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A method for detecting the uniformity of light panel illumination

A technology with uniform illumination and detection methods, which is applied in the field of visual inspection technology improvement, can solve the problems of inability to realize automatic batch detection, complicated operation, low efficiency, etc., and achieve the effect of realizing batch automatic testing, simple measurement process and improving work efficiency

Active Publication Date: 2020-09-11
SHENZHEN COLIBRI TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for detecting the uniformity of illumination of lamp panels, aiming to solve the technical problems of complex operation, low efficiency and inability to realize automatic batch detection in the current manual detection of illumination uniformity of lamp panels

Method used

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  • A method for detecting the uniformity of light panel illumination

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Embodiment Construction

[0029] Such as figure 1 As shown, the flow chart of the lamp panel illumination uniformity detection method provided by the present invention is described in detail as follows:

[0030] Step S1, obtain the image of the lamp board to be detected and convert it into a single-channel image; in this process, prepare the lamp board to be detected, use the camera equipment to extract the image of the The detected lamp panel image is converted into a single-channel image. During the conversion process, R / G / B channel fusion can be selected: Gray=(R*30+G*59+B*11) / 100, R channel: Gray= R, G channel: Gray=G, B channel: any one of Gray=B is acceptable.

[0031] Step S2, according to the given brightness classification, the converted point-channel image is converted into a brightness equipotential map; the converted single-channel image is graded according to the given brightness, and during the classification process, the graded single-channel image The decomposed adjacent points in are...

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Abstract

The invention is applied to the technological improvement field of visual detection, and provides a method for detecting illumination uniformity of a lamp panel. The method comprises the steps of S1 acquiring a to-be-detected lamp panel image and converting the to-be-detected lamp panel image into a single channel image, S2 generating the converted point channel image into a luminance potentiometric map according to a given luminance classification, S3 detecting a luminance center of the potentiometric map according to a set threshold, S4 detecting the overlap ratio of the image centroid and the center of the luminance potentiometric map, S5 detecting the normality of the luminance center, and S6 analyzing the area luminance to judge whether the illumination uniformity of the lamp panel meets the requirement or not. The measurement process is simple; the working efficiency is improved; and the batch automatic testing is realized.

Description

technical field [0001] The invention belongs to the field of visual inspection technology improvement, and in particular relates to a method for detecting uniformity of illumination of a lamp panel. Background technique [0002] In machine vision applications, the light board is often used as a backlight for size detection, foreign object detection, liquid level detection, and shape detection because it can fully highlight the outline information of the measured object. Whether the illumination of the lamp panel is uniform has a great influence on the imaging display effect of the image acquisition system, and thus becomes a concern of various manufacturers. [0003] At present, the illumination uniformity detection of light panels is mainly carried out manually, using a luminance measuring instrument to measure the luminance values ​​of different points, and observing whether the luminance measurement values ​​of each point are consistent. The measurement process is relativ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/02
CPCG01M11/00
Inventor 陈龙廖晓苏张涛陈克凡
Owner SHENZHEN COLIBRI TECH
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