MTF test method and device

Abstract

The invention discloses an MTF test method and device. The method comprises the following steps: acquiring an initial shooting picture of to-be-tested equipment between a shooting camera and an image card at an initial angle; according to the initial shooting picture, determining the exceeding sizes of the two ends of the shooting surface of the to-be-detected equipment exceeding the shooting area between the shooting camera and the picture card; according to the oversize, determining required adjustment angles when the two ends of the to-be-detected equipment are rotated into the shooting area respectively; obtaining a supplementary shooting picture of the to-be-tested equipment after rotation according to the adjustment angle; and obtaining an analysis picture completely covering the shooting surface according to the initial shooting picture and the supplementary shooting picture. According to the method, after the initial shooting picture of the to-be-tested equipment is obtained at the initial angle, the to-be-tested equipment is rotated and subjected to supplementary shooting, the supplementary shooting picture including the unshot area in the initial shooting picture is obtained, and finally the analysis picture completely covering the shooting surface can be obtained by using the supplementary shooting picture and the initial shooting picture. And subsequent MTF test analysis can be smoothly carried out.

Description

Technical Field

[0001] The present application relates to the technical field of near-eye display device detection, and in particular to an MTF testing method and device. Background Art

[0002] During the detection and analysis of the modulation transfer function (MTF) of the near eye display (NED) module, in addition to detecting the lit state, it is often necessary to detect the module in the unlit state. In the unlit state, the field of view (FOV) needs to cover the entire device under test, that is, a larger FOV is required, and conventional lenses generally cannot cover the entire measurement area.

[0003] To address the above issues, the traditional method uses a rotating camera to meet the requirements of detecting different areas. However, due to the large size and weight of some special cameras or colorimeters, it is difficult or impossible to rotate the structure, which makes it very difficult to implement the rotating camera solution. At the same time, the rotating camera solution also requires that the camera can always capture the chart board on the other side of the device under test when rotating, that is, the size of the chart board needs to meet the camera's ability to always cover the FOV that rotates with the camera under test during the rotation process, so a larger chart board is required. Ultimately, the traditional solution is easily limited by the volume limitations of each device and needs further improvement. Summary of the invention

[0004] The present application provides an MTF test method, apparatus, device and computer-readable storage medium, which can solve the technical problems existing in the above-mentioned related technologies.

[0005] In a first aspect, an embodiment of the present application provides an MTF test method, which adopts the following technical solution:

[0006] An MTF testing method, the method comprising:

[0007] Obtain an initial captured image of the device under test between the camera and the image card at an initial angle;

[0008] According to the initial shooting picture, determining the excess dimensions of the two ends of the shooting surface of the device under test that respectively exceed the shooting area between the shooting camera and the image card;

[0009] According to the excess size, determining the required adjustment angles for rotating the two ends of the device under test to within the shooting area;

[0010] Acquire a supplementary photographed picture of the device under test after being rotated according to the adjustment angle;

[0011] An analysis picture that completely covers the shooting surface is obtained according to the initial shooting picture and the supplementary shooting picture.

[0012] In combination with the first aspect, in one implementation, the two ends of the device under test are respectively rotated to required adjustment angles within the shooting area according to the excess size.

[0013] According to the excess size, the adjustment angles required when the two ends of the device under test are respectively rotated to coincide with the edge of the shooting area are determined.

[0014] In combination with the first aspect, in one implementation, before obtaining the supplementary captured image of the device under test rotated according to the adjustment angle, the following steps are included:

[0015] The device under test is rotated according to the adjustment angle.

[0016] In combination with the first aspect, in one implementation, before obtaining the supplementary captured image of the device under test rotated according to the adjustment angle, the following steps are included:

[0017] According to the adjustment angle, the display screen of the picture card is adjusted.

[0018] In combination with the first aspect, in one implementation, adjusting the initial display screen of the picture card according to the adjustment angle includes the following steps:

[0019] Determining an adjustment target for the content of the initial display image according to the adjustment angle;

[0020] According to the adjustment target of the picture content, the initial display content of the picture card is adjusted.

