera 110 is configured to be an integer multiple of the driving period of the display screen 130 to be tested, so as to ensure that a complete display screen period can be acquired, for example, the driving period of the display screen 130 to be tested is 16.7ms, then the acquisition period may be 16.7ms, 16.7 x 2ms, 16.7 x 3ms … 16.7.7 x 16.7 x n (ms), and so on.
As shown in fig. 1, the image analysis device 120 may be configured as part of the TDI camera 110 to process the test image frames acquired by the TDI camera and determine the moving image response time of the display screen to be tested from the test image frames.
According to the test system provided by the embodiment of the application, dynamic images on the display screen can be acquired through the TDI camera without using a moving mechanical structure or high shooting frequency, and the moving image response time of the display screen is determined according to the output image of the TDI camera, so that the camera cost for measuring the moving image response time can be saved, and the accuracy of measurement can be prevented from being influenced by underexposure.
Fig. 2 is a schematic diagram of a test image frame according to an embodiment of the present disclosure, as shown in fig. 2, a stripe region indicates a region in which a target object is completely displayed, a black region indicates a region in which the target object is not displayed at all, and a ghost portion generated by overlapping the black region and the stripe region is a blurred region generated due to motion blur.
In order to accurately determine the blurred region, after the TDI camera generates the test image frame, luminance data of the test image frame (including the luminance of each pixel point in the test image frame) is further output to an image analysis device, which is specifically configured to: determining the moving direction of the target object according to the brightness of each pixel point in the test image frame; and determining a fuzzy area according to the brightness change condition of the pixel points in the moving direction.
Because the target object in the display screen to be tested moves at a constant speed along the specific direction at a first speed, the brightness of the pixel points in the fuzzy area in the direction perpendicular to the moving direction of the target object in the test image frame is the same, and the moving direction of the target object in the test image frame can be determined according to the brightness of each pixel point.
Further, since the brightness of each pixel point in the stripe area and the black area is substantially uniform, the brightness of the adjacent pixel points along the moving direction of the target object is also substantially the same, so that the target pixel point belonging to the blurred area can be determined according to the brightness change rate between the adjacent pixel points along the moving direction, the pixel point with the brightness change rate between the adjacent pixel points along the moving direction of the target object greater than the preset value is determined as the target pixel point, and the blurred area is determined according to the target pixel point.
In one embodiment, the image analysis device is specifically configured to: determining a blurring width according to the blurring region; a moving image response time is determined based on the blur width and the first speed.
It can be understood that since the brightness of the pixel points in the direction perpendicular to the moving direction of the target object in the blurred region is the same, both blurred edges of the blurred region in the moving direction of the target object are perpendicular to the moving direction, and the blurred width represents the width of the blurred region in the moving direction of the target object, and thus the moving image response time can be determined based on the blurred width and the first speed.
Fig. 3 is a schematic view of a luminance change of a test image frame in a moving direction of a target object according to an embodiment of the present disclosure, an abscissa indicates a position in the moving direction of the target object, and an ordinate indicates a luminance of a pixel located at the position.
As shown in fig. 3, the brightness of each pixel point corresponding to the stripe region and the black region remains substantially unchanged in the moving direction of the target object, the brightness of each pixel point corresponding to the blurred region where the stripe region and the black region overlap each other decreases at a rate of change greater than a predetermined value in the moving direction of the target object (for the test frame image corresponding to other time instants, the brightness of each pixel point corresponding to the blurred region may also increase at a rate of change greater than a predetermined value in the moving direction of the target object), the blur width may be determined based on the abscissa corresponding to the blurred edge, and the moving image response time may be determined by using the ratio of the blur width to the first speed.
Specifically, when determining the response time of the moving image according to the blur width and the first speed, an actual scaling ratio of the test image frame generated by the TDI camera and the moving image on the display screen to be tested needs to be considered, where the actual scaling ratio is related to the lens magnification of the TDI camera and the distance between the TDI camera and the display screen to be tested.
For example, if the actual scaling ratio of the test image frame corresponding to fig. 3 and the dynamic image on the display screen to be tested is 1:1, the pixel size L of the display screen to be tested is 78um, the driving frequency F is 60HZ, the moving speed of the dynamic image is 2 pixels/frame, the first speed v 1 =2×l×f, if the blur width d is 0.20mm, mprt=d/v 1 ＝21.37ms。
Preferably, in addition to directly taking the abscissa span of the luminance change curve corresponding to the blurred region as the blurred width, the portion between 10% and 90% of the corresponding points on the luminance change curve corresponding to the blurred region in fig. 3 can be taken as the blurred width d corresponding to the blurred edge time BETF 2 The blur width d2 is amplified by 1.25 times to calculate and represent MPRT, if d 2 0.17289mm, mprt=d 2 /v 1 ＝22.94ms。
By way of example, the test result of the test system for moving image response time in the embodiment of the present application in fig. 3 may be verified by using an LC (liquid crystal) response curve of the display screen and each frame time, and the convolution of the LC response curve and each frame time obtains a time-dependent change curve of pixel brightness on the display screen as shown in fig. 4, and the BETF is also expressed between the corresponding points of 10% and 90% of the time-dependent change curve of brightness, and is amplified by 1.25 times to obtain mprt=23 ms, so that the test result of fig. 4 about MPRT is close to the test result of the test system for moving image response time in the embodiment of the present application corresponding to fig. 3, and the feasibility of the test system is further verified.
