diff --git a/doc/examples/features_detection/plot_gabors_from_astronaut.py b/doc/examples/features_detection/plot_gabors_from_astronaut.py
index 7f718014..a8cb50c2 100644
--- a/doc/examples/features_detection/plot_gabors_from_astronaut.py
+++ b/doc/examples/features_detection/plot_gabors_from_astronaut.py
@@ -51,7 +51,7 @@ np.random.seed(42)
 patch_shape = 8, 8
 n_filters = 49
 
-astro = np.ascontiguousarray(color.rgb2gray(data.astronaut()))
+astro = color.rgb2gray(data.astronaut())
 
 # -- filterbank1 on original image
 patches1 = view_as_windows(astro, patch_shape)
diff --git a/doc/examples/numpy_operations/plot_view_as_blocks.py b/doc/examples/numpy_operations/plot_view_as_blocks.py
index 862d8e32..53797aac 100644
--- a/doc/examples/numpy_operations/plot_view_as_blocks.py
+++ b/doc/examples/numpy_operations/plot_view_as_blocks.py
@@ -25,7 +25,7 @@ from skimage.util.shape import view_as_blocks
 
 
 # -- get `astronaut` from skimage.data in grayscale
-l = np.ascontiguousarray(color.rgb2gray(data.astronaut()))
+l = color.rgb2gray(data.astronaut())
 
 # -- size of blocks
 block_shape = (4, 4)