[0021] In combination with the first aspect, in one implementation, obtaining an analysis picture that completely covers a shooting surface of the device under test according to the initial shooting picture and the supplementary shooting picture includes the following steps:

[0022] Adjusting the supplementary shooting picture according to the adjustment angle corresponding to the supplementary shooting picture to obtain a supplementary analysis picture;

[0023] An analysis picture that completely covers the shooting surface of the device under test is obtained according to the initial shooting picture and the supplementary analysis picture.

[0024] In combination with the first aspect, in one implementation, adjusting the supplementary shooting picture according to the adjustment angle corresponding to the supplementary shooting picture to obtain the supplementary analysis picture includes the following steps:

[0025] Determining an adjustment target for the picture content according to the adjustment angle;

[0026] The supplementary shooting picture is adjusted according to the adjustment target of the picture content to obtain a supplementary analysis picture.

[0027] In a second aspect, an embodiment of the present application provides an MTF test device, which adopts the following technical solution:

[0028] An MTF testing device, comprising:

[0029] An acquisition module, configured to acquire a captured image of the device under test between the camera and the image card;

[0030] An angle calculation module is configured to determine, based on the initial shooting picture, the excess dimensions of the two ends of the shooting surface of the device under test that respectively exceed the shooting area between the shooting camera and the image card; and determine, based on the excess dimensions, the required adjustment angles for rotating the two ends of the device under test to within the shooting area;

[0031] The analysis module is configured to obtain an analysis picture that completely covers the shooting surface of the device under test based on the initial shooting picture and the supplementary shooting picture after the device under test is rotated according to the adjustment angle.

[0032] In conjunction with the second aspect, in one implementation, the method further includes:

[0033] An angle adjustment module is configured to rotate the device under test according to the adjustment angle.

[0034] In conjunction with the second aspect, in one implementation, the method further includes:

[0035] A picture card adjustment module is configured to adjust the display picture of the picture card according to the adjustment angle before acquiring the supplementary shooting picture of the device under test after the position adjustment; or includes:

[0036] A shooting picture adjustment module is configured to adjust the supplementary shooting picture according to the adjustment angle corresponding to the supplementary shooting picture to obtain a supplementary analysis picture when an analysis picture that completely covers the shooting surface of the device under test is obtained according to the initial shooting picture and the supplementary shooting picture, so that the analysis module can obtain an analysis picture that completely covers the shooting surface of the device under test according to the initial shooting picture and the supplementary analysis picture.

[0037] In a third aspect, an embodiment of the present application provides an MTF test device, which adopts the following technical solution:

[0038] An MTF testing device comprises a processor, a memory, and an MTF testing program stored in the memory and executable by the processor, wherein when the MTF testing program is executed by the processor, the steps of the MTF testing method described above are implemented.

[0039] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, which adopts the following technical solution:

[0040] A computer-readable storage medium stores an MTF test program, wherein when the MTF test program is executed by a processor, the steps of the MTF test method described above are implemented.

[0041] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0042] After obtaining the initial shooting picture corresponding to the device under test at the initial angle, the excess dimensions at both ends of the shooting surface of the device under test are determined according to the content of the picture, and the adjustment angle that the device under test needs to rotate when both ends of the device under test can be photographed is further obtained according to the excess dimension analysis, and the device under test rotated according to the adjustment angle can be supplemented with shooting, so as to obtain a supplementary shooting picture including the area not photographed in the initial shooting picture, and finally the analysis picture that completely covers the shooting surface can be obtained by using the supplementary shooting picture and the initial shooting picture, so as to smoothly carry out the subsequent MTF test analysis, and in this application, there is no need to adjust the shooting camera, so as to avoid the problem that some special shooting cameras are difficult to rotate or cannot be rotated due to space limitations, and at the same time, because the shooting camera does not need to be rotated, the size of the chart only needs to correspond to the field of view angle of the shooting camera in a fixed state, and the required size is greatly reduced, further reducing the possibility of equipment space limitations. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a flow chart of an embodiment of the MTF testing method of the present application;

