CN106791818A - Test the method and the equipment for the test of camera resolving power of camera resolving power - Google Patents
Test the method and the equipment for the test of camera resolving power of camera resolving power Download PDFInfo
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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
- H04N17/002—Diagnosis, testing or measuring for television systems or their details for television cameras
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Abstract
The invention discloses a kind of method and a kind of equipment for adjusting the angle of camera to test camera resolving power for testing camera resolving power.Methods described includes：Plane is provided, the center of the plane is provided with test pattern；Adjust position and the angle of the camera so that the center of the visual field of the camera just to the test pattern, to shoot the test image of field of view center；Adjust the angle of the camera so that the marginal position of the visual field of the camera is directed at the test pattern, to shoot the test image of field of view edge；The test image of test image and the field of view edge according to the field of view center calculates the resolving power of the camera.The method of test camera resolving power of the invention can reduce the test space.
Description
Technical Field
The invention relates to the field of camera product testing, in particular to a method for testing the resolution of a camera and equipment for testing the resolution of the camera.
Background
In the prior art, a resolution test is performed on a camera, and a mode that a plane scene is placed at a specific test distance is generally adopted for the test. The construction of the test environment requires certain costs, such as the cost of site renting, the cost of manufacturing and constructing the planar scenery, the cost of arranging the light arrangement of the test environment, and the like, and the larger the construction cost of the test environment is, the higher the construction cost of the test environment is. In order to reduce the space requirement on the test environment and reduce the test cost, a magnifier can be placed between the camera and a plane scene to assist in performing resolution test.
However, with the rapid development of various parameters of the camera, a large-viewing-angle camera, even a camera with an ultra-large viewing angle, for example, a camera with a viewing angle greater than 100 degrees, is available on the market, and therefore a new resolution testing scheme capable of reducing the testing space is required to be provided.
Disclosure of Invention
The invention aims to provide a novel scheme for testing the resolution power of a camera, which can reduce the testing space.
According to a first aspect of the present invention, there is provided a method for testing the resolution of a camera, comprising the steps of:
providing a plane, wherein a test pattern is arranged at the center of the plane;
adjusting the position and the angle of the camera to ensure that the center of the visual field of the camera is over against the test pattern so as to shoot a test image at the center of the visual field;
adjusting the angle of the camera so that the edge position of the field of view of the camera is aligned with the test pattern to shoot a test image of the edge of the field of view;
and calculating the resolution of the camera according to the test image at the center of the field of view and the test image at the edge of the field of view.
Optionally, the adjusting the angle of the camera so that the edge position of the field of view of the camera is aligned with the test pattern to capture a test image of the edge of the field of view includes: and adjusting the angle of the camera so that the upper left edge position, the lower left edge position, the upper right edge position and the lower right edge position of the view field of the camera are respectively aligned with the test pattern to respectively shoot the test images of the view fields of the four edge positions.
Optionally, a field angle of the camera is equal to or greater than 100 degrees.
According to a second aspect of the present invention, there is provided a method for testing the resolution of a camera, comprising the steps of:
providing a plane, wherein the plane is provided with three test patterns, the three test patterns are positioned on the same straight line, and the middle test pattern is positioned in the center of the plane;
adjusting the position and the angle of the camera so that the center of the field of view of the camera is aligned with the test pattern at the center position, and the other two test patterns are respectively aligned in the upper left edge position and the lower right edge position of the field of view of the camera to shoot a first test picture; adjusting the angle of the camera so that the left lower edge position and the right upper edge position of the visual field of the camera are respectively aligned with the other two test patterns to shoot a second test picture; or,
adjusting the position and the angle of the camera so that the center of the field of view of the camera is aligned with the test pattern at the center position, and the other two test patterns are respectively aligned in the lower left edge position and the upper right edge position of the field of view of the camera to shoot a first test picture; adjusting the angle of the camera so that the left upper edge position and the right lower edge position of the visual field of the camera are respectively aligned with the other two test patterns to shoot a second test picture;
and the number of the first and second groups,
and calculating the resolution power of the camera according to the first test image and the second test image.
Optionally, a field angle of the camera is equal to or greater than 100 degrees.
