说明：  MATLAB的图像处理基础的资料\4 程序代码说明 P0401：用Prewitt算子检测图像的边缘 P0402：用不同σ值的LoG算子检测图像的边缘 P0403：用Canny算子检测图像的边缘 P0404：图像的阈值分割 P0405：用水线阈值法分割图像 P0406：对矩阵进行四叉树分解 P0407：将图像分为文字和非文字的两个类别 P0408：形态学梯度检测二值图像的边缘 P0409：形态学实例——从PCB图像中删除所有电流线，仅保留芯片对象
(Image processing based on MATLAB \ 4 code Description P0401: Prewitt operator to detect the edges of the image P0402: different value of σ of LoG operator detect the image edge P0403: Canny operator detect the image edge P0404: image threshold segmentation P0405: water line threshold method image segmentation P0406: matrix Quadtree P0407: images into text and non-text two categories P0408: morphological gradient detection Binary Image Edge P0409: morphology example-- Images from the PCB to remove all current lines, retaining only chip targets)