基于Contourlet变换和Susan算子的边缘检测方法  

Image Edge Detection Based on Contourlet Transform and Susan Operator

作　　者：李杰[1] 向静波[1] 

机构地区：[1]中国空空导弹研究院,河南洛阳471009

出　　处：《现代电子技术》2010年第16期137-139,共3页Modern Electronics Technique

基　　金：航空科学基金资助项目(20090112004)

摘　　要：现存的基于空间域的图像边缘检测算法只能有效检测出图像有限方向的边缘。针对这一问题,根据Contourlet变换子带的各方向子带代表的方向信息及其梯度方向,提出了一种基于Contourlet变换和Susan算子的边缘检测算法。边缘检测算法首先对源图像进行Contourlet变换,然后分别对高、低频子图像进行边缘提取,最后通过一定的融合规则进行融合,得到边缘图。实验结果表明,这种边缘检测方法具有有效地抑制噪声、边缘检测精度高等特点,是一种有效的图像边缘提取算法。The available image edge detection algorithm based on the spatial-domain can capture only limited directional edge in image.An improved algorithm for the image edge detection based on the directions of each directional sub-band and its gradient is proposed to overcome the disadvantages.By the algorithm,firstly,multi-scale decomposition of the image is performed with Contourlet transform.Then the edge detection of low-frequency sub-image and high-frequency sub-image are obtained.Finally,this edge diction method combines the advantages of both methods together to fuse the two edge information obtained by different methods according to certain rule.Experimental results show that the new edge detection method is effective to suppression of noise,and has advantages of high precision image edge detection.

关 键 词：边缘检测 CONTOURLET变换 SUSAN算子 空间域 

分 类 号：TN911-34[电子电信—通信与信息系统] TP391[电子电信—信息与通信工程]