Python openCV 画像の勾配

画像の勾配を動かしてみた。

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import cv2 import numpy as np from matplotlib import pyplot as plt   img = cv2.imread('pic.png',0)   laplacian = cv2.Laplacian(img,cv2.CV_64F) #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()

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import cv2 import numpy as np import matplotlib.pyplot as plt   img = cv2.imread('pic2.png')   sobelx8u=cv2.Sobel(img,cv2.CV_8U,1,0,ksize=5)   sobelx64f=cv2.Sobel(img,cv2.CV_64F,1,0,ksize=5) abs_sobel64f=np.absolute(sobelx64f) sobel_8u = np.uint8(abs_sobel64f)   plt.subplot(1,3,1),plt.imshow(img,cmap = 'gray') plt.title('Original'), plt.xticks([]), plt.yticks([]) plt.subplot(1,3,2),plt.imshow(sobelx8u,cmap = 'gray') plt.title('Sobel CV_8U'), plt.xticks([]), plt.yticks([]) plt.subplot(1,3,3),plt.imshow(sobel_8u,cmap = 'gray') plt.title('Sobel abs(CV_64F)'), plt.xticks([]), plt.yticks([])   plt.show()