CN114157860A - Test system and test method based on test graphics card - Google Patents
Test system and test method based on test graphics card Download PDFInfo
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- CN114157860A CN114157860A CN202111571773.1A CN202111571773A CN114157860A CN 114157860 A CN114157860 A CN 114157860A CN 202111571773 A CN202111571773 A CN 202111571773A CN 114157860 A CN114157860 A CN 114157860A
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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 provides a test system and a test method based on a test graphic card, which are used for testing a camera module and comprise a drawing device, a display screen and a test module, wherein the drawing device is used for drawing and storing an electronic file test graphic card, the display screen is connected with the drawing device, and the test module is connected with the camera module; the display screen is used for projection display of a test graphic card in the drawing device, and the test module comprises an image acquisition unit connected with the camera module, and a display unit and an analysis module which are respectively connected with the image acquisition unit. The test method comprises the following steps: and projecting the test graphic card on a display screen, and testing the camera module by using the test graphic card. The test system and the test method of the invention save the production cost, facilitate the storage and improve the test efficiency of the camera module test.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of camera module detection, in particular to a test system and a test method based on a test graphic card.
[ background of the invention ]
Nowadays, camera modules are standard configurations of most kinds of electronic equipment, and it is necessary to test the configured camera modules before the electronic equipment leaves the factory.
In the traditional test process of the camera module, a test chart card, which is called a test chart card for short in the industry, is required to be used in tests related to images such as AA (active Al alignment), focusing, final inspection, PDAF (phase Detection Auto focus), calibration, verify and the like for different camera modules. The test chart is usually printed with a drawn pattern by using a film or the like, and the printed test chart is attached to a backlight plate for use. Therefore, for different camera modules and different test stations of the same camera module, one test chart card needs to be manufactured and printed separately, and in addition, in order to meet the requirement that a plurality of test charts are required to be printed when each test chart card is used in factory production, the production cost is increased; after the project is finished, the test chart is basically in an idle state, the secondary utilization rate is low, and the resource waste is caused; as the number of production items increases, the number and types of test cards increase, and the storage of test cards becomes a problem.
[ summary of the invention ]
The invention aims to provide a test system of a camera module, which can save production cost, is convenient to store and can reduce test time cost.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a test system based on a test graphic card is used for testing a camera module and comprises a drawing device, a display screen and a test module, wherein the drawing device is used for drawing and storing an electronic file test graphic card; the display screen is used for projecting and displaying the test graphic card in the drawing device, and the test module comprises an image acquisition unit connected with the camera module.
Preferably, the drawing device is provided with drawing software for drawing the test chart and a storage module for storing the electronic file test chart.
Preferably, the test module further comprises a display unit and an analysis unit respectively connected with the image acquisition unit.
Preferably, the test system further comprises a relay lens arranged between the camera module and the display screen.
Preferably, the test system further comprises a light shield, and the camera module, the relay lens and the display screen are arranged in the light shield.
Another objective of the present invention is to provide a method for testing a camera module.
A test method based on a test graphic card is used for testing a camera module and comprises the following steps:
s1: drawing an electronic file test chart card according to the test requirement of the camera module;
s2: storing the electronic file test chart into a drawing device, and projecting and displaying the electronic file test chart in a display screen;
s3: and capturing the test image card image displayed on the display screen by using the camera module, acquiring the test image and transmitting the test image to the image acquisition unit.
Preferably, after step S3, the method further includes: and respectively transmitting the test image information stored by the image acquisition unit to a display unit and an analysis unit, and evaluating the test image by the analysis unit to obtain the test parameters of the camera module.
Preferably, in step S2, the method further includes: and adjusting the display parameters of the display screen to fully display the electronic file test chart on the whole display screen.
Preferably, in step S3, the method further includes: when the test image is obtained, the central shaft of the camera module and the center of the test chart are positioned on the same axis.
Preferably, the electronic document test chart is in a PDF format.
The invention has the beneficial effects that:
when the test system based on the test chart is used for testing the camera module, the electronic chart file of the test chart card is selectively drawn by drawing software according to the test requirement of the camera module to be tested to obtain the electronic file test chart card, and then the electronic file test chart card is projected on the display screen. So use one set of test system, can realize testing the different parameters of the camera module of multiple specification model, improved test system's commonality, reduced test cost and improved efficiency of software testing.