In one embodiment, the TDI camera is configured to: the line scan speed is adjusted according to the lens magnification and the photosensitive element size to match the line scan speed to the first speed.
It can be understood that, in order to ensure that all other areas except the blurred area caused by the motion blur in the acquired test image frame are imaged clearly, it is necessary to ensure that the line scanning speed of the TDI camera matches with the moving speed of the target object on the display screen to be tested, specifically, the line scanning speed can be controlled by controlling the line frequency of the TDI camera.
For example, if the photosensitive element size L of the TDI camera 2 =5um, lens magnification of 2 times, refresh frequency F of display screen to be tested 1 60HZ, the pixel size L of the display screen to be tested 1 The moving speed of the moving image is 2 pixels/frame, the first speed v 1 ＝2L 1 F 1 Line frequency F of TDI camera 2 ＝2v 1 /L 2 ＝1440HZ。
The specific setting and implementation modes of the embodiment of the application are described from different angles, according to the test system provided by the embodiment of the application, a static TDI camera can be directly utilized to collect dynamic images on a display screen to be tested without a motion mechanical structure and high shooting frequency, and the collected and generated image frames are processed and analyzed to determine the response time of the dynamic images of the display screen to be tested; in addition, TDI cameras are cheaper to cost than high-speed cameras and tracking cameras and have better dark state light sensitivity characteristics than do motion image response time measurements.
The embodiment of the application also provides a method for testing the response time of the moving image, which can be applied to the system for testing the response time of the moving image, as shown in fig. 5, and comprises the following steps:
step S510, a TDI camera is utilized to collect dynamic images on a display screen to be tested, and test image frames corresponding to the dynamic images are generated; the dynamic image at least comprises a target object moving at a first speed at a constant speed, the acquisition period of the TDI camera is n times of the driving period of the display screen to be tested, and n is a positive integer;
step S520, determining a blurred region in the test image frame;
step S530, determining the moving image response time of the display screen to be tested based on the blurred region.
In one embodiment, determining the blur area in the test image frame in step S520 includes: determining the moving direction of the target object according to the brightness of each pixel point in the test image frame; and determining a fuzzy area according to the brightness change condition of the pixel points in the moving direction.
In one embodiment, determining the blur area according to a brightness change condition of the pixel point in the moving direction includes: determining a plurality of target pixel points in the test image frame, wherein the brightness change rate between the target pixel points and the adjacent pixel points in the moving direction is larger than a preset value; an area composed of a plurality of target pixel points is determined as a blurred area.
In one embodiment, determining a moving image response time of the display screen to be tested based on the blurred region in step S530 includes: determining a blurring width according to the blurring region; a moving image response time is determined based on the blur width and the first speed.
In one embodiment, the method further comprises: the line scan speed of the TDI camera is adjusted based on the lens magnification and the photosensitive element size of the TDI camera to match the line scan speed to the first speed.
The detailed description of the method for testing the response time of the moving image in the embodiment of the present application may refer to the corresponding description part applied to the system for testing the response time of the moving image, and has corresponding beneficial effects, which are not described herein again.
Fig. 6 is a block diagram of an electronic device used to implement an embodiment of the present application. As shown in fig. 6, the electronic device includes: a memory 601 and a processor 602, the memory 601 storing a computer program executable on the processor 602. The processor 602, when executing the computer program, implements the methods in the above embodiments. The number of memories 601 and processors 602 may be one or more.
The electronic device further includes:
and the communication interface 603 is used for communicating with external equipment and performing data interaction transmission.
If the memory 601, the processor 602, and the communication interface 603 are implemented independently, the memory 601, the processor 602, and the communication interface 603 may be connected to each other and perform communication with each other through buses. The bus may be an Industry standard architecture (Industry StandardArchitecture, ISA) bus, an external device interconnect (Peripheral Component Interconnect, PCI) bus, or an extended Industry standard architecture (Extended Industry StandardArchitecture, EISA) bus, among others. The bus may be classified as an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in fig. 6, but not only one bus or one type of bus.
Alternatively, in a specific implementation, if the memory 601, the processor 602, and the communication interface 603 are integrated on a chip, the memory 601, the processor 602, and the communication interface 603 may perform communication with each other through internal interfaces.
The present embodiments provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the methods provided in the embodiments of the present application.
The embodiment of the application also provides a chip, which comprises a processor and is used for calling the instructions stored in the memory from the memory and running the instructions stored in the memory, so that the communication device provided with the chip executes the method provided by the embodiment of the application.
The embodiment of the application also provides a chip, which comprises: the input interface, the output interface, the processor and the memory are connected through an internal connection path, the processor is used for executing codes in the memory, and when the codes are executed, the processor is used for executing the method provided by the application embodiment.
