From e531e57124a71739f834c23ea930cfb40cb823d3 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steven.silvester@ieee.org>
Date: Wed, 25 Mar 2015 22:22:06 -0500
Subject: [PATCH] Only index tif and gif files in collection

---
 skimage/io/collection.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/skimage/io/collection.py b/skimage/io/collection.py
index aab7cb86..cdcb31d6 100644
--- a/skimage/io/collection.py
+++ b/skimage/io/collection.py
@@ -201,7 +201,7 @@ class ImageCollection(object):
             if fname.lower().endswith(('.tiff', '.tif')):
                 img = TiffFile(fname)
                 index += [(fname, i) for i in range(len(img.pages))]
-            else:
+            elif fname.lower().endswith('gif'):
                 im = Image.open(fname)
                 try:
                     # this will raise an IOError if the file is not readable
@@ -221,6 +221,8 @@ class ImageCollection(object):
                         i += 1
                 if hasattr(im, 'fp') and im.fp:
                     im.fp.close()
+            else:
+                index += (fname, 0)
 
         self._frame_index = index
         return len(index)