According to a third aspect of the present invention, there is provided an apparatus for adjusting an angle of a camera to test a resolution of the camera, the apparatus comprising a driving motor and a rotating mechanism connected to the driving motor, the rotating mechanism being configured to rotate around a connection point of the driving motor and the rotating mechanism under the driving of the driving motor, the rotating mechanism being provided with a fixing portion for fixing the camera.
Optionally, the apparatus further comprises a control device, and the control device controls the action of the driving motor in a wired or wireless mode.
Optionally, the control means is a computer device.
Optionally, a field angle of the camera is equal to or greater than 100 degrees.
According to the method for testing the resolution of the camera, the test images of the center and the edge of the visual field of the camera are collected by adjusting the angle of the camera, so that the test space is reduced, and the test cost is reduced.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below. It is appreciated that the following drawings depict only certain embodiments of the invention and are therefore not to be considered limiting of its scope. For a person skilled in the art, it is possible to derive other relevant figures from these figures without inventive effort.
Fig. 1 shows a schematic structural diagram of an apparatus for testing the resolution of a camera according to an embodiment of the present invention.
Fig. 2-4 show schematic diagrams of a first embodiment of testing the resolution of a camera using the apparatus of fig. 1.
Fig. 5 shows a schematic diagram of a second embodiment for testing the resolution of a camera using the apparatus of fig. 1.
Fig. 6 is a block diagram showing a hardware configuration of a computer device provided by an embodiment of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Referring to fig. 1, the device for adjusting the angle of the camera to test the resolution power of the camera according to the embodiment of the present invention includes a rotating mechanism 3, a driving motor 4, and a control device. The driving motor 3 is connected with the rotating mechanism 4, the rotating mechanism 4 can rotate around the connecting point of the rotating mechanism 4 and the driving motor 3 under the driving of the driving motor 3, and the rotating mechanism 3 is provided with a fixing part for fixing the camera.
In one embodiment, the control means may be a computer device 5. In another embodiment, the control device may be other intelligent electronic devices, such as a smart phone.
The equipment for testing the resolution of the camera, provided by the embodiment of the invention, is particularly suitable for testing the resolution of the camera with a large field angle, and is particularly suitable for testing the resolution of the camera with the field angle more than or equal to 100 degrees.
Referring to fig. 2-4, a method for testing the resolution of a camera according to a first embodiment of the present invention is shown, which includes the following steps:
step a, providing a plane 100, and arranging a test pattern 200 at the center of the plane 100. The test pattern 200 may be attached to the plane 100 by glue or the test pattern 200 may be directly drawn on the plane 100.
Step b, referring to fig. 2, the position and angle of the camera 1 are adjusted so that the center of the field of view 300 of the camera 1 is aligned with the test pattern 200 to capture a test image of the center of the field of view. After the step b is adjusted, the position and angle of the fixing part 2 are such that the optical axis of the camera 1 is aligned with the test pattern 200 and perpendicular to the test pattern 200.
And c, referring to fig. 3, adjusting the angle of the camera 1 to make the upper left edge position of the view field 300 of the camera 1 aligned with the test image 200, so as to obtain the test image of the upper left edge position of the view field 300. And adjusting the angle of the camera 1 again to make the lower left edge position of the view field 300 of the camera 1 aligned with the test image 200, so as to obtain the test image at the lower left edge position of the view field 300.
Step d, referring to fig. 4, adjusting the angle of the camera 1 so that the upper right edge position of the field of view 300 of the camera 1 is aligned with the test image 200, thereby obtaining the test image at the upper right edge position of the field of view 300. And adjusting the angle of the camera 1 again to make the lower right edge position of the view field 300 of the camera 1 aligned with the test image 200, so as to obtain the test image at the lower right edge position of the view field 300.
Since the field of view of the camera is usually rectangular, it is usually necessary to test the resolution of the upper left edge position, the lower left edge position, the upper right edge position, and the lower right edge position of the field of view of the camera. The test order in steps b-d may be interchanged.
The visual field of the camera can be in other shapes, the angle of the camera can be adjusted according to actual test requirements, and a test chart of the edge of the visual field meeting the test requirements is shot.
And e, calculating the resolution of the camera 1 according to the test image at the center of the field of view and the test image at the edge of the field of view.
In the steps b to d, the angle of the camera 1 is adjusted by the computer device 5 issuing a control command to the driving motor 4, the driving motor 4 driving the rotating mechanism 3 to rotate, and the rotating mechanism 3 driving the fixing portion 2 to rotate to adjust the angle of the camera 1.
