Depth error in 2D image with OpenCV Python

Question

I am trying to compute the Canny Edges in an image (ndarray) using OpenCV with Python.

slice1 = slices[15,:,:]
slice1 = slice1[40:80,60:100]
print slice1.sha         


        

Answer 1

Slice1 will need to be casted or created as a uint8. CV_8U is just an alias for the datatype uint8.

import numpy as np
slice1Copy = np.uint8(slice1)
slicecanny = cv2.Canny(slice1Copy,1,100)