[0044] Figure 2 This is a schematic diagram of device distribution for photographing the device under test at an initial angle in the MTF test method of this application;

[0045] Figure 3 This is a schematic diagram of device distribution in the MTF test method of this application, in which the device under test is rotated to the right end according to an adjustment angle to overlap with the shooting area for shooting;

[0046] Figure 4This is a schematic diagram of device distribution in the MTF test method of this application, in which the device under test is rotated to the left end according to another adjustment angle to overlap with the shooting area for shooting;

[0047] Figure 5 This is a functional module diagram of an embodiment of the MTF test device of the present application;

[0048] Figure 6 This is a schematic diagram of the hardware structure of the MTF test equipment involved in the embodiment of the present application;

[0049] Reference numerals:

[0050] 1. Shooting camera;

[0051] 2. Equipment under test;

[0052] 3. Picture card. DETAILED DESCRIPTION

[0053] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0054] In the process of detecting and analyzing the modulation transfer function (MTF) of the near eye display (NED) module, in addition to detecting the lighting state, it is often necessary to detect the module in the off-light state. In the off-light state, the field of view (FOV) needs to cover the entire device under test, that is, a larger FOV is required, and conventional lenses generally cannot cover the entire measurement area. Figure 1 .

[0055] To address the above issues, the traditional method uses a rotating camera to meet the requirements of detecting different areas. However, due to the large size and weight of some special cameras or colorimeters, it is difficult or impossible to rotate the structure, which makes it very difficult to implement the rotating camera solution. At the same time, the rotating camera solution also requires that the camera can always capture the chart board on the other side of the device under test when rotating, that is, the size of the chart board needs to meet the camera's ability to always cover the FOV that rotates with the camera under test during the rotation process, so a larger chart board is required. Ultimately, the traditional solution is easily limited by the volume limitations of each device and needs further improvement.

[0056] Based on the above problems, the present application provides an MTF test method and device, the main point of the invention is that after obtaining the initial shooting picture corresponding to the device under test 2 at the initial angle, the excess size of the two ends of the shooting surface of the device under test 2 is determined according to the picture content, and the adjustment angle that the device under test 2 needs to rotate when the two ends of the device under test 2 can be photographed is further obtained according to the excess size analysis, so that the device under test 2 rotated according to the adjustment angle can be supplemented with shooting, and a supplementary shooting picture including the area not photographed in the initial shooting picture is obtained. Finally, the analysis picture that completely covers the shooting surface can be obtained by using the supplementary shooting picture and the initial shooting picture, so as to smoothly carry out subsequent MTF test analysis. In the present application, there is no need to adjust the shooting camera 1, which avoids the problem that some special shooting cameras 1 are difficult to rotate or cannot be rotated due to space limitations. At the same time, since the shooting camera 1 does not need to rotate, the size of the chart 3 only needs to correspond to the field of view angle of the shooting camera 1 in a fixed state, and the required size is greatly reduced, further reducing the possibility of equipment space limitation.

[0057] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0058] In a first aspect, an embodiment of the present application provides an MTF testing method.

[0059] In one embodiment, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the MTF test method of this application. Figure 1 As shown, the MTF test method includes:

[0060] S100, obtaining an initial shooting picture of the device under test 2 between the shooting camera 1 and the image card 3 at an initial angle;

[0061] Specifically, when the device under test 2 is placed between the shooting camera 1 and the picture card 3, its main body will face the shooting camera 1 in a manner parallel to the picture card 3 behind it. At this time, since the field of view of the shooting camera 1 is smaller than the field of view of the human eye, it is impossible for it to completely capture the display surface of the device under test 2 provided for the human eye, that is, the shooting surface of the device under test 2 that needs to be photographed. This problem is specifically reflected in that both ends of the shooting surface of the device under test 2 will exceed the shooting area formed between the shooting camera 1 and the picture card 3.

