TWI330981B - Shading detecting apparatus and method for camera module - Google Patents

Description

[0001] [0001] [0001] [0004] [0005] 096111590 July 14, 2004 invention description: [Technical Field] The present invention relates to camera module testing technology, and more particularly to a camera module vignetting A detecting device and a camera module vignetting detecting method using the camera module vignetting detecting device. [Prior Art 3 To meet the requirements of consumers and improve the portability of electronic products, the size of portable electronic products such as mobile phones is getting smaller and smaller. Correspondingly, the size of the camera module mounted on the portable electronic product is also reduced. However, the camera module size is too small to cause vignetting (Shading). Camera lens distortion, small image defects such as image sensing wafers and lens misalignment can cause camera modules to produce vignetting. In order to avoid the defects in the production process, the camera module produces a vignetting angle. After the camera module is assembled, it needs to pass the dark corner debt measurement process to judge whether the quality of the camera module is qualified. The traditional vignetting detection process is generally performed by manual visual inspection, which is easy to misjudge. The detection standards of each camera module are not uniform, and the detection efficiency is low. SUMMARY OF THE INVENTION It is necessary to provide a camera module vignetting detection device and a camera module vignetting detection method that can accurately and quickly _ camera module. A camera module vignetting detection data processor includes a brightness reading module and a second calculating unit, and the brightness reading module is configured to read a plurality of predetermined frames in the image generated by the camera module to be tested. The brightness of the area L is used to compare the complex brightness values read by the brightness reading module == Form Editors 帛 3 pages / Total 25 pages 0993252427-0 Straight 'total a Becker processor 1330981

On July 14, 099, the difference between the true I 7C degrees is corrected, and it is determined whether the difference exceeds the corresponding domain value, and when the difference exceeds the corresponding domain value, it is determined that the camera module to be tested is dark. And determining that the camera module to be tested is qualified when the difference does not exceed the corresponding domain value. [〇〇〇6] A camera module vignetting detection method uses a camera module vignetting detection device to detect whether there is a vignetting angle of a camera module to be tested. The camera module vignetting detection device includes a data processor, the data processor includes a brightness reading module and an operation determining module, and the intended reading module is used to read the camera to be tested. The brightness value of the predetermined predetermined detection area in the plane generated by the module. The operation determining module is configured to compare the difference between the predetermined brightness values of the plurality of brightness values read by the brightness reading module, and determine whether the difference exceeds a corresponding domain value. The camera module vignetting detection method includes: [〇〇〇7] connecting the camera module to be tested and the camera module vignetting detection device, selecting the camera module to be tested and waiting for the camera module to be tested The group forms a stable rectangular facet [_], and the brightness reading module reads the brightness value of the rectangular detection complex predetermined detection area. [〇〇〇9] The operation judging module compares the difference between the predetermined brightness values of the plurality of brightness values read by the brightness reading module, and determines whether the difference exceeds the corresponding domain value, and if the difference is obtained If the corresponding domain value is exceeded, the camera module to be tested has a vignetting angle. Otherwise, the camera module to be tested is qualified. [0010] The detection ends. [0011] A camera module vignetting detection method, comprising: 096111590 Form No. A0101 Page 4 / Total 25 Pages 1339081 Correction Replacement Page of July 14, 2008 [0012] Reading the camera module to be tested And comparing a brightness value of the predetermined detection area in the kneading surface; [0013] comparing a brightness value difference between the predetermined brightness values of the brightness values of the plurality of predetermined detection areas, and determining whether the difference exceeds a corresponding domain value; If the difference exceeds the corresponding domain value, the camera module to be tested has a vignetting angle. Otherwise, the camera module to be tested is qualified; the detection ends.

[0014] The camera module vignetting detection method uses the camera module vignetting detection device to read the brightness value of the plurality of predetermined detection regions in the rectangular image generated by the camera module to be tested, and compares the plurality of predetermined detections The difference in the brightness value of the measurement area determines whether there is a vignetting angle of the camera module to be tested, and can accurately determine whether there is a vignetting angle of the camera module to be tested, and the detection standard of each camera module to be tested is unified, and the detection efficiency is high. Embodiments [0015] First Embodiment

