Added horse.png to skimage/data and added a horse() in the _init_.py in data subpackage

doc/examples/applications/plot_morphology.py

@@ -214,7 +214,7 @@ on binary images only.
 """
 
 from skimage import img_as_bool
-horse = ~img_as_bool(io.imread(data_dir+'/horse.jpeg', as_grey=True))
+horse = ~img_as_bool(io.imread(data_dir+'/horse.png', as_grey=True))
 
 sk = skeletonize(horse)
 plot_comparison(horse, sk, 'skeletonize')

skimage/data/__init__.py

@@ -116,6 +116,19 @@ def page():
     return load("page.png")
 
 
+def horse():
+    """Image of a horse.
+
+    This image was downloaded from
+    `openclipart <http://openclipart.org/detail/158377/horse-by-marauder>`
+
+    Released into public domain and drawn by Andreas Preuss and uploaded by
+    marauder.
+
+    """
+    return load("horse.png")
+
+
 def clock():
     """Motion blurred clock.