Thanks a lot for your replies. The code that works for me looks as follows:

import skimage.io as io

from skimage.color import rgb2gray

img = io.imread('baboon.png')

img_grayscale = rgb2gray(img)

show_grayscale = io.imshow(img_grayscale)

io.show()

On Thursday, January 21, 2016 at 12:46:10 PM UTC+1, Abder-Rahman Ali wrote:

I'm trying to convert a color image to a grayscale image, as follows:
from skimage import io
from skimage.color import rgb2gray 
img = io.imread('baboon.png')
img_grayscale = rgb2gray(img)
io.imshow(img_grayscale)
The code works fine, but the image does not get displayed, why is that?

Thanks.