message: bad image file
diff: @@ -77,7 +77,7 @@ bitwise operations as below:
  @code{.py}
  # Load two images
  img1 = cv.imread('messi5.jpg')
  -img2 = cv.imread('opencv-logo.png')
  +img2 = cv.imread('opencv-logo-white.png')
  # I want to put logo on top-left corner, So I create a ROI
  rows,cols,channels = img2.shape
  