In the present invention, "upper left", "lower left", "upper right", and "lower right" are used only to indicate relative positional relationships between the respective edge positions.
Referring to fig. 5, a method for testing the resolution of a camera according to a second embodiment of the present invention is shown, which includes the following steps:
and f, providing a plane 100, wherein the plane 100 is provided with three test patterns 200, the three test patterns 200 are positioned on the same straight line, and the middle test pattern is positioned at the center of the plane 100.
And g, adjusting the position and the angle of the camera 1 to ensure that the center of the visual field 300 of the camera 1 is aligned with the test pattern 200 at the central position, and respectively aligning the other two test patterns 200 in the upper left edge position and the lower right edge position of the visual field 300 of the camera 1 to shoot a first test picture.
And h, adjusting the angle of the camera 1 to enable the left lower edge position and the right upper edge position of the visual field 300 of the camera 1 to be respectively aligned with the other two test patterns 200 so as to shoot a second test picture.
And i, calculating the resolving power of the camera 1 according to the first test image and the second test image.
Because the plane 100 is designed with three test images 200, in step g, test images of the fields of view at the center position, the upper left edge position and the lower right edge position can be captured, and in step h, test images of the fields of view at the center position, the lower left edge position and the upper right edge position can be captured, and the resolution of the camera can be calculated by using the test images.
In another embodiment, a method for testing the resolution of a camera is provided, which comprises the following steps:
and j, providing a plane, wherein the plane is provided with three test patterns, the three test patterns are positioned on the same straight line, and the middle test pattern is positioned in the center of the plane.
And k, adjusting the position and the angle of the camera to enable the center of the visual field of the camera to be aligned with the test pattern at the center position, and aligning the other two test patterns in the left lower edge position and the right upper edge position of the visual field of the camera respectively to shoot a first test picture.
And step m, adjusting the angle of the camera so that the left upper edge position and the right lower edge position of the visual field of the camera are respectively aligned to the other two test patterns to shoot a second test picture.
And n, calculating the resolving power of the camera according to the first test image and the second test image.
Because the plane is designed with three test images, the test images of the view fields at the central position, the left lower edge position and the right upper edge position can be shot in the step k, the test images of the view fields at the central position, the left upper edge position and the right lower edge position can be shot in the step m, and the resolving power of the camera can be calculated by using the test images.
According to the method for testing the resolution of the camera, the test images of the center and the edge of the visual field of the camera are collected by adjusting the angle of the camera, so that the test space is reduced, and the test cost is reduced.
For those skilled in the art, the foregoing process of adjusting the angle of the camera may be implemented in a hardware manner, a software manner, or a combination of hardware and software. Fig. 6 is a block diagram showing an example of a hardware configuration of a computer apparatus that can be used to implement an embodiment of the present invention. The computer apparatus 500 includes a processor 3010, a memory 3020, an interface device 3030, a communication device 3040, a display device 3050, an input device 3060, a speaker 3070, a microphone 3080, and the like.
The memory 3020 is configured to store instructions for controlling the processor 3010 to operate to perform the method of adjusting the angle of a camera according to any of the preceding claims.
The processor 3010 may be, for example, a central processing unit CPU, a microprocessor MCU, or the like. The memory 3020 includes, for example, a ROM (read only memory), a RAM (random access memory), a nonvolatile memory such as a hard disk, and the like. The interface device 3030 includes, for example, a USB interface, a headphone interface, and the like. The communication device 3040 can perform wired or wireless communication, for example. The display device 3050 is, for example, a liquid crystal display panel, a touch panel, or the like. The input device 3060 may include, for example, a touch screen, a keyboard, and the like. A user can input/output voice information through the speaker 3070 and the microphone 3080.
The computer device shown in FIG. 6 is illustrative only and is not intended to limit the invention, its application, or uses in any way. It will be appreciated by those skilled in the art that although a plurality of devices are shown in fig. 6, the present invention may relate to only some of the devices therein. Those skilled in the art can design instructions according to the disclosed aspects, and how the instructions control the operation of the processor is well known in the art, and therefore, will not be described in detail herein.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. It will be apparent to those skilled in the art that the above embodiments may be used alone or in combination with each other as desired. In addition, for the device embodiment, since it corresponds to the method embodiment, the description is relatively simple, and for relevant points, refer to the description of the corresponding parts of the method embodiment. The system embodiments described above are merely illustrative, in that modules illustrated as separate components may or may not be physically separate.
