numpy 3D-image array to 2D

Question

I have a 3D-numpy array of a gray image, which looks something like this:

[[[120,120,120],[67,67,67]]...]

Obviously I have eve

Answer 1

If the shape of your ndarray is (M, N, 3), then you can get an (M, N) gray-scale image like this:

>>> gray = img[:,:,0]