Nice Overlay of Binary Mask on Raw Image

### Nice Overlay of Binary Mask on Raw Image

# Init
plt.figure(figsize=(10,10))

# Background: the raw image
plt.imshow(img, interpolation='none', cmap='gray') 

# Foreground: the binary membrane mask
# Note: `np.ma.array` ensures that the background regions are masked away
#       and `alpha` makes the image semi-transparent.
plt.imshow(np.ma.array(mem_final, mask=~mem_final), 
                       interpolation='none', cmap='autumn', alpha=0.4)

# Done
plt.show()