[0016] The camera module vignetting detection apparatus of this embodiment includes a data processor. Please refer to FIG. 1 , which is a functional module diagram of the data processor 10 . The data processor 10 includes a brightness reading module 11 and an operation determining module 12. The brightness reading module 11 is configured to read the brightness values of the plurality of predetermined detection areas in the pupil plane generated by the camera module to be tested. The operation determining module 12 is configured to compare the difference between the predetermined brightness values of the plurality of brightness values read by the brightness reading module 11 and determine whether the difference exceeds a corresponding domain value. [0017] Preferably, the data processor 10 further includes a data unit 13, and the brightness reading module 11 reads the camera module to be tested by the data 埠13, 096111590, form number A0101, page 5 / total 25 pages 0993252427-0 1330981 [0020] [0020] The brightness value of the predetermined indignant area in the picture of the year of July 2007. The data 埠1 can be a Universal Serial Bus (USB) 埠, or an IEEE 1394 according to the International Electric and Electrical Engineering Association (IEEE) specification. . In addition, the data processor further includes a storage module 14 for storing the brightness value read by the brightness reading module u, and the operation determining module 12 reads from the storage module 14 Take the brightness value of the comparison. Of course, the data processor 1 is not limited to the embodiment, and other function modules may be added to optimize information processing performance. Specifically, the data processor 10 can employ a single chip microcomputer, a computer, or other programmable smart device. This embodiment uses a computer. Please refer to FIG. 2 , which is a perspective view of the camera module vignetting detecting device 1 of the embodiment. The camera module vignetting detection device 1 is configured to detect whether there is a vignetting angle on the side camera module 20, and includes the data processor ι and a test platform 30. The test platform 30 includes a fixed plate 31 for fixing the camera module 20 to be tested, a light source 32 disposed opposite to the fixed plate 31, and a transfer for converting the output of the thief (4) to be tested (4). a circuit (10) and a connection between the conversion circuit board 33 and the data processor 1

[0021] 096111590 The solid 431 f money has a (four) domain touch, and its edge is set to be ancient. 〇〇 衣 又 又 又 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 321 On July 14th, the shuttle is being stabilized and the light is illuminated. The original a affects the detection result due to changes in the light environment or uneven illumination. The transit circuit board 33 is configured to convert the round-trip data of the camera-to-be-tested group 20 into the camera module vignetting, and the information that the J device 10 can take, including one for electrically connecting the camera to be tested The electrical connector 33 of the module 20 includes at least one data processing chip 332 and a data output port 333 for electrically connecting the camera module vignette detecting device 1 . Corresponding to the data 埠13 of the camera module vignetting detection device 1 , the data output port 333 is a USB port. The data line 34 is connected to the conversion circuit board 33 and the data processor 1 by connecting the data output port 333 and the data port 13 by using a USB connection. [0022] Of course, if the data 埠 13 adopts other types such as IEEE 1394, the data output 埠 333 should adopt a corresponding type 埠, and connect the data output 埠 333 with the corresponding type of data line 34 and the Information 埠 13. [0023] It can be understood that the test platform 30 is not limited to the embodiment, and other devices capable of forming a stable picture by the camera module 2 to be tested may be used instead of the test platform 30. [0024] Please refer to FIG. 3' is a flow chart of the camera module vignetting detection method of the present embodiment. The camera module vignetting detection method comprises the following steps: [0025] P1: connecting the camera module 20 to be tested and the camera module vignetting detecting device 10, turning on the camera module 20 to be tested and waiting for testing The camera module 2〇 forms a stable rectangular picture. [0026] P2: The brightness reading module 11 reads the brightness values of the plurality of predetermined areas in the rectangular picture. [0027] Ρ3: The operation judging module 12 reads the 096111590 form number Α0101 page 7/total 25 page 0993252427-0 1330981 _, July 14, 2010 [0028] [0030] [0031] The difference between the brightness values of the plurality of brightness wealth of July 14th, 099, and whether the difference obtained exceeds the corresponding domain value; if the difference exceeds the domain value of (4), the test is to be tested. There is a vignetting angle in the camera module (4), (4), the camera module to be tested is not qualified. The detection ends. For the step P1, the table is selected. The mounting hole is fastened to the data terminal 21, and the data terminal 21 is inserted into the member 322, and the camera module 20 to be tested is electrically connected. Mori 33 uses the USB connection 34 connection == machine module vignetting _ device 1 〇 data (4) and the transfer material wheel exit 333, thereby connecting the camera model and the vignetting detection device 1 to be tested. . The test platform 30 is turned on, and the camera module 20 to be tested can be started through the test platform 3(). For the step P2, 讅佥> FIG. 4, the detection area distribution map of the present embodiment, the Wei (4) area of the embodiment includes five first-test areas bl~b5 and four _~ detection Area sl~s4. The five first detection areas are disposed on the four corners and the center of the rectangular surface I, and the four second detection areas are located on the rectangular surface I. Within the first detective area. Specifically, the five first detection areas bl~b5 have the same area. The four second detection area groups iim have the same knowledge. Thus, the brightness reading mode of the brightness reading mode has a high comparability, which can reduce the complexity of subsequent operations. Spirit Every move, j area with the rectangle picture! The area ratio is 1/64 1/25 ’. The ratio of the area of each second price measurement area to its area is 1/3 fi 1/1β. In this embodiment, each of the first detections 096111590 form number Α 010 Ι page 8 / total 25 pages 0993252427-0 1330981

