From 08019c36e5f72d2379deb9f24c99bb7657904698 Mon Sep 17 00:00:00 2001
From: Kyle Jackson <k.jackson0794@gmail.com>
Date: Sat, 23 Jul 2016 19:24:07 -0400
Subject: [PATCH] DOC: corrected mssim docstring to return float

---
 skimage/measure/_structural_similarity.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/skimage/measure/_structural_similarity.py b/skimage/measure/_structural_similarity.py
index 6b4948e0..f236ff43 100644
--- a/skimage/measure/_structural_similarity.py
+++ b/skimage/measure/_structural_similarity.py
@@ -54,7 +54,7 @@ def compare_ssim(X, Y, win_size=None, gradient=False,
 
     Returns
     -------
-    mssim : float or ndarray
+    mssim : float
         The mean structural similarity over the image.
     grad : ndarray
         The gradient of the structural similarity index between X and Y [2]_.