how to copy numpy array value into higher dimensions

Question

I have a (w,h) np array in 2d. I want to make a 3d dimension that has a value greater than 1 and copy its value over along the 3rd dimensions. I was hoping broadcast would d

Answer 1

Better helpful in converting gray a-channel matrix into 3 channel matrix.

img3 = np.zeros((gray.shape[0],gray.shape[1],3))
img3[:,:,0] = gray
img3[:,:,1] = gray
img3[:,:,2] = gray
fig = plt.figure(figsize = (15,15))
plt.imshow(img3)