In addition, 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 invention. 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 computer program product provided in the embodiment of the present invention includes a computer-readable storage medium storing a program code, where instructions included in the program code may be used to execute the method described in the foregoing method embodiment, and specific implementation may refer to the method embodiment, which is not described herein again.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, 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 process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope of the invention. The scope of the invention is defined by the appended claims.
Claims (9)
1. A method for testing the resolution of a camera is characterized by comprising the following steps:
providing a plane, wherein a test pattern is arranged at the center of the plane;
adjusting the position and the angle of the camera to ensure that the center of the visual field of the camera is over against the test pattern so as to shoot a test image at the center of the visual field;
adjusting the angle of the camera so that the edge position of the field of view of the camera is aligned with the test pattern to shoot a test image of the edge of the field of view;
and calculating the resolution of the camera according to the test image at the center of the field of view and the test image at the edge of the field of view.
2. The method of claim 1, wherein the adjusting the angle of the camera such that the edge position of the field of view of the camera is aligned with the test pattern to capture a test image of the edge of the field of view comprises: and adjusting the angle of the camera so that the upper left edge position, the lower left edge position, the upper right edge position and the lower right edge position of the view field of the camera are respectively aligned with the test pattern to respectively shoot the test images of the view fields of the four edge positions.
3. The method according to any one of claims 1 or 2, wherein a field angle of the camera is 100 degrees or greater.
4. A method for testing the resolution of a camera is characterized by comprising the following steps:
providing a plane, wherein the plane is provided with three test patterns, the three test patterns are positioned on the same straight line, and the middle test pattern is positioned in the center of the plane;
adjusting the position and the angle of the camera so that the center of the field of view of the camera is aligned with the test pattern at the center position, and the other two test patterns are respectively aligned in the upper left edge position and the lower right edge position of the field of view of the camera to shoot a first test picture; adjusting the angle of the camera so that the left lower edge position and the right upper edge position of the visual field of the camera are respectively aligned with the other two test patterns to shoot a second test picture; or,
adjusting the position and the angle of the camera so that the center of the field of view of the camera is aligned with the test pattern at the center position, and the other two test patterns are respectively aligned in the lower left edge position and the upper right edge position of the field of view of the camera to shoot a first test picture; adjusting the angle of the camera so that the left upper edge position and the right lower edge position of the visual field of the camera are respectively aligned with the other two test patterns to shoot a second test picture;
and the number of the first and second groups,
and calculating the resolution power of the camera according to the first test image and the second test image.
5. The method of claim 4, wherein the field angle of the camera is equal to or greater than 100 degrees.
6. The utility model provides an equipment for adjusting the angle of camera is with test camera resolution power, its characterized in that, including driving motor and with the slewing mechanism that driving motor connects, slewing mechanism is configured to wind under driving motor's the drive motor with slewing mechanism's tie point rotates, slewing mechanism is equipped with and is used for fixing the fixed part of camera.
7. The apparatus of claim 6, further comprising a control device that controls the action of the drive motor in a wired or wireless manner.
8. The apparatus of claim 6, wherein the control device is a computer device.
9. The apparatus according to any one of claims 6 to 8, wherein a field angle of the camera is 100 degrees or more.
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| CN107749981B (en) * | 2017-11-15 | 2024-01-30 | 歌尔光学科技有限公司 | Camera field angle measurement method and system |
| CN110602401A (en) * | 2019-09-17 | 2019-12-20 | 维沃移动通信有限公司 | Photographing method and terminal |
| CN113064247A (en) * | 2021-03-29 | 2021-07-02 | 南昌欧菲光电技术有限公司 | Multi-lens group shooting lens correction method and detection system |
| CN114125303A (en) * | 2021-11-30 | 2022-03-01 | 重庆紫光华山智安科技有限公司 | Test image acquisition method, device, equipment and medium |
| CN114125303B (en) * | 2021-11-30 | 2023-08-25 | 重庆紫光华山智安科技有限公司 | Test image acquisition method, device, equipment and medium |
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