Merge pull request #538 from ahojnnes/examples-travis

TST: Let Travis run all examples.

skimage/color/tests/test_colorconv.py

@@ -126,7 +126,7 @@ class TestColorconv(TestCase):
 
     # RGB<->HED roundtrip with ubyte image
     def test_hed_rgb_roundtrip(self):
-        img_rgb = self.img_rgb
+        img_rgb = img_as_ubyte(self.img_rgb)
         assert_equal(img_as_ubyte(hed2rgb(rgb2hed(img_rgb))), img_rgb)
 
     # RGB<->HED roundtrip with float image

skimage/data/__init__.py

@@ -169,7 +169,7 @@ def immunohistochemistry():
     No known copyright restrictions.
 
     """
-    return load("ihc.jpg")
+    return load("ihc.png")
 
 
 def chelsea():
@@ -183,4 +183,4 @@ def chelsea():
     No copyright restrictions.  CC0 by the photographer (Stefan van der Walt).
 
     """
-    return load("chelsea.jpg")
+    return load("chelsea.png")