A kind of dirty test method of wide-angle camera module

A technology of wide-angle camera and testing method, which is applied in the field of wide-angle camera module dirt testing, can solve the problems such as the difficulty of wide-angle camera dirty detection, and achieve the effect of preventing detection influence

Active Publication Date: 2022-01-18
横店集团东磁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly solves the problem of difficulty in detecting the dirt of the wide-angle camera in the prior art, and provides a method for testing the dirt of the wide-angle camera module

Method used

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  • A kind of dirty test method of wide-angle camera module

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Experimental program
Comparison scheme
Effect test

Embodiment

[0034] A kind of dirty test method of wide-angle camera module of this embodiment, such as figure 1 shown, including the following steps:

[0035] S1. The template is photographed with a camera; the template adopts 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. Extracting the black and white boundary position information, and forming the lens imaging boundary position information.

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

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

[0042] S32. Perform the first contrast enhancement process on the im...

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Abstract

The invention relates to a method for testing the contamination of a wide-angle camera module. The problem of difficult dirt detection of the wide-angle camera in the prior art is solved. The steps include shooting the template with a camera; distinguishing the normal part and the dark part of the captured image, and extracting the position information of the lens imaging boundary; performing median filtering and binarization processing on the captured image to obtain an image with dirty spots; Dirty points are found from images with dirty points within the range, and the dirty coordinates are calculated. The invention can effectively detect the dirt within the imaging range of the wide-angle lens module, and effectively prevents the dark part around the lens from being affected by the dirt detection.

Description

technical field [0001] The invention relates to a dirt detection technology, in particular to a dirt test method for a wide-angle camera module. Background technique [0002] Wide-angle cameras are widely used in security, unmanned aerial vehicles, surveillance and other fields, and the field of view of the camera reaches nearly 190°. Dirt inspection during module production testing is very different from conventional mobile phone camera modules. With a large wide-angle lens, the image distortion is serious, and the surrounding area is completely black or gray because it cannot receive light, which makes it more difficult to detect dirt. Contents of the invention [0003] The invention mainly solves the problem of difficulty in detecting the dirt of the wide-angle camera in the prior art, and provides a method for testing the dirt of the wide-angle camera module. [0004] The above-mentioned technical problems of the present invention are mainly solved by the following t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00G06T7/13G06T7/12G06T7/136G06T5/00G06T5/50H04N17/00
CPCH04N17/002G06T5/002G06T5/009G06T5/50G06T7/0002G06T7/12G06T7/13G06T7/136G06T2207/10004G06T2207/20032G06T2207/20224
Inventor 章平
Owner 横店集团东磁有限公司
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