opencv 形态学变换(开运算，闭运算，梯度运算)

import cv2
import numpy as np
o=cv2.imread("opening.bmp",cv2.IMREAD_UNCHANGED)
k=np.ones((10,10),np.uint8)
r=cv2.morphologyEx(o,cv2.MORPH_OPEN,k)
cv2.imshow("original",o)
cv2.imshow("result",r)
cv2.waitKey()
cv2.destroyAllWindows()

import cv2
import numpy as np
o=cv2.imread("closing.bmp",cv2.IMREAD_UNCHANGED)
k=np.ones((10,10),np.uint8)
r=cv2.morphologyEx(o,cv2.MORPH_CLOSE,k)
cv2.imshow("original",o)
cv2.imshow("result",r)
cv2.waitKey()
cv2.destroyAllWindows()

import cv2
import numpy as np
o=cv2.imread("gradient.bmp",cv2.IMREAD_UNCHANGED)
k=np.ones((5,5),np.uint8)
r=cv2.morphologyEx(o,cv2.MORPH_GRADIENT,k)
cv2.imshow("original",o)
cv2.imshow("result",r)
cv2.waitKey()
cv2.destroyAllWindows()