[0062] S200, determining, based on the initial shooting picture, the excess dimensions of the two ends of the shooting surface of the device under test 2 that respectively exceed the shooting area between the shooting camera 1 and the picture card 3;

[0063] Specifically, by obtaining the size and specific position of the photographed part of the device 2 under test on the initial shooting screen, the unphotographed part of the device 2 under test and the specific dividing point can be determined, and then the excess size of the shooting surface of the device 2 under test beyond the shooting area can be further determined.

[0064] S300, determining, according to the excess size, required adjustment angles for rotating the two ends of the device under test 2 to within the shooting area;

[0065] Specifically, the adjustment angle will be determined according to geometric principles, and can be calculated by a pre-built-in calculation model, or obtained by external means such as calculation by a technician, and then input into the execution subject of this method, and this application does not limit this. The adjustment angle needs to ensure that at least one end is within the shooting area, so that the part of the picture that the device under test 2 did not capture at the initial angle can be successfully obtained.

[0066] S400, obtaining a supplementary shooting picture of the device under test 2 after being rotated according to the adjustment angle;

[0067] Among them, the specific method of adjusting the angle and rotating the device under test 2 can be manually adjusted by a technician based on the obtained adjustment angle result, or realized by the execution subject of the method controlling the rotating device connected thereto, and the present application does not impose any restrictions on this. It should be noted that the rotation axis of the device under test 2 needs to ensure that both ends of the device under test 2 can rotate around the rotation axis to within the shooting area. In this embodiment, preferably, before S400, obtaining the supplementary shooting picture of the device under test 2 after rotation according to the adjustment angle, execute step S310: rotate the device under test 2 according to the adjustment angle.

[0068] S500: Obtain an analysis picture that completely covers the shooting surface according to the initial shooting picture and the supplementary shooting picture.

[0069] In this embodiment, refer to Figure 2After obtaining the initial shooting picture corresponding to the device under test 2 at the initial angle, the excess size of the two ends of the shooting surface of the device under test 2 is determined according to the content of the picture, and the adjustment angle that the device under test 2 needs to rotate when the two ends of the device under test 2 can be photographed is further obtained according to the excess size analysis, and the device under test 2 rotated according to the adjustment angle can be supplemented with shooting, and a supplementary shooting picture including the area not photographed in the initial shooting picture is obtained. Finally, the analysis picture that completely covers the shooting surface can be obtained by using the supplementary shooting picture and the initial shooting picture, so as to smoothly carry out the subsequent MTF test analysis. In this application, there is no need to adjust the shooting camera 1, which avoids the problem that some special shooting cameras 1 are difficult to rotate or cannot be rotated due to space limitations. At the same time, since the shooting camera 1 does not need to rotate, the size of the chart 3 only needs to correspond to the field of view of the shooting camera 1 in a fixed state, and the required size is greatly reduced, further reducing the possibility of equipment space limitation.

[0070] Further, in one embodiment, in step S300, according to the excess size, it is determined that the two ends of the device under test 2 are respectively rotated to the required adjustment angles within the shooting area,

[0071] According to the excess size, the adjustment angles required when the two ends of the device under test 2 are respectively rotated to coincide with the edge of the shooting area are determined.

[0072] Reference Figure 3 and Figure 4 In this embodiment, by taking the two ends of the device under test 2 as the calculation condition and rotating them to coincide with the edges of the shooting area, the minimum adjustment angle that can just capture the ends of the device under test 2 and the chart 3 behind it is calculated, so as to avoid further rotation of the device under test 2 after the adjustment angle becomes larger. At the same time, the difference between the image of the rotated device under test 2 in front of the chart 3 and the initial shooting picture is also reduced, which is convenient for operators to analyze.

