基于B样条小波的自适应阈值多尺度边缘检测

利用小波变换的特点,设计了3次B样条平滑滤波算子。对图像进行多尺度滤波,得到了不同尺度的小波变换。结合自适应阈值方法,在每种尺度下分别提取了图像边缘;而后利用边缘信息的多尺度特性,综合多尺度边缘得到单像素宽边缘。通过计算机仿真对该方法进行验证表明:该方法不仅能准确检测出图像边缘,而且能有效地抑制噪声,明显优于已有的边缘检测方法。

Adaptive Thresholds Multi-scale Edge Detection Based on B-Spline Wavelet

The cubic B-spline smoothing filter operator to perform multi-scale filtering was designed using the characteristics of wavelet transform. The obtained multi-scale wavelet transform was combined with adaptive thresholds to extract image edge at different scales. Through using multi-scale characteristic of the edge information and synthesizing the multi-scale edge, the image edge with only one pixel wide was obtained. Computer simuhion results show that this method is superior to the traditional edge detection methods with both precise image edge detection and effective noise restraining.