Environment self-adaptive product defect detection method based on whiteboard illumination compensation

A technology for illumination compensation and product defects, which is used in the processing of 3D images, image data processing, instruments, etc.

Pending Publication Date: 2021-07-23
北京平恒智能科技有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The technical problem solved by the present invention is: by optimizing the measurement method and software processing process, eliminating the adverse effects of uneven illumination introduced by hardware design limitations on image analysis

Method used

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  • Environment self-adaptive product defect detection method based on whiteboard illumination compensation
  • Environment self-adaptive product defect detection method based on whiteboard illumination compensation

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Embodiment Construction

[0022] The implementation process and working principle of the algorithm are described through the following examples. Considering the different application scenarios of the algorithm, in order to improve the final image processing effect, various evolutionary implementation methods can be adopted in each link. This embodiment only shows an implementation process, which is used to illustrate the simplified steps of the method.

[0023] The first step is to collect the light distribution data of the lighting source. The most general implementation method is to place a piece of clean white paper in the blank viewing space, and the white paper occupies the viewing space. Trigger the camera to take pictures when the light source is stable.

[0024] In the second step, replace the white paper in the first step with the sample material to be tested, and the collection method is consistent with the above steps. This embodiment is a simplified version of the implementation process, ...

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Abstract

The invention relates to an environment self-adaptive product defect detection method based on a whiteboard illumination compensation algorithm. According to the method, the adverse effect of non-uniform illumination introduced by hardware design limitation on image analysis is eliminated by optimizing a data collection method and a software processing process; the method is non-uniform illumination image enhancement method suitable for rapid detection equipment, and influence caused by non-uniform illumination can be essentially eliminated from a data acquisition end; a difference between a template and a sample picture possibly caused by a non-uniform illumination condition is analyzed, and the difference introduced by non-uniform illumination is eliminated through a method of dynamically generating a template image; and the processed picture is uniform in illumination, the sample edge and defect information is not lost, and the stability and reliability of a subsequent defect detection algorithm can be improved.

Description

technical field [0001] The invention relates to the intersecting fields of industrial detection and digital image processing, in particular to an image processing and analysis process suitable for real-time detection equipment for sample defects. Background technique [0002] With the rapid development of machine vision inspection application technology and digital image processing technology, more and more industrial assembly lines use machine inspection to ensure and improve the factory quality of products. It is an industry trend to use machine equipment instead of manual inspection, and it is difficult to efficiently complete the workpiece size measurement and small defect product screening that require high precision. Automated industrial product quality control equipment and rapid defect detection equipment have increasingly become sharp tools for industrial product quality assurance. [0003] The image-based detection method is one of the main technical means to achi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/13G06T5/00G06T15/50
CPCG06T7/0004G06T7/13G06T5/007G06T15/506G06T2207/10052G06T2207/30164G06T2207/30168
Inventor 不公告发明人
Owner 北京平恒智能科技有限公司
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