[0073] In addition, in the traditional adjustment method, although the shooting camera 1 is rotating, the relative position relationship between the device under test 2 and the rear picture card 3 does not change, which can more realistically simulate the effect of a human eye that remains motionless observing the picture card 3 through the device under test 2. In this solution, since the device under test 2 rotates, the relative position between it and the rear picture card 3 changes. Therefore, when the rear picture card 3 is photographed by the changed device under test 2, the image obtained will be slightly different from the initial photographed image. Based on the above problems, the present application further includes, in some embodiments, the step S400, before the supplementary photographed picture of the device under test 2 rotated according to the adjustment angle, the following steps will be included:

[0074] S320: Adjust the display screen of the picture card 3 according to the adjustment angle.

[0075] In step S320, the present application will adjust the display screen of the picture card 3 in advance according to the differences caused by the adjustment angle, so that the acquired supplementary picture can be as close as possible to the state of the initial picture taken at the initial angle, thereby facilitating subsequent analysis.

[0076] Among them, the picture card 3 can be a virtual picture displayed in the display, or it can be a real canvas with a pattern. The virtual picture can be adjusted directly by modifying the corresponding parameters, and the real canvas needs to be replaced with the corresponding real canvas. This application does not make further restrictions here.

[0077] Specifically, step S320, adjusting the initial display screen of the picture card 3 according to the adjustment angle, includes the following steps:

[0078] S321, determining an adjustment target of the picture content in the initial display picture according to the adjustment angle;

[0079] S322: Adjust the initial display content of the picture card 3 according to the adjustment target of the picture content.

[0080] Among them, after the device under test 2 is rotated according to the adjustment angle, the source of the light refracted from the same point on the device under test 2 will change, that is, the picture of the picture card 3 in the shooting picture will be scaled, and the adjustment target of the picture content in the initial display picture that needs to be adjusted in this embodiment can be further deduced according to the scaling amount. Furthermore, after the initial display picture is adjusted by using the adjustment target, the picture effect of the picture card 3 shot by the camera 1 through the rotated device under test 2 will be closer to the initial shooting picture, and a supplementary shooting picture closer to the shooting state of the initial shooting picture can be obtained. At this time, the subsequent combined analysis can be performed based on the use of the supplementary shooting picture and the initial shooting picture.

[0081] Based on the same principle, in some other embodiments, different solutions from the above embodiments are adopted, specifically: Step S500, according to the initial shooting picture and the supplementary shooting picture, obtaining an analysis picture that completely covers the shooting surface of the device under test 2, including the following steps:

[0082] S510, adjusting the supplementary shooting picture according to the adjustment angle corresponding to the supplementary shooting picture to obtain a supplementary analysis picture;

[0083] S520 , obtaining an analysis picture that completely covers the shooting surface of the device under test 2 according to the initial shooting picture and the supplementary analysis picture.

[0084] Specifically, step S510, adjusting the supplementary shooting picture according to the adjustment angle corresponding to the supplementary shooting picture to obtain a supplementary analysis picture, includes the following steps:

[0085] S511, determining an adjustment target of the picture content according to the adjustment angle;

[0086] S512: Adjust the supplementary shooting picture according to the adjustment target of the picture content to obtain a supplementary analysis picture.

[0087] In this way, the supplementary shooting image can be adjusted and corrected by adjusting the angle, so that it becomes a supplementary analysis picture that is closer to the shooting state of the initial shooting picture. Finally, the supplementary analysis picture and the initial shooting picture can be combined to obtain an analysis picture that completely covers the shooting surface of the device under test 2.

[0088] In a second aspect, an embodiment of the present application also provides an MTF testing device.

