From c9e8356cf6458e6a6316fd014fdc55ad3251aadb Mon Sep 17 00:00:00 2001
From: Alex Izvorski <aizvorski@gmail.com>
Date: Sun, 1 May 2016 13:53:30 -0700
Subject: [PATCH] Speed up _convert

---
 skimage/color/colorconv.py | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/skimage/color/colorconv.py b/skimage/color/colorconv.py
index 8f2b82c0..93961c49 100644
--- a/skimage/color/colorconv.py
+++ b/skimage/color/colorconv.py
@@ -502,14 +502,8 @@ def _convert(matrix, arr):
         The converted array.
     """
     arr = _prepare_colorarray(arr)
-    arr = np.swapaxes(arr, 0, -1)
-    oldshape = arr.shape
-    arr = np.reshape(arr, (3, -1))
-    out = np.dot(matrix, arr)
-    out.shape = oldshape
-    out = np.swapaxes(out, -1, 0)
 
-    return np.ascontiguousarray(out)
+    return np.dot(arr, matrix.T.copy())
 
 
 def xyz2rgb(xyz):