OpenCV error - cv2.cvtcolor

Question

I am a newbie to openCV and I am stuck at this error with no resolution. I am trying to convert an image from BGR to grayscale format using this code-

img = cv2.         


        

Answer 1

The error occured because the datatype of numpy array returned by cv2.imread is uint8, which is different from the datatype of numpy array returned by np.full(). To make the data-type as uint8, add the dtype parameter-

img = np.full((100,80,3), 12, dtype = np.uint8)
gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)