BUG: More Python3 fixes by Christoph Gohlke.

scikits/image/io/_plugins/util.py

@@ -1,6 +1,6 @@
 import numpy as np
-import _colormixer
-import _histograms
+from . import _colormixer
+from . import _histograms
 import threading
 
 # utilities to make life easier for plugin writers.

scikits/image/io/tests/test_collection.py

@@ -1,3 +1,4 @@
+import sys
 import os.path
 
 import numpy as np
@@ -7,6 +8,10 @@ from scikits.image import data_dir
 from scikits.image.io import ImageCollection, MultiImage
 
 
+if sys.version_info[0] > 2:
+    basestring = str
+
+
 class TestImageCollection():
     pattern = [os.path.join(data_dir, pic) for pic in ['camera.png',
                                                        'color.png']]