Wide-angle camera module smudginess test method

A technology of a wide-angle camera and a testing method, which is applied in the field of contamination testing of wide-angle camera modules, can solve problems such as difficulty in detecting contamination of wide-angle cameras, and achieve the effect of preventing the influence of detection.

A technology of a wide-angle camera and a testing method, which is applied in the field of contamination testing of wide-angle camera modules, can solve problems such as difficulty in detecting contamination of wide-angle cameras, and achieve the effect of preventing the influence of detection.

CN108288264AActive Publication Date: 2018-07-17横店集团东磁有限公司
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  • Wide-angle camera module smudginess test method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0034] In this embodiment, a method for testing the contamination of a wide-angle camera module, such as figure 1 As shown, including the following steps:

[0035] S1. Use a camera to shoot the template; the template uses a white background.

[0036] S2. Distinguish the normal part and the dark part of the captured image, and extract the position information of the lens imaging boundary; the specific steps include:

[0037] S21. Set the threshold of the captured image; the threshold is 60~70.

[0038] S22. Binarize the captured image according to the threshold;

[0039] S23. Extract the boundary position information of black and white as the boundary position information of the lens imaging.

[0040] S3. Perform median filtering and binarization processing on the captured image to obtain an image with stains; the specific process includes:

[0041] S31. Read the captured image in grayscale format;

[0042] S32. Perform the first contrast enhancement processing on the image; the contrast i...

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Abstract

The invention relates to a wide-angle camera module smudginess test method, and aims at solving the problem that the wide-angle camera module smudginess test is difficult in the prior art. The methodcomprises the following steps of: shooting a template by using a camera; distinguishing a normal part and a dark part of a shot image, and extracting lens imaging boundary position information; carrying out median filtration and binarization on the shot image to obtain an image with smudginess points; and finding the smudginess points from the image with the smudginess points in a lens imaging boundary range so as to calculate a smudginess coordinate. According to the method, smudginess in imaging ranges of wide-angle camera modules can be effectively detected, so that detection influences, onsmudginess, of relatively dark parts around the lenses can be effectively prevented.

Description

Technical field [0001] The invention relates to a dirt detection technology, in particular to a dirt testing method of a wide-angle camera module. Background technique [0002] Wide-angle cameras are widely used in security, drones, surveillance and other fields, and the camera's field of view angle reaches nearly 190° or more. The dirt inspection during the module production test is very different from the conventional mobile phone camera module. With a large wide-angle lens, the image is severely distorted, and the surrounding area is completely black or gray due to the inability to receive light. This makes the detection of dirt more difficult. Summary of the invention [0003] The present invention mainly solves the problem of difficulty in detecting the dirt of a wide-angle camera in the prior art, and provides a dirt test method for a wide-angle camera module. [0004] The above-mentioned technical problems of the present invention are mainly solved by the following technica...

Claims

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Application Information

Patent Timeline
17 Jul 2018
Publication
CN108288264A
IPC
G06T7/00; G06T7/13; G06T7/12; G06T7/136; G06T5/00; G06T5/50; H04N17/00
CPC
H04N17/002; G06T5/50; G06T7/0002; G06T7/12; G06T7/13; G06T7/136; G06T2207/10004; G06T2207/20032
Inventors
章平