not0loc = np.where(img!=0)
for idex in range(len(not0loc[0])):
locy = not0loc[0][idex]
locx = not0loc[1][idex]
img[locy, locx] = 255
not0loc = np.where(img!=0)
for idex in range(len(not0loc[0])):
locy = not0loc[0][idex]
locx = not0loc[1][idex]
img[locy, locx] = 255