In July of the next year, the area ratio of the area to the rectangular picture I is i/36, and the area ratio of each second detection S~ field to the first detection area where it is located is 1/25. Of course, the area ratio is not limited to the embodiment, and the visual detection needs. Generally, the area ratio of the first detection area to the rectangular picture is not excessive, otherwise the first detection area cannot represent the brightness of the corner of the rectangular picture, and the second detection area and the first The area ratio of the detection area should not be too large. Otherwise, the difference between the light and dark in the first detection area cannot be characterized. The smaller the area ratio is, the higher the quality requirement of the detector module to be tested. [0032] In the embodiment, the five first detection areas b1 to b5 and the four second detection areas si to s4 are rectangular areas of the rectangular picture! The first detection area bl ~ b4 and the four second detection areas s 丨 四个 of the four corners fall on the edge of the rectangular picture I. That is, the 4th - '^ 贞 区域 bl bl b b b b b b b b b b b b b b b b b b b b b b b b

The corners are aligned. In this way, the brightness values of the first corners of the four corners of the rectangular picture I can represent four large stomach brightness levels of the rectangular picture I, and the four second detection areas si to s4 The brightness value can be characterized and the vignetting angle is generally distributed in the four corners of the rectangular picture I. Therefore, the first detection area bl~b4 and the four second detection areas si~s4 of the four corners of the rectangular writing I Aligning with the corner where it is located is good for the detection of vignetting. The degree of brightness of the four small corners of the rectangular plane I [0033] The brightness reading module 11 stores the read complex brightness values in the storage module 14 for the operation determining module 12 to read Take the comparison. [0034] For step P3, the camera module vignetting detection method of the present embodiment compares the first detection area bl bb4 and the middle form number A0101 of the rectangular picture I of the 096111590 to the ninth page. Page heart first 0993252427-0 1330981 July 14th, 999, the difference between the brightness value of the page detection area b5, the four second detection areas ssi~s4 and the first detection area b The difference in luminance values of b4, the difference in luminance values between the first detection regions b1 to b4 of the four corners of the rectangular plane I. [0035] Please refer to FIG. 5. Specifically, the camera module vignetting detection method adopts a first luminance value calculation formula: [0036] l-Min(Bl, B2, B3, B4)/B5 [0037] The first detection area b of the four corners of the rectangular plane I is b4 and medium

The difference in brightness value of the first detection area b5 of the heart. Wherein, B B is the brightness value of the first detection areas b1 b b4 of the four corners of the rectangular face I, and B5 is the brightness value of the first detection area b5 of the center of the rectangular face I.

Min (Bl, B2, B3, B4) represents the minimum value of B B B4.

[0038] The operation determining module 12 determines whether the first brightness value calculation formula is greater than the corresponding first domain value. If it is greater than the corresponding first domain value, it indicates that at least one first detection area is too dark in the first detection area b b4 of the four corners of the rectangular plane I, and at least one first detection area has a vignetting angle , and is the first vignetting angle D1 of a large area. Referring to FIG. 6, the camera module vignetting detection method of the embodiment adopts a second luminance value calculation formula: [0040] Min (Sl/Bl, S2/B2, S3/B3, S4/B4) [ 0041] Align the brightness values of the four second detection areas s 1 s 4 and the first detection area where they are located. Wherein, S Bu S4 is the brightness value of the four second detection areas s s4, B B B4 is the first 096111590 of the four corners of the rectangular picture Form No. A0101 Page 10 / Total 25 Page 0993252427-0 1330981

