CN110907139A - Camera detection method - Google Patents
Camera detection method Download PDFInfo
- Publication number
- CN110907139A CN110907139A CN201911134398.7A CN201911134398A CN110907139A CN 110907139 A CN110907139 A CN 110907139A CN 201911134398 A CN201911134398 A CN 201911134398A CN 110907139 A CN110907139 A CN 110907139A
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- target
- camera
- plate
- detection method
- mounting hole
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/0207—Details of measuring devices
- G01M11/0214—Details of devices holding the object to be tested
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/0242—Testing optical properties by measuring geometrical properties or aberrations
- G01M11/0257—Testing optical properties by measuring geometrical properties or aberrations by analyzing the image formed by the object to be tested
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/04—Optical benches therefor
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Geometry (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention relates to a camera detection method, which comprises the following steps: preparing a detection support, wherein the upper part of the support is a fixing position for fixing a camera to be detected, the lower part of the support is a workbench, and the camera to be detected fixed at the fixing position can shoot the workbench; secondly, preparing a target plate, selecting a sheet-shaped object as the target plate, and drawing or pasting a target on the surface of the target plate, wherein the target has an outer circle and a cross-shaped intersection positioned inside the outer circle; fixing the target plate on a workbench, wherein the center of a target in the target plate is on the same straight line with the central axis of the fixing position; step four, starting the camera to be tested, and taking a picture of the workbench by the camera to be tested to obtain a picture with the target; and step five, analyzing the shot picture with the target, measuring the distance between the center of the target and the center of the picture, and recording as an offset value A. The invention provides a camera detection method, which can quickly and accurately distinguish defective products in a camera.
Description
Technical Field
The invention relates to the field of detection, in particular to a camera detection method.
Background
In the manufacturing process of the camera, industrial errors inevitably occur due to the installation of the lens. In the camera industry, an agreed allowable range is provided for an error value of a camera, the camera with the error value within the allowable range can be marked as a good product, the camera with the error value exceeding the allowable range needs to be marked as a defective product, however, a high-efficiency and reliable camera defective product detection method is absent in the industry at present, the good product and the defective product cannot be quickly and accurately screened, and urgent improvement is required.
Disclosure of Invention
In view of this, the present invention provides a method for detecting a camera, which can quickly and accurately distinguish defective products in the camera.
The purpose of the invention is realized by the following technical scheme:
a camera detection method comprises the following steps:
preparing a detection support, wherein the upper part of the support is a fixing position for fixing a camera to be detected, the lower part of the support is a workbench, and the camera to be detected fixed at the fixing position can shoot the workbench;
secondly, preparing a target plate, selecting a sheet-shaped object as the target plate, and drawing or pasting a target on the surface of the target plate, wherein the target has an outer circle and a cross-shaped intersection positioned inside the outer circle;
placing a camera to be tested, fixing a target plate on a workbench, wherein the center of a target in the target plate and the central axis of the fixing position are positioned on the same straight line;
step four, shooting a test photo, starting a camera to be tested, and shooting the workbench by the camera to be tested to obtain a photo with a target;
analyzing the test picture, analyzing the picture with the target, measuring the distance between the center of the target and the center of the picture, and recording as an offset value A;
step six, distinguishing unqualified products, and judging the size relation between the deviation value A and a preset value B; if A is greater than B, the camera is a defective product; and if A is less than B, the camera is a qualified product.
Preferably, in the first step, the detection support comprises a top plate, a first side plate, a second side plate and a bottom plate.
Preferably, the fixing position is an installation hole dug in the top plate, the target faces the installation hole, a lens of a camera placed on the installation hole faces the target, the installation hole penetrates through the top plate, and a blocking platform is further arranged on the inner wall of the installation hole.
Preferably, in the second step, the center of the cross coincides with the center of the excircle.
Preferably, the inner wall of the mounting hole is provided with four blocking platforms, the four blocking platforms are respectively located at four right-angle positions of the mounting hole, the thickness of each blocking platform is smaller than that of the top plate, and the upper surfaces of the four blocking platforms are located on the same horizontal plane.
Preferably, the upper surface of the bottom plate is provided with a positioning pin, and the target plate is fixed on the upper surface of the bottom plate through the positioning pin.
Preferably, a plurality of mounting holes are formed in the detection support, and the number of the targets is equal to that of the mounting holes.
Preferably, only one and only one target is taken in the picture with the target.
Preferably, the step five and the step six can be performed by an external program to measure the deviation value and judge the ratio value.
Compared with the prior art, the invention has the beneficial effects that:
the camera detection method can quickly and accurately distinguish defective products in the camera. The camera is installed in the mounting hole, is shot to the target by the camera, judges the target photo of shooting through procedure or people's eye to according to the difference of target position and shooting photo central point, calculate this skew difference, if the skew difference is in error allowable range, then the yields, if the skew difference exceeds error allowable range, then the rejects.
