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A Self-Adaptive Edge Detection Approach by Improved Isotropic Sobel and OTSU

This paper presents a self-adaptive approach to detect the edge of target in a digital image, and the proposed approach is based on eight-direction Isotropic Sobel and OTSU. Simulation experiments in matlab show that the approach can set the threshold value of an image automatically, has high precision in image detection, good connectivity, the uniform image edge magnitude for all directions and suppresses the noise well.