Image edge stain detection method and system

Abstract

The invention relates to the technical field of image processing and provides an image edge stain detection method and system. The method comprises the following steps: analyzing an image and detecting the edge line of the image; determining a edge stain detection region based on the edge line of the image; traversing the edge stain detection region through a stain detection standard block and preliminarily judging stains; if the grey value of a pixel block is lower than the grey threshold value of each stain, calculating the distance between the edge of the pixel block and the edge line of the image; judging whether the distance between the edge of the pixel block and the edge line of the image is smaller than the threshold value of a stain judgment distance or not; judging whether the pixel block is a stain block or not; if the grey value of the pixel block is greater than the grey threshold value of the stain, continuously performing the step of traversing the edge stain detection region through a preset stain detection standard block to realize detection of the image stains. According to the method, the detection process is directly applied to detection of a production line, the detection efficiency and quality are relatively high, and the product defect rate is reduced.

Description

technical field [0001] The invention belongs to the technical field of image processing, in particular to an image edge stain detection method and system. Background technique [0002] The industrial camera is a key component in the machine vision system. Its most essential function is to convert optical signals into orderly electrical signals. Choosing the right camera is also an important part of the design of the machine vision system. The choice of camera not only directly determines the The captured image resolution, image quality, etc. are also directly related to the operating mode of the entire system. [0003] For the miniaturization and high resolution of visualized electronic products, for the detection of stains on the screen of electronic products in a miniature and high resolution state, not only high-resolution industrial cameras are required, but more importantly, high-quality algorithms are required for the images captured by the cameras Analysis, due to th...

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Problems solved by technology

[0005] The object of the present invention is to provide a method for detecting stains on the edge of an image, aiming to solve many problems in the prior art in the analysis method for stains on images taken by industrial cameras, such as the low efficiency and low accuracy of stain detection, resulting in product The problem of increasing bad rate

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