说明：  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
(Procedure Code Description P0401: detection with Prewitt operator image edge P0402: LoG with different σ values of the image edge detection operator P0403: image with Canny edge detection operator P0404: Image segmentation P0405: water line threshold Segmentation of images P0406: on the matrix quadtree decomposition P0407: text and image is divided into two categories of non-text P0408: binary image morphological gradient edge detection P0409: morphology instance- to delete all images from the PCB current lines, retaining only the object chip)