On July 14, 099, the brightness value of the bl~b4 area of the detection area is replaced. Min (Sl/Bl, S2/B2, S3/B3, S4/B4) indicates that S1/Bl, S2/B2, S3/ are taken. B3, the minimum value in S4/B4. [0042] The operation determining module 12 determines whether the second brightness value calculation formula is smaller than the corresponding second domain value. If it is smaller than the corresponding second domain value, it indicates that the first detection areas b1 b b4 of the four corners of the rectangular picture I have at least one first detection area whose internal light and dark difference does not meet the requirement, and at least one second detection area There is a vignetting angle, which is the second dim angle D2 of the small area. Referring to FIG. 7, the camera module vignetting detection method of the embodiment adopts a third brightness value calculation formula: [0044] Max(Bl, B2, B3, B4)/Min(Bl, B2, B3, B4) [0045] Aligning the difference in luminance values between the first detection areas b1 to b4 of the four corners of the rectangular picture I. Where B B4 is the brightness value of the first detection area b b4 of the four corners of the rectangular face, and Max (Bl, B2, B3, B4) represents the maximum value of B1~B4, Min (Bl , B2, B3, B4) means taking the minimum value of B1~B4. [0046] The operation determining module 12 determines whether the third brightness value calculation formula is greater than a corresponding third domain value. If it is greater than the corresponding third domain value, it indicates that the difference between the first detection regions bl bb4 of the four corners of the rectangular plane I is not satisfactory, and at least one first detection region memory is at the vignetting angle. And is the third vignetting angle D3 of the medium area. [0047] The specific values of the first domain value, the second domain value, and the third domain value depend on actual detection conditions and detection requirements. The actual detection conditions include the illumination intensity of the stable light source during detection, the first detection area and the face of the rectangular screen 096111590 Form No. A0101 Page 11 of 25 0993252427-0 1330981 The rotation of the shuttle is being replaced on July 14 The page product ratio and the area ratio of the second detection area to the first detection area, the detection requirement is mainly the requirement of the detector to measure the quality of the camera module [0048] if the first brightness value is The calculation formula, the second brightness value calculation formula and the third brightness value calculation formula and the corresponding judgments do not measure that there is a vignetting angle of the camera module 20 to be tested, and the camera module 20 to be tested satisfies the detection requirement, and the camera module to be tested Group 20 does not have a vignetting angle or its vignetting angle is within the range allowed by the detection request, and the detection is completed.

[0049] Of course, the comparison and determination steps of the operation judging module 12 are not limited to the embodiment, and other brightness value comparison calculation formulas or other comparison methods may be used for comparison and judgment.

[0050] The camera module vignetting detection method uses the camera module vignetting detection device 10 to read the brightness of the plurality of predetermined detection areas of the corner and the center of the rectangular picture I generated by the camera module 20 to be tested. The value is determined by comparing the brightness value difference of the predetermined predetermined detection area to determine whether there is a vignetting angle of the camera module 20 to be tested, and whether the camera module 20 to be tested has a vignetting angle and the detection of each camera module to be tested is accurately determined. The standard is unified and the detection efficiency is high. [0051] The second embodiment of the present invention is different from the camera module vignetting detection method of the first embodiment in that the first detection area and the second detection The shape of the measurement area is different. Referring to FIG. 8, the five first detection areas bla~b5a and the four second detection areas sla~s4a in this embodiment are all right triangle regions, and the first four corners of the rectangular picture I are used. Debt test area b 1 a ~ b 4 a and four second blessing 096111590 Form No. A0101 Page 12 of 25 0993252427-0 1330981 July 14th, 999, the right angle of the sla~s4a The edge falls on the edge of the rectangular face I. That is, the first detection areas b la to b4a and the four fourth detection areas sla to s4a of the four corners of the rectangular plane I are aligned with the corner where they are located. [0054] In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art of the present invention should be included in the following claims.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a functional block diagram of a data processor according to a first embodiment of the present invention; [0056] FIG. 2 is a camera module vignetting detecting device according to a first embodiment of the present invention; 3 is a flow chart of a camera module vignetting detection method according to a first embodiment of the present invention; [0058] FIG. 4 is a distribution area of a detection area according to a first embodiment of the present invention;

