DOC: don't divide by 255 when it's not required ;-)

doc/examples/plot_gabors_from_lena.py

@@ -53,7 +53,7 @@ np.random.seed(42)
 patch_shape = 8, 8
 n_filters = 49
 
-lena = color.rgb2gray(data.lena()) / 255.
+lena = color.rgb2gray(data.lena())
 
 # -- filterbank1 on original Lena
 patches1 = view_as_windows(lena, patch_shape)

doc/examples/plot_view_as_blocks.py

@@ -24,7 +24,7 @@ from skimage.util.shape import view_as_blocks
 
 
 # -- get `lena` from skimage.data in grayscale
-l = color.rgb2gray(data.lena()) / 255.
+l = color.rgb2gray(data.lena())
 
 # -- size of blocks
 block_shape = (4, 4)