[0089] In one embodiment, referring to Figure 5 , Figure 5 This is a functional module diagram of an embodiment of the MTF test device of the present application. Figure 5 As shown, the MTF test setup includes:

[0090] An acquisition module, configured to acquire a captured image of the device under test 2 between the camera 1 and the image card 3;

[0091] An angle calculation module is configured to determine, based on the initial shooting picture, the excess dimensions of the two ends of the shooting surface of the device under test 2 that respectively exceed the shooting area between the shooting camera 1 and the picture card 3; and determine, based on the excess dimensions, the required adjustment angles for rotating the two ends of the device under test 2 to within the shooting area;

[0092] The analysis module is configured to obtain an analysis picture that completely covers the shooting surface of the device under test 2 according to the initial shooting picture and the supplementary shooting picture after the device under test 2 is rotated according to the adjustment angle.

[0093] The acquisition module may be a communication and control module that directly establishes a connection with the shooting camera 1 , or may be a data receiving module that can be input or receive information from other sources, and this application does not impose any limitation on this.

[0094] Furthermore, in one embodiment, the MTF testing device further includes:

[0095] An angle adjustment module is configured to rotate the device under test 2 according to the adjustment angle.

[0096] Furthermore, in one embodiment, the MTF testing device further includes:

[0097] A picture card adjustment module is configured to adjust the display picture of the picture card 3 according to the adjustment angle before obtaining the supplementary shooting picture of the device under test 2 after the position adjustment; or includes:

[0098] A shooting picture adjustment module is configured to adjust the supplementary shooting picture according to the adjustment angle corresponding to the supplementary shooting picture when an analysis picture that completely covers the shooting surface of the device under test 2 is obtained according to the initial shooting picture and the supplementary shooting picture, so as to obtain a supplementary analysis picture, so that the analysis module can obtain an analysis picture that completely covers the shooting surface of the device under test 2 according to the initial shooting picture and the supplementary analysis picture.

[0099] Among them, the functional implementation of each module in the above-mentioned MTF testing device corresponds to each step in the above-mentioned MTF testing method embodiment, and its functions and implementation processes are no longer repeated here.

[0100] In a third aspect, an embodiment of the present application provides an MTF test device, which may be a device with data processing function, such as a personal computer (PC), a laptop computer, or a server.

[0101] Reference Figure 6 , Figure 6 The hardware structure diagram of the MTF test device involved in the embodiment of the present application is shown in FIG. In the embodiment of the present application, the MTF test device may include a processor, a memory, a communication interface, and a communication bus.

[0102] The communication bus may be of any type and is used to interconnect the processor, the memory, and the communication interface.

[0103] Communication interfaces include input / output (I / O) interfaces, physical interfaces, and logical interfaces, which are used to interconnect devices within the MTF test equipment, as well as interfaces used to interconnect the MTF test equipment with other devices (such as other computing devices or user devices). Physical interfaces can be Ethernet interfaces, optical fiber interfaces, ATM interfaces, etc.; user devices can be display screens (Display), keyboards (Keyboard), etc.

[0104] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0105] The processor may be a general-purpose processor, which may call the MTF test program stored in the memory and execute the MTF test method provided in the embodiment of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The method executed when the MTF test program is called may refer to the various embodiments of the MTF test method of the present application, which will not be described in detail here.

[0106] Those skilled in the art will understand that Figure 6 The hardware structure shown in the figure does not constitute a limitation on the present application, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0107] In a fourth aspect, an embodiment of the present application also provides a computer-readable storage medium.

[0108] The computer-readable storage medium of the present application stores an MTF test program, wherein when the MTF test program is executed by a processor, the steps of the MTF test method described above are implemented.

[0109] Among them, the method implemented when the MTF test program is executed can refer to the various embodiments of the MTF test method of the present application, and will not be repeated here.

[0110] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0111] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit "first", "second" and "third" to different types.

[0112] In the description of the embodiments of the present application, "exemplary", "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary", "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a specific way.

[0113] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; the “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0114] In some processes described in the embodiments of the present application, multiple operations or steps that appear in a specific order are included, but it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present application or in parallel, and the sequence number of the operation is only used to distinguish the different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed in sequence or in parallel, and these operations or steps may be combined.

