TypeError Expected Ptr cv UMat for argument s

Question

Hey I got 

'' TypeError: Expected Ptr<cv::UMat> for argument '%s' '' such kind of error during writing image. what should I do??

Answer 1

src is the first argument to cv2.cvtColor.

The error you are getting is because it is not the right form. cv2.Umat() is functionally equivalent to np.float32(), so your last line of code should read:

gray = cv2.cvtColor(np.float32(imgUMat), cv2.COLOR_RGB2GRAY)