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Defect Detection on Imaging Surfaces by Using Multi-Scale Image Analysis

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The proposed method for automatic defect detection is based on a time-effective algorithm of multi-scale and structure-adaptive analysis of pictures obtained from imaging surfaces. Application of the concept of image multi-scale relevance function in the framework of visual attention mechanism provides a quick and reliable location of regions of attention with potential defect indications considered as objects of interest on images. The relevance function is a local image operator that has local maxima at centers of the objects of interest or their regular parts, which are termed primitive patterns. A detailed structure-adaptive image analysis is performed within the regions of attention in order to make the final decision on defect presence in a current focus-of-attention point. The method requires a simple parameter learning procedure applied to sample images of imaging surfaces prior the automatic inspection. The testing results indicate on the superiority of the relevance function approach to location of defect indications in images over the known computer vision methods for defect detection.
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Document Type: Research Article

Publication date: 01 January 2000

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  • For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.

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