python opencv3图像膨胀和腐蚀

#encoding=utf-8
import cv2
import numpy as np
img = cv2.imread("E:/1.jpg", -1)
#cv2.namedWindow('img')
cv2.imshow('img', img)
cv2.waitKey(0)
kernel = cv2.getStructuringElement(cv2.MORPH_RECT,(3, 3)) 
eroded = cv2.erode(img,kernel)
dilated = cv2.dilate(img,kernel)
cv2.imwrite("E:/11.jpg",eroded)
cv2.imwrite("E:/22.jpg",dilated)
cv2.destroyAllWindows();#encoding=utf-8
import cv2
import numpy a