[0115] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, disk, CD) as described above, and includes a number of instructions for a terminal device to execute the methods described in each embodiment of the present application.

[0116] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A MTF test method, characterized in that: The method comprises: Obtain an initial captured image of the device under test between the camera and the image card at an initial angle; According to the initial shooting picture, determining the excess dimensions of the two ends of the shooting surface of the device under test that respectively exceed the shooting area between the shooting camera and the image card; According to the excess size, determining the required adjustment angles for rotating the two ends of the device under test to within the shooting area; Acquire a supplementary photographed picture of the device under test after being rotated according to the adjustment angle; An analysis picture that completely covers the shooting surface is obtained according to the initial shooting picture and the supplementary shooting picture.

2. The MTF test method according to claim 1, characterized in that: According to the excess size, determining that both ends of the device under test are rotated to required adjustment angles within the shooting area, According to the excess size, the adjustment angles required when the two ends of the device under test are respectively rotated to coincide with the edge of the shooting area are determined.

3. The MTF test method according to claim 1, characterized in that: Before obtaining the supplementary captured image of the device under test rotated according to the adjustment angle, the following steps are included: The device under test is rotated according to the adjustment angle.

4. The MTF test method according to claim 1, characterized in that: Before obtaining the supplementary captured image of the device under test rotated according to the adjustment angle, the following steps are included: According to the adjustment angle, the display screen of the picture card is adjusted.

5. The MTF test method according to claim 4, characterized in that: The adjusting the initial display screen of the picture card according to the adjustment angle comprises the following steps: Determining an adjustment target for the content of the initial display image according to the adjustment angle; According to the adjustment target of the picture content, the initial display content of the picture card is adjusted.

6. The MTF test method according to claim 1, characterized in that: The step of obtaining an analysis picture that completely covers the shooting surface of the device under test according to the initial shooting picture and the supplementary shooting picture comprises the following steps: Adjusting the supplementary shooting picture according to the adjustment angle corresponding to the supplementary shooting picture to obtain a supplementary analysis picture; An analysis picture that completely covers the shooting surface of the device under test is obtained according to the initial shooting picture and the supplementary analysis picture.

7. The MTF test method according to claim 6, characterized in that: The step of adjusting the supplementary shooting picture according to the adjustment angle corresponding to the supplementary shooting picture to obtain a supplementary analysis picture comprises the following steps: Determining an adjustment target for the picture content according to the adjustment angle; The supplementary shooting picture is adjusted according to the adjustment target of the picture content to obtain a supplementary analysis picture.

8. An MTF test device, characterized in that: The device comprises: An acquisition module, configured to acquire a captured image of the device under test between the camera and the image card; An angle calculation module, configured to determine, based on the initial shooting picture, the excess dimensions of the two ends of the shooting surface of the device under test that respectively exceed the shooting area between the shooting camera and the image card; According to the excess size, determining the required adjustment angles for rotating the two ends of the device under test to within the shooting area; The analysis module is configured to obtain an analysis picture that completely covers the shooting surface of the device under test based on the initial shooting picture and the supplementary shooting picture after the device under test is rotated according to the adjustment angle.

9. The MTF test device according to claim 8, characterized in that: Also includes: An angle adjustment module is configured to rotate the device under test according to the adjustment angle.

10. The MTF test device according to claim 8, characterized in that: Also includes: A picture card adjustment module is configured to adjust the display picture of the picture card according to the adjustment angle before obtaining the supplementary shooting picture of the device under test after the position adjustment; or includes: A shooting picture adjustment module is configured to adjust the supplementary shooting picture according to the adjustment angle corresponding to the supplementary shooting picture to obtain a supplementary analysis picture when an analysis picture that completely covers the shooting surface of the device under test is obtained according to the initial shooting picture and the supplementary shooting picture, so that the analysis module can obtain an analysis picture that completely covers the shooting surface of the device under test according to the initial shooting picture and the supplementary analysis picture.

Images