img = np.zeros((112,112,3))#cv2.imread('F:/project/Breast/InBreast/INBreast/outimgpatch/allnocalcification/20586908_1.png') for i in range(112): for j in range(112): for k in range(3): img[i,j,k] = 0 plt.imshow(img) plt.show() cv2.imwrite(tarDir + '1.png',img)