关键词: 方向形态滤波算子, 边缘跟踪, 非线性滤波器

Abstract: The morphological filter with omni-directional structuring elements is a typical nonlinear filter，which has a good performance for selecting direction edge information and removing the noise.It is widely used in image denoising and edge extraction.Based on general open maximum and general close minimum morphological filter，a new fast edge tracking algorithm is proposed.The key problems of algorithm are solved，by encoding edge pixel with edge direction information，calculating the minimum direction of the edge pixel tracking，and determining non-continuous point of the edge.In order to verify the effectiveness and feasibility of the algorithm，some contrast experiments with different algorithms are completed about the standard circle and the noised Lena image.Experimental results show that the new fast tracking algorithm has good features for anti-noise and single-pixel connectivity.

Key words: directional morphological filtering operator, edge tracking, nonlinear filter