Zernike矩结合Sobel算子的边缘检测

提出了一种亚像素级的噪声图像边缘检测算法。首先使用基于各向异性扩散的非线性正则化Perona-Malik模型,实现对图像的平滑滤波;然后用改进的Sobel算子对图像进行初步边缘检测,将检测到的包括真正的和少数伪边缘点的坐标生成链表记录下来,原灰度图像保留;最后利用Zernike矩进行亚像素级的边缘精确定位。实验结果表明,此算法解决了传统算法中伪边缘点过多和边缘检测结果较宽的问题,图像的质量接近于定位准确度为亚像素级的小波算法。

Edge detection based on Zernike moments and Sobel operator

A sub-pixel level algorithm in edge detection of noisy image was proposed.Firstly,the nonlinear regularized Perona-Malik model based on anisotropy diffusion was adopted to realize smooth filtering on the image.Then the improved Sobel operator was used to perform preliminary edge detection on the image and record the coordinates of the real and a few false edge points in the form of linked list with the original gray image being retained.Finally,the proposed Zernike moments were employed to locate the sub-pi...