# -*- coding: utf-8 -*-"""图像梯度处理：Laplacian，Sobel算子"""import cv2import numpy as npfrom matplotlib import pyplot as pltimg = cv2.imread('../../datas/images/building.jpg',0)laplacian = cv2.Laplacian(img,cv2.CV_64F)sobelx = cv2.Sobel(img,cv2.CV_64F,1,0,ksize=5)sobely = cv2.Sobel(img,cv2.CV_64F,0,1,ksize=5)plt.subplot(2,2,1),plt.imshow(img,cmap = 'gray')plt.title('Original'), plt.xticks([]), plt.yticks([])plt.subplot(2,2,2),plt.imshow(laplacian,cmap = 'gray')plt.title('Laplacian'), plt.xticks([]), plt.yticks([])plt.subplot(2,2,3),plt.imshow(sobelx,cmap = 'gray')plt.title('Sobel X'), plt.xticks([]), plt.yticks([])plt.subplot(2,2,4),plt.imshow(sobely,cmap = 'gray')plt.title('Sobel Y'), plt.xticks([]), plt.yticks([])plt.show()