Method and system for positioning mark center with weak contrast
A positioning mark and contrast technology, which is applied in image data processing, instrumentation, calculation, etc., can solve the problems of weak contrast positioning mark center, limitation and low precision, and achieves the effects of reliable results, good stability and fast speed.
Pending Publication Date: 2020-08-07
ZHAOQING ZHONGDAO OPTOELECTRONICS EQUIP CORP
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Abstract
The invention discloses a method and a system for positioning a mark center with weak contrast. The method comprises the following steps: performing edge extraction on a red component of an image to obtain an edge image, performing Gaussian filtering and binarization on the edge image to obtain a binarized image, performing dilation operation on the binarized image and removing noise to obtain a denoised image, and finally calculating a weak contrast positioning mark center. The method has the characteristics of high precision, high speed and good stability in a visual detection system. The precision of the method reaches the sub-pixel level, the result is reliable, and the method is widely applied to the visual inspection industry; and the method and system suitable for similar images with symmetry and weak contrast.
Application Domain
Image enhancementImage analysis
Technology Topic
Computer graphics (images)Pattern recognition +6
Image
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