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Research And Implement On Strip Steel Surface Defects Inspection Algorithm Based On Vision System Of DSP

Posted on:2011-04-21Degree:MasterType:Thesis
Country:ChinaCandidate:C ZuoFull Text:PDF
GTID:2178360305970534Subject:Detection Technology and Automation
Abstract/Summary:PDF Full Text Request
With the rapid development of Chinese industry, strip steel products are widely used and the quality requirements are getting higher.Therefore, detection of strip steel surface quality is urgent to steel production.In strip steel production, strip steel surface defects have a great impact on strip steel products.Design an intelligentized device for strip steel surface defects detection is significantly important for test efficiency.In all strip steel surface defect detection technologies, the detection technology based on embedded machine vision is nondestructive, intelligent and easy to transplant, which is the trend of nondestructive detection.In the paper, the key processing algorithm for strip steel surface defect detection based on DSP machine vision is designed and proved.The main reserch area included:research of the algorithm for strip steel surface defect detection, comparison of de-noising strip steel images which are test in different ways.Test indicated median filtering can satisfy the de-noise requirement:Different algorithms for image segmentation are adopted in the part of defect segmentation,experiments indicate that iterated-threshold algorithm for strip steel's defect segmentation can segment strip steel image effectively and rapidly.To define defect area, we compare edges-following algorithm with pixel-signed algorithm and modified pixel-signed algorithm, test indicates that pixel-signed algorithm is better than others.For classification of strip steel defects, we designed a classifier based on BP algorithm which with high percentage of discrimination. Also, we designed a device based on DSP for algorithm for strip steel surface defect detection, and proved it by creating Code integer baesd on DSP system.The actual operation states that the device which applied on strip steel surface defects is efficiency.
Keywords/Search Tags:Strip steel surface defects, Machine vision, DSP, Image process
PDF Full Text Request
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