关键词: 边缘检测, 梯度, 多阈值, 实时性

Abstract: To solve the problems such as short edge, edge loss and noise?sensitivity that exist in some traditional edge detection methods, a multi-threshold and real-time one based on Sobel gradient template is proposed in this paper. It collects pacesetters which are used for edge positioning under large threshold and determines search filed which is used for edge linking under small threshold. It extracts final edges with these edge clues and information collected under different thresholds by the thoughts of a connect-the-dots drawing game. Experimental results show that this method runs fast and has good real-time performance, and edges detected by it equip with single pixel width, position accuracy as well as good continuity.

Key words: edge detection, gradient, multi-threshold, real-time