The invention adopts the technical means of projecting the electronic file test chart on the display screen to replace the technical means of attaching the printed test chart on the backlight plate in the traditional test method, thereby achieving the purpose of once and for all, aiming at all newly developed camera projects, only the electronic file test chart needs to be manufactured and then converted into the required file format. The material cost for printing the test chart is saved, the influence of dirt, surface wrinkles and test chart selection errors of the printed test chart on the test result of the camera module is avoided, and the accuracy of the test of the camera module is ensured; the test chart is convenient to store, the electronic file test chart file is directly stored in the hard disk, and a special storage space does not need to be divided for the test chart; if the specification of the camera module to be tested is not changed, the previous electronic file test chart can be directly called from the stored electronic file for testing, so that the test is convenient and quick; the electronic file test card can be directly used after being designed, and raw materials for manufacturing the test card do not need to be purchased, so that the time cost is reduced, and the test efficiency is further improved.
[ description of the drawings ]
FIG. 1 is a schematic diagram of a test system according to the present invention;
FIG. 2 is a flow chart of the testing method of the present invention.
[ detailed description ] embodiments
The invention is further described with reference to the following figures and embodiments.
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Example 1
A test system of a camera module is used for testing the camera module 1, FIG. 1 is a schematic diagram of the test system of the invention, as shown in FIG. 1, the test system comprises a drawing device 2 used for drawing and storing an electronic file test chart, a display screen 3 connected with the drawing device 2 and used for projecting the electronic file test chart, and a test module 4 connected with the camera module 1; the test module 4 comprises an image acquisition unit 41 connected with the camera module 1.
The test module 4 further includes a display unit 42 and an analysis unit 43, which are respectively connected to the image acquisition unit 41 and are used for monitoring the state of the test image in real time, and analyzing the test image.
The drawing device 2 is provided with drawing software for drawing the test chart and a storage module for storing the electronic file test chart.
The drawing software is preferably AutoCAD, and is provided in the drawing device 2. The drawing device 2 is electrically connected to the display screen 3. After the drawing software draws the test chart, obtaining an electronic file test chart, and then storing the electronic file test chart as a required format file, preferably in a PDF format, a JPG picture format or a PNG picture format, and further preferably in a PDF format; and then storing the electronic drawing file stored by the drawing software and the format file of the electronic test drawing card after storage in the storage module. Optionally, if the number of the electronic file test cards is larger, the electronic file test cards may be stored in the mobile hard disk. Alternatively, the drawing device 2 and the display screen 3 may be provided in the same local area network and connected by a wireless signal line.
The test chart comprises but is not limited to a chart with chart and test phase focusing, and the background of the test chart is medium gray when the test chart is drawn. The image display surface of the display screen 3 faces towards one side of the camera lens of the camera module 1, and the front of the display screen 3 is perpendicular to the camera lens.
The types of the test graphic cards comprise checkerboard test graphic cards aiming at the analytic force test, test graphic cards aiming at the diamond patterns and test graphic cards aiming at the bar patterns, and the arrangement angle of the test graphic cards can be adjusted by adjusting the projection angle of the electronic file test graphic cards on the display screen 3 during the test, so that the applicability and the test efficiency of the test system are improved.
The test system further comprises a relay lens 5 arranged between the camera module 1 and the display screen 3. The relay lens 5 can accurately simulate different test distances to meet the test requirements of different high-pixel camera modules 1, shorten the test distance, save the test space and reduce the test error.
The camera module 1, the relay lens 5 and the display screen 3 are arranged in the lens hood 6. Optionally, a light source for providing auxiliary light for shooting by the camera module 1 is arranged in the light shield 6, so that the standard color temperature in the light shield 6 is referred to during testing: d65 international standard artificial sunlight, TL84 Europe, Japanese shop light source, F lamp sunset yellow light source, etc., the color temperature deviation is not more than 100K. The temperature in the test environment was 20 ℃. + -. 2 ℃ and the relative humidity was 50%. + -. 20%.
The distance between the display screen 3 and the camera module 1 is adjustable. Specifically, the camera module 1 to be tested can be arranged on a movable support frame, and similarly, the display screen 3 can be arranged on a movable driving mechanism, so that the distance between the test graphic card and the camera module can be adjusted, and the camera module 1 to be tested can capture a clear test image which meets the test requirements of the test graphic card. The screen brightness of the display screen 3 is adjustable, so that the surface brightness of the display screen 3 during testing can enable the camera equipment to output enough signals when shooting a test card. In addition, when different test graphics need to be replaced, only the display screen 3 needs to be controlled to turn pages, so that the operation time for dismounting the test graphics is saved, and the efficiency of the analytic force test is further improved.
Fig. 2 is a flowchart of the testing method of the present invention, and as shown in fig. 2, the testing system of the present invention is used to test the camera module 1, and includes the following steps:
s1: drawing an electronic file test chart card according to the test requirement of the camera module 1;
s2: storing the electronic file test chart into a drawing device, and projecting and displaying the electronic file test chart in a display screen 3;
s3: and the camera module 1 is used for capturing the test chart image displayed on the display screen 3, acquiring the test image and transmitting the test image to the image acquisition unit 41.