The camera is installed in the mounting hole, specifically, the camera lens of camera is embedded into the mounting hole downwards, the casing part near the camera lens of camera keeps off the platform with four and contacts each other, the camera lens is kept flat in the mounting hole and is kept parallel with bottom plate upper surface, start the camera and carry out the photograph shooting of target area, then calculate the difference of target position and shooting photograph central point through computer program, calculate this skew difference, if the skew difference is in error allowance range, then be the yields, if the skew difference exceeds error allowance range, then be the defective products. In other embodiments, the evaluation may be performed by human eyes without a computer program, and whether the difference is within the allowable error range is determined manually according to the photos, so that the screening of the defective products can be realized to a certain extent.
Drawings
Fig. 1 is a flowchart of a camera detection method in embodiment 1 of the present invention.
Fig. 2 is a structural diagram of a detection bracket in embodiment 1 of the present invention.
Fig. 3 is a partially enlarged view of a detection stent in example 1 of the present invention.
Detailed Description
To facilitate understanding of those skilled in the art, the present invention will be described in further detail below with reference to specific embodiments and the accompanying drawings.
Referring to fig. 1 to 3, an embodiment 1 of the present invention includes:
a camera detection method comprises the following steps:
preparing a detection support, wherein the upper part of the support is a fixing position for fixing a camera to be detected, the lower part of the support is a workbench, and the camera to be detected fixed at the fixing position can shoot the workbench; the detection bracket 1 comprises a top plate 4, a first side plate 5, a second side plate 6 and a bottom plate 7; the fixed position is to dig mounting hole 2 of establishing in roof 4 department, and target 3 is towards mounting hole 2, and the camera lens of placing the camera on mounting hole 2 is towards target 3, and mounting hole 2 runs through roof 4, and 2 inner walls in mounting hole still are provided with and keep off platform 8.
Secondly, preparing a target plate, selecting a sheet-shaped object as the target plate, and drawing or pasting a target on the surface of the target plate, wherein the target has an outer circle and a cross-shaped intersection positioned inside the outer circle; the center of the cross coincides with the center of the excircle.
Placing a camera to be tested, fixing a target plate on a workbench, wherein the center of a target in the target plate and the central axis of the fixing position are positioned on the same straight line; four blocking platforms 8 are arranged on the inner wall of the mounting hole 2, the four blocking platforms 8 are respectively located at four right-angle positions of the mounting hole 2, the thickness of each blocking platform 8 is smaller than that of the top plate 4, and the upper surfaces of the four blocking platforms 8 are located on the same horizontal plane. The upper surface of the bottom plate 7 is provided with a positioning pin 9, and the target piece 10 is fixed on the upper surface of the bottom plate 7 through the positioning pin 9. The detection support 1 is provided with two mounting holes 2, the number of the targets 3 is equal to that of the mounting holes 2, and the number of the targets 3 is also two.
Step four, shooting a test photo, starting a camera to be tested, and shooting the workbench by the camera to be tested to obtain a photo with a target; there is one and only one target in the photographs taken with the targets.
Analyzing the test picture, analyzing the picture with the target, measuring the distance between the center of the target and the center of the picture, and recording as an offset value A;
step six, distinguishing unqualified products, and judging the size relation between the deviation value A and a preset value B; if A is greater than B, the camera is a defective product; and if A is less than B, the camera is a qualified product.
And step five and step six are used for measuring the deviation value and judging the ratio value through an external program.
The embodiment 2 of the present invention includes:
a camera detection method comprises the following steps:
preparing a detection support, wherein the upper part of the support is a fixing position for fixing a camera to be detected, the lower part of the support is a workbench, and the camera to be detected fixed at the fixing position can shoot the workbench; the detection support comprises a top plate, a first side plate, a second side plate and a bottom plate; the fixed position is a mounting hole dug in the top plate, the target faces the mounting hole, the lens of the camera placed on the mounting hole faces the target, the mounting hole penetrates through the top plate, and a blocking platform is further arranged on the inner wall of the mounting hole.
Secondly, preparing a target plate, selecting a sheet-shaped object as the target plate, and drawing or pasting a target on the surface of the target plate, wherein the target has an outer circle and a cross-shaped intersection positioned inside the outer circle; the center of the cross coincides with the center of the excircle.
Placing a camera to be tested, fixing a target plate on a workbench, wherein the center of a target in the target plate and the central axis of the fixing position are positioned on the same straight line; the mounting hole inner wall is provided with four and keeps off the platform, and four keep off the platform and are located four right angles departments of mounting hole respectively, keep off a thickness and be less than roof thickness, and four upper surfaces that keep off the platform are in same horizontal plane. The upper surface of the bottom plate is provided with a positioning pin, and the target plate is fixed on the upper surface of the bottom plate through the positioning pin. The detection support is provided with three mounting holes, the number of the targets is equal to that of the mounting holes, and the number of the targets is also three. In other embodiments, the number of mounting holes and targets may be greater.
