基于旋转式扫描及非正交小波变换的边沿提取

经典的边沿提取方法对图像复杂且对比度弱的图像难以处理。提出一种由粗（旋转式扫描法）到细（特殊设计的四系数非正交小波边沿检测滤波器）、适用于复杂图像中呈辐射状分布、线状物体边沿的提取方法。实验表明，较之经典方法，文中方法具有边沿位置定位精度高、非线状物体的边沿提取特少、边沿连续性好及抗干扰能力强的优点。

A Novel Edge Detection Method Using Rotary Scanning and Non-Orthogonal Wavelet Transform

Accurate edge detection in low contrastand com plicated im ages rem ains a difficult task for classical m ethods available. A coarse(rotary scanning m ethod) to fine(a non orthogonal four coefficient w avelet edge detector)m ethod foredge detection ofradially distributed linearobjects ispresented in thispaper. Experim entresults show thattrue edge locationsofthe linearobjectscan befastdetected by the proposed m ethod w ith continuous struc tures ofobjects, less nonlinear segm ents leftand insensitivity to noise.