5 is a first detection screen of the first embodiment of the present invention; [0060] FIG. 6 is a second detection diagram of the first embodiment of the present invention; [0061] FIG. A third detection screen of the first embodiment of the invention; [0062] FIG. 8 is a diagram of a detection area distribution according to a second embodiment of the present invention. [Main component symbol description] [0063] Vignette detecting device: 100 [0064] Fastener: 322 096111590 • Form number A0101 Page 13 of 25 0993252427-0 1330981 [0065] Data processor: 10 [0066] Light source: 3 2 [0067] Brightness reading module: 11 [0068] Transfer board: 33 [0069] Operation judgment module: 12 [0070] Electrical connector: 331 [0071] Information: 13 [0072] Greedy Processing Chip · 332 [0073] Memory Module: 14 [0074] Data Output: 333 [0075] Side Camera Module: 20 [0076] Data Line: 34 [0077] Data Terminal: 21 [0078] Rectangle Screen: I [0079] Test Platform: 30 [0080] First Detection Area: bl~b5, [0081] Fixed Plate: 31 [0082] Second Detection Area: si~s4, [0083] Mounting Hole: 321 Bla~b5a sia~s4a 096111590 Form No. A0101 Page 14 of 25 Page 999 July 14th Nuclear Replacement Page 0993252427-0

Claims (1)

