System and method for testing camera module stains

Abstract

The invention provides a system for testing camera module stains. The system comprises a camera module and a signal processor connected with the camera module. The signal processor comprises a region division module, a brightness reading module and a calculation determination module. The region division module is used for dividing a picture acquired by the camera module into a plurality of test regions, the brightness reading module is used for reading brightness values of test points of the plurality of the test regions in the picture, the calculation determination module presets a critical contrast ratio for calculating contrast ratios between the test points and peripheral brightness, and the test points are stains if the contrast ratios are smaller than or equal to the preset critical contrast ratio. The invention further provides a method for testing camera module stains. According to the system and the method for testing camera module stains, the pictures acquired by the camera module is subjected to region division by the region division module, and the calculation determination module compares the brightness of the test points of the regions with the peripheral brightness of the test points and determines whether the contrast ratios are smaller than or equal to the preset critical contrast ratio, so that the determination is accurate, and the efficiency is high.

Description

technical field [0001] The invention relates to a camera module test system, in particular to a camera module stain test system and a test method thereof. Background technique [0002] At present, more and more electronic products include camera units capable of taking pictures and videos, such as mobile phones and tablet computers. There is at least one camera module in each camera unit that can take pictures and record videos. Each camera module is composed of main components such as sensors and lenses. During the assembly process, tiny particles may fall into it. If there are tiny particles in the imaging area, a stained area with uneven color and fog will be generated on the imaging. The existing detection method is to judge by human eyes. However, each person's visual sense is different, and the standard They are also not the same, therefore, misjudgments or missed judgments are prone to occur, and the detection efficiency is relatively low. Contents of the invention...

AI Technical Summary

Problems solved by technology

There is at least one camera module in each camera unit that can take pictures and record videos. Each camera module is composed of main components such as sensors and lenses. During the assembly process, tiny particles may fall into it. If there are tiny particles in the imaging area, a stained area with uneven color and fog will be generated on the imaging. The existing detection method is to judge by human eyes. However, each person's visual sense is different, and the standard Therefore, misjudgments or missed judgments are prone to occur, and the detection efficiency is relatively low

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