It should be appreciated that the processor described above may be a CPU, but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), FPGA or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or any conventional processor or the like. It is noted that the processor may be a processor supporting an advanced reduced instruction set machine (Advanced RISC Machines, ARM) architecture.
Further alternatively, the memory may include a read-only memory and a random access memory. The memory may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), programmable ROM (PROM), erasable Programmable ROM (EPROM), electrically Erasable EPROM (EEPROM), or flash Memory, among others. Volatile memory can include random access memory (Random Access Memory, RAM), which acts as external cache memory. By way of example, and not limitation, many forms of RAM are available. For example, static RAM (SRAM), dynamic RAM (Dynamic RandomAccess Memory, DRAM), synchronous DRAM (SDRAM), double Data Rate Synchronous DRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), and Direct RAM (DR RAM).
In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions in accordance with the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. Computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another.
In the description of the present specification, a description referring to the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Any process or method described in flow charts or otherwise herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process. And the scope of the preferred embodiments of the present application includes additional implementations in which functions may be performed in a substantially simultaneous manner or in an opposite order from that shown or discussed, including in accordance with the functions that are involved.
Logic and/or steps described in the flowcharts or otherwise described herein, e.g., may be considered a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions.
It is to be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. All or part of the steps of the methods of the embodiments described above may be performed by a program that, when executed, comprises one or a combination of the steps of the method embodiments, instructs the associated hardware to perform the method.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules described above, if implemented in the form of software functional modules and sold or used as a stand-alone product, may also be stored in a computer-readable storage medium. The storage medium may be a read-only memory, a magnetic or optical disk, or the like.
The foregoing is merely exemplary embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of various changes or substitutions within the technical scope of the present application, which should be covered in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (12)
1. A moving image response time test system, comprising:
the TDI camera is used for collecting dynamic images on a display screen to be tested and generating test image frames corresponding to the dynamic images; the dynamic image at least comprises a target object moving at a first speed at a constant speed, the acquisition period of the TDI camera is n times of the driving period of the display screen to be tested, and n is a positive integer;
and the image analysis device is used for determining a fuzzy area in the test image frame and determining the moving image response time of the display screen to be tested based on the fuzzy area.
2. The system according to claim 1, wherein the image analysis device is specifically configured to:
determining the moving direction of the target object according to the brightness of each pixel point in the test image frame;
and determining the fuzzy area according to the brightness change condition of the pixel points in the moving direction.
3. The system according to claim 2, wherein the image analysis device is specifically configured to:
determining a plurality of target pixel points in the test image frame, wherein the brightness change rate between the target pixel points and the adjacent pixel points in the moving direction is larger than a preset value;
and determining an area formed by the plurality of target pixel points as the blurring area.
4. The system according to claim 2, wherein the image analysis device is specifically configured to:
determining a blurring width according to the blurring area;
the moving image response time is determined based on the blur width and the first speed.
5. The system of claim 1, wherein the TDI camera is configured to:
and adjusting the line scanning speed according to the lens magnification and the size of the photosensitive element so as to enable the line scanning speed to be matched with the first speed.
6. A method for testing a moving image response time, comprising:
collecting a dynamic image on a display screen to be tested by using a TDI camera, and generating a test image frame corresponding to the dynamic image; the dynamic image at least comprises a target object moving at a first speed at a constant speed, the acquisition period of the TDI camera is n times of the driving period of the display screen to be tested, and n is a positive integer;
determining a blur area in the test image frame;
and determining the moving image response time of the display screen to be tested based on the fuzzy area.
7. The method of claim 6, wherein determining a blur area in the test image frame comprises:
determining the moving direction of the target object according to the brightness of each pixel point in the test image frame;
and determining the fuzzy area according to the brightness change condition of the pixel points in the moving direction.
8. The method of claim 7, wherein determining the blur area based on a change in brightness of a pixel in the direction of movement comprises:
determining a plurality of target pixel points in the test image frame, wherein the brightness change rate between the target pixel points and the adjacent pixel points in the moving direction is larger than a preset value;
and determining an area formed by the plurality of target pixel points as the blurring area.
9. The method of claim 7, wherein determining a moving image response time of the display screen to be tested based on the blur area comprises:
determining a blurring width according to the blurring area;
the moving image response time is determined based on the blur width and the first speed.
10. The method of claim 6, wherein the method further comprises:
and adjusting the line scanning speed of the TDI camera according to the lens magnification and the photosensitive element size of the TDI camera so as to enable the line scanning speed to be matched with the first speed.
11. An electronic device, comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 6-10.
12. A computer readable storage medium having stored therein a computer program which, when executed by a processor, implements the method of any of claims 6-10.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311618911.6A CN117611557A (en) | 2023-11-29 | 2023-11-29 | System, method, electronic device, and medium for testing moving image response time |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311618911.6A CN117611557A (en) | 2023-11-29 | 2023-11-29 | System, method, electronic device, and medium for testing moving image response time |
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| CN (1) | CN117611557A (en) |
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