Step four, shooting a test photo, starting a camera to be tested, and shooting the workbench by the camera to be tested to obtain a photo with a target; there is one and only one target in the photographs taken with the targets.
Analyzing the test picture, analyzing the picture with the target, measuring the distance between the center of the target and the center of the picture, and recording as an offset value A;
step six, distinguishing unqualified products, and judging the size relation between the deviation value A and a preset value B; if A is greater than B, the camera is a defective product; and if A is less than B, the camera is a qualified product.
And step five and step six, performing visual inspection of the deviation value and estimation of the ratio value through human eyes.
While the invention has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the spirit and scope of the appended claims.
Claims (9)
1. A camera detection method is characterized by comprising the following steps:
preparing a detection support, wherein the upper part of the support is a fixing position for fixing a camera to be detected, the lower part of the support is a workbench, and the camera to be detected fixed at the fixing position can shoot the workbench;
secondly, preparing a target plate, selecting a sheet-shaped object as the target plate, and drawing or pasting a target on the surface of the target plate, wherein the target has an outer circle and a cross-shaped intersection positioned inside the outer circle;
placing a camera to be tested, fixing the target plate on a workbench, wherein the center of a target in the target plate and the central axis of the fixing position are positioned on the same straight line;
step four, shooting a test photo, starting a camera to be tested, and shooting the workbench by the camera to be tested to obtain a photo with a target;
analyzing the test picture, analyzing the picture with the target, measuring the distance between the center of the target and the center of the picture, and recording as an offset value A;
step six, distinguishing unqualified products, and judging the size relation between the deviation value A and a preset value B; if A is greater than B, the camera is a defective product; and if A is less than B, the camera is a qualified product.
2. The camera detection method according to claim 1, wherein in the first step, the detection bracket (1) comprises a top plate (4), a first side plate (5), a second side plate (6) and a bottom plate (7).
3. The camera detection method according to claim 2, wherein the fixing position is a mounting hole (2) dug at a top plate (4), the target (3) faces the mounting hole (2), a lens of the camera placed on the mounting hole (2) faces the target (3), the mounting hole (2) penetrates through the top plate (4), and a blocking platform (8) is further arranged on an inner wall of the mounting hole (2).
4. The camera detection method according to claim 1, wherein in the second step, a center of the cross-shaped intersection coincides with a center of the outer circle.
5. The camera detection method according to claim 3, wherein four blocking platforms (8) are arranged on the inner wall of the mounting hole (2), the four blocking platforms (8) are respectively located at four right angles of the mounting hole (2), the thickness of each blocking platform (8) is smaller than that of the top plate (4), and the upper surfaces of the four blocking platforms (8) are located on the same horizontal plane.
6. The camera detection method according to claim 2, wherein a positioning pin (9) is arranged on the upper surface of the base plate (7), and the target plate (10) is fixed on the upper surface of the base plate (7) through the positioning pin (9).
7. The camera detection method according to claim 1, wherein a plurality of mounting holes (2) are provided on the detection bracket (1), and the number of targets (3) is equal to the number of mounting holes (2).
8. The camera detection method according to claim 1 or 7, wherein there is one and only one target in the picture taken with the target.
9. The camera detection method according to claim 1, wherein the fifth step and the sixth step are performed by an external program to measure the deviation value and determine the ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911134398.7A CN110907139A (en) | 2019-11-19 | 2019-11-19 | Camera detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911134398.7A CN110907139A (en) | 2019-11-19 | 2019-11-19 | Camera detection method |
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| Publication Number | Publication Date |
|---|---|
| CN110907139A true CN110907139A (en) | 2020-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911134398.7A Pending CN110907139A (en) | 2019-11-19 | 2019-11-19 | Camera detection method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018015A (en) * | 2012-12-26 | 2013-04-03 | 青岛歌尔声学科技有限公司 | Device and method for detecting optical-axis offset of lens in equipment |
| CN105376564A (en) * | 2015-11-24 | 2016-03-02 | 深圳创维－Rgb电子有限公司 | Camera calibration equipment and control method and device thereof |
-
2019
- 2019-11-19 CN CN201911134398.7A patent/CN110907139A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018015A (en) * | 2012-12-26 | 2013-04-03 | 青岛歌尔声学科技有限公司 | Device and method for detecting optical-axis offset of lens in equipment |
| CN105376564A (en) * | 2015-11-24 | 2016-03-02 | 深圳创维－Rgb电子有限公司 | Camera calibration equipment and control method and device thereof |
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Application publication date: 20200324 |
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