关键词: 边缘检测, 频谱包络滤波, 仿生学原理, 韦伯比曲线

Abstract: The traditional threshold of Canny operator is conducted a study to determine. Spectrum envelope is proposed for image smoothing filter. Through analyzing Weber’s law according to bionics principle, based on the background brightness the image is divided into different regions. The edge thresholds for the different areas are calculated according to the different equations. Experimental results show that the method can well protect the edge information of original image when the background noise is smoothing, and the edge thresholds can be adaptively selected according to the located backgrounds. Thus the image edge that is more consistent with human subjective vision can be detected. This method improves the automation of edge detection and is more practical.

Key words: edge detection, spectral envelope filter, bionics principle, Weber’s law