After step S3, the method further includes transmitting the test image information stored by the image acquisition unit 41 to the display unit 42 and the analysis unit 43, respectively, and the analysis unit 43 evaluates the test image based on a preset algorithm to obtain the test parameters of the camera module 1.
Specifically, after the image acquisition unit 41 receives the test image output by the camera module 1, the test image is respectively transmitted to the display unit 42 and the analysis unit 43, the display unit 42 can visually monitor the shooting state of the test image, and whether the test image meets the test requirement is preliminarily judged. The display unit 42 judges whether the testing position is correct according to the real-time transmitted picture of the camera module 1, and if not, the relative position between the camera module 1 and the display screen 3 is conveniently adjusted in time so as to ensure the accuracy of the testing result.
Specifically, when evaluating the definition of the camera module 1, the analysis unit 43 calculates the information of the test image according to a preset algorithm, and then draws a visual heat map according to the calculation result, wherein different definitions are marked with different colors.
In the operation process of step S2, the display parameters of the display screen 3 are adjusted so that the electronic document test chart is displayed on the whole display screen 3. Make the test chart card spreads the whole screen of display screen 3 fully, has made things convenient for simultaneously the test chart card is full of the whole shooting system field of vision of camera module 1 has reduced the optical distortion among the test procedure.
In step S3, the method further includes: when a test image is obtained, the central axis of the camera module 1 and the center of the test chart are located on the same axis, that is, the optical axis of the camera module 1 passes through the center of the test chart.
Optionally, the display screen 3 has a brightness adjustment function, and the display screen 3 can replace a backlight board used in a conventional test method, that is, the test card is directly projected on the display screen 3 to replace a step of attaching the test card to the backlight board in the conventional test method, so that the operation time of attaching the test card to the backlight board and the time of rechecking the attached test card are saved, and meanwhile, a test result error caused by an improper attachment position of the test card is avoided.
The above examples only express preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A test system based on a test graphic card is used for testing a camera module and is characterized by comprising a drawing device, a display screen and a test module, wherein the drawing device is used for drawing and storing an electronic file test graphic card; the display screen is used for projecting and displaying the test graphic card in the drawing device, and the test module comprises an image acquisition unit connected with the camera module.
2. The test system of claim 1, wherein the drawing device is configured with drawing software for drawing a test card and a storage module for storing the electronic file test card.
3. The test system of claim 1, wherein the test module further comprises a display unit and an analysis unit respectively connected to the image acquisition unit.
4. The test system of claim 1, further comprising a relay lens disposed between the camera module and the display screen.
5. The testing system of claim 4, further comprising a light shield, wherein the camera module, the relay lens and the display screen are disposed in the light shield.
6. A test method based on a test graphic card is used for testing a camera module and is characterized by comprising the following steps:
s1: drawing an electronic file test chart card according to the test requirement of the camera module;
s2: storing the electronic file test chart into a drawing device, and projecting and displaying the electronic file test chart in a display screen;
s3: and capturing the test image card image displayed on the display screen by using the camera module, acquiring the test image and transmitting the test image to the image acquisition unit.
7. The testing method of claim 6, after step S3, further comprising: and respectively transmitting the test image information stored by the image acquisition unit to a display unit and an analysis unit, and evaluating the test image by the analysis unit to obtain the test parameters of the camera module.
8. The testing method according to claim 6, wherein in step S2, further comprising: and adjusting the display parameters of the display screen to fully display the electronic file test chart on the whole display screen.
9. The testing method according to claim 6, wherein in step S3, further comprising: when the test image is obtained, the central shaft of the camera module and the center of the test chart are positioned on the same axis.
10. The method according to claim 6, wherein the electronic file test card is in PDF format.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111571773.1A CN114157860A (en) | 2021-12-21 | 2021-12-21 | Test system and test method based on test graphics card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111571773.1A CN114157860A (en) | 2021-12-21 | 2021-12-21 | Test system and test method based on test graphics card |
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| Publication Number | Publication Date |
|---|---|
| CN114157860A true CN114157860A (en) | 2022-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111571773.1A Pending CN114157860A (en) | 2021-12-21 | 2021-12-21 | Test system and test method based on test graphics card |
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| CN (1) | CN114157860A (en) |
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2021
- 2021-12-21 CN CN202111571773.1A patent/CN114157860A/en active Pending
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Address after: 530031 plant of powder injection workshop, No. 100 Gaoling Road, Nanning City, Guangxi Zhuang Autonomous Region Applicant after: AAC Optics (Nanning) Technologies Co.,Ltd. Address before: 530031 plant of powder injection workshop, No. 100 Gaoling Road, Nanning City, Guangxi Zhuang Autonomous Region Applicant before: Chengrui optics (Nanning) Co.,Ltd. |
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