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박상봉,심영석 경북대학교 전자기술연구소 1988 電子技術硏究誌 Vol.9 No.1
A sequential edge detector has been studied, and some efforts are made to improve the basic scheme. In our method, a contour start point is chosen as a pixel which has a locally maximum gradient to provide good edge location. We use both the edge strength and direction information in tracing the contour. Edge seat determination procedure is desired to enhance the connectivity between edge segments. An adaptive counter start and edge continuity threshold are devised and tested experimentally. The method provides relatively simple edge in highly active region and is capable to detect the weak edges in low constrast region.