1330981 On July 14, 099, press the replacement page. VII. Patent application scope: 1. A camera module vignetting detection device, the camera module vignetting detection device The data processor includes a brightness reading module and an operation determining module; the brightness reading module is configured to read a plurality of predetermined detections in the face generated by the camera module to be tested. a brightness value of the region; the operation determining module is configured to compare a difference between the predetermined brightness values of the plurality of brightness values read by the brightness reading module, and determine whether the difference exceeds a corresponding domain value, and When the difference exceeds the corresponding domain value, it is determined that the camera module to be tested has a vignetting angle, and when the difference does not exceed the corresponding domain value, it is determined that the camera module to be tested is qualified. 2. The camera module vignetting detection apparatus of claim 1, wherein the data processor further comprises a data cartridge, wherein the brightness reading module reads the data to be tested through the data The brightness value of a plurality of predetermined detection areas in the plane generated by the camera module. 3. The camera module vignetting detecting device according to claim 1, wherein The data processor further includes a storage module configured to store a plurality of brightness values read by the brightness reading module; and the operation determining module reads the brightness to be compared from the storage module value. 4. The camera module vignetting detection apparatus of claim 1, wherein the camera module vignetting detection apparatus further comprises a test platform; and the test platform includes a fixed test to be tested. a fixing plate of the camera module, a light source disposed opposite to the fixed plate, and a transit circuit board for converting output data of the camera module to be tested; the fixing plate is provided with a mounting hole for mounting the camera module to be tested, The transit circuit board includes an electrical connector for electrically connecting the camera module to be tested, and at least one material for converting data 096111590 Form No. A0101 Page 15 / Total 25 Page 0993252427-0 1330981 __ 099年07 On the 14th, the shuttle is replacing the page processing chip, and a data output for electrically connecting the data processor, the camera module vignetting detecting device according to claim 4, wherein the light source Use a surface light source. 6. The camera module vignetting detection apparatus of claim 1, wherein the plurality of predetermined detection areas include five first detection areas and four second detection areas; The first detection areas are distributed in the four corners and the center of the rectangular surface, and the four second detection areas are respectively located in the first detection areas of the four corners of the rectangular surface. 7. The camera module vignetting detection apparatus of claim 1, wherein the difference between the predetermined brightness values comprises a first detection area and a center first detection of the four corners of the rectangular surface a difference in luminance values of the measurement area, a difference in luminance values between the four second detection areas and the first detection area in which the second detection area is located, and a difference in brightness values between the first detection areas in the four corners of the rectangular picture. 8. A camera module vignetting detection method, which uses the camera module vignetting detection device according to claim 1 to detect whether there is a vignetting angle of the camera module to be tested; the camera module The vignetting detection method includes: connecting a camera module to be tested and the camera module vignetting detecting device, opening the camera module to be tested, and waiting for the camera module to be tested to form a stable rectangular picture; The group reads the brightness values of the plurality of predetermined detection areas in the rectangular picture; the operation determining module compares the difference between the predetermined brightness values of the plurality of brightness values read by the brightness reading module, and determines the obtained Whether the difference exceeds the corresponding domain value; if the difference is beyond the corresponding domain value, the camera module to be tested has a vignetting angle; otherwise, the camera module to be tested is qualified; the debt measurement ends. 096111590 Form No. A0101 Page 16 of 25 0993252427-0 1330981 f 099 July 2007 ITj Correction Replacement Page I 9. The camera module vignetting method according to claim 8 wherein the The brightness reading module reads five first-domains and four second detection areas; the five first-test areas are distributed in four corners of the rectangular picture and the center, the four The second detection areas are respectively located in the first detection areas of the four corners of the rectangular picture. 10', wherein the camera module vignetting detection method described in claim 9 is wherein the five first detecting regions have the same area, and the four second predicated regions have the same area. U. The camera module vignetting detection method of claim 9, wherein an area ratio of each of the first detecting area to the rectangular picture is i/64 1/25 'each second The ratio of the detection area to the area of the first-test area is 1/36 to 1/16. 12. The camera module vignetting detection method described in claim 9 The first detection area and the four second detection areas are rectangular areas. The first detection area of the four corners of the rectangular picture and the two adjacent sides of the four second detection areas fall on the rectangle. On the edge of the face. 13. The camera module vignetting detection method according to claim 9, wherein the five first-extraction regions and the four second debt measurement regions are right-angled digonal regions, and the rectangular kneading surface is The first debt measurement area of the corner and the two right angle sides of the four second measurement areas fall on the edge of the rectangular picture 〇14 The camera module vignetting detection method described in claim 8 The operation determining module compares the brightness value difference between the first detection area and the center first detection area of the four corners of the rectangular picture, and the four second detection areas and the first detection of the same The difference in the brightness value of the measured area, the difference in the brightness value between the - (four) areas of the four corners of the rectangular picture of 096111590. Forms of the camera module _1 Π / / 993 993 993 993 993 993 993 993 993 993 15 15 相机 相机 相机 相机 相机 相机 相机 相机 相机 相机 相机 相机 相机 相机 相机 相机 相机 相机 相机 相机 相机The operation module adopts the first brightness value calculation formula: l-Min(Bl, B2, B3, B4)/B5 compares the brightness of the first detection area and the center first detection area of the four corners of the rectangular plane Value difference; wherein, Bl, B2, B3, B4 are the brightness values of the first detection area of the four corners of the rectangular face, and B5 is the brightness value of the first detection area of the center of the rectangular picture, Min ( Bl, B2, B3, B4) means taking the minimum of Bl, B2, B3, B4. 16. The camera module vignetting detection method according to claim 14, wherein the computing module adopts a second brightness value calculation formula: Min (Sl/Bl, S2/B2, S3/B3, S4/B4) Comparing the brightness values of the four second detection areas with the first detection area where they are located; wherein, S1, S2, S3, and S4 are the brightness values of the four second detection areas, B1, B2 , B3, B4 are the brightness values of the first detection area of the four corners of the rectangular picture, and Min (Sl/Bl, S2/B2, S3/B3, S4/B4) means taking Sl/Bl, S2/B2, The minimum value in S3/B3, S4/B4. 17. The camera module vignetting detection method according to claim 14, wherein the computing module uses a third luminance value calculation formula: MaxCBl, B2, B3, B4)/Min (Bl, B2) , B3, B4) comparing the difference in luminance values between the first detection areas of the four corners of the rectangular plane; wherein, Bl, B2, B3, B4 are the first detection areas of the four corners of the rectangular picture The brightness value, Max (Bl, B2, B3, B4) indicates the maximum value of B1, B2, B3, B4, and Min (Bl, B2, B3, B4) indicates the smallest of B1, B2, B3, B4. value. 18. A camera module vignetting detection method, comprising: 096111590 Form No. A0101 Page 18/Total 25 Page 0993252427-0 1330981 Correction replacement page for reading the camera module to be tested And comparing a brightness value of the predetermined detection area; comparing a brightness value difference between the predetermined brightness values of the plurality of predetermined detection areas, and determining whether the difference exceeds a corresponding domain value; if the difference exceeds the corresponding If the field value is used, the camera module to be tested has a vignetting angle. Otherwise, the camera module to be tested is qualified; the detection ends. 0993252427-0 096111590 Form No. A0101 Page 19 of 25