图像形态学

腐蚀操作

 1 import cv2
 2 import numpy as np
 3 
 4 img = cv2.imread('default.png')
 5 cv2.imshow('test', img)
 6 kernel = np.ones((3, 5), np.uint8)
 7 # 腐蚀能将边缘的小刺剔除掉
 8 erosion = cv2.erode(img, kernel, iterations=1)
 9 cv2.imshow('corrosion', erosion)
10 cv2.waitKey(0)
11 cv2.destroyAllWindows()
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膨胀操作

 1 import cv2
 2 import numpy as np
 3 
 4 img = cv2.imread('default.png')
 5 kernel = np.ones((3, 3), np.uint8)
 6 dilate = cv2.dilate(img, kernel, iterations=1)
 7 cv2.imshow('Original', img)
 8 cv2.imshow('dilate', dilate)
 9 cv2.waitKey(0)
10 cv2.destroyAllWindows()
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开运算

 1 import cv2
 2 import numpy as np
 3 
 4 img = cv2.imread('default.png')
 5 cv2.imshow('Original', img)
 6 kernel = np.ones((5, 5), np.uint8)
 7 # 先腐蚀再膨胀，能将主体被腐蚀的部分补偿回去，但是边缘的毛刺很好的被清除掉
 8 opening = cv2.morphologyEx(img, cv2.MORPH_OPEN, kernel)
 9 cv2.imshow('opening', opening)
10 cv2.waitKey(0)
11 cv2.destroyAllWindows()
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闭运算

 1 import cv2
 2 import numpy as np
 3 
 4 img = cv2.imread('default.png')
 5 cv2.imshow('Original', img)
 6 kernel = np.ones((5, 5), np.uint8)
 7 # 先膨胀，再腐蚀，对边缘的毛刺没有什么清除效果，有点鸡肋
 8 closing = cv2.morphologyEx(img, cv2.MORPH_CLOSE, kernel)
 9 cv2.imshow('closing', closing)
10 cv2.waitKey(0)
11 cv2.destroyAllWindows()
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梯度运算

 1 import cv2
 2 import numpy as np
 3 
 4 img = cv2.imread('default.png')
 5 cv2.imshow('Original', img)
 6 kernel = np.ones((5, 5), np.uint8)
 7 # 梯度=膨胀-腐蚀，可用来计算图像边缘
 8 gradient = cv2.morphologyEx(img, cv2.MORPH_GRADIENT, kernel)
 9 cv2.imshow('gradient', gradient)
10 cv2.waitKey(0)
11 cv2.destroyAllWindows()
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礼帽

 1 import cv2
 2 import numpy as np
 3 
 4 img = cv2.imread('default.png')
 5 cv2.imshow('Original', img)
 6 kernel = np.ones((5, 5), np.uint8)
 7 # 礼帽=原始输入-开运算结果
 8 tophat = cv2.morphologyEx(img, cv2.MORPH_TOPHAT, kernel)
 9 cv2.imshow('tophat', tophat)
10 cv2.waitKey(0)
11 cv2.destroyAllWindows()
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黑帽

 1 import cv2
 2 import numpy as np
 3 
 4 img = cv2.imread('default.png')
 5 cv2.imshow('Original', img)
 6 kernel = np.ones((5, 5), np.uint8)
 7 # 黑帽=闭运算-原始输入
 8 blackhat = cv2.morphologyEx(img, cv2.MORPH_BLACKHAT, kernel)
 9 cv2.imshow('blackhat', blackhat)
10 cv2.waitKey(0)
11 cv2.destroyAllWindows()
View Code

 

posted @ 2021-09-13 16:40  Ocean允许访问  阅读(42)  评论(0)    收藏  举报