From b70d423aab5a443cf608c65c880d163c73b2190e Mon Sep 17 00:00:00 2001
From: Juan Nunez-Iglesias <juan.n@unimelb.edu.au>
Date: Wed, 18 Jun 2014 16:46:51 +1000
Subject: [PATCH] Add default values for background in _label2rgb_avg

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

diff --git a/skimage/color/colorlabel.py b/skimage/color/colorlabel.py
index f76eeebb..e373dc16 100644
--- a/skimage/color/colorlabel.py
+++ b/skimage/color/colorlabel.py
@@ -156,7 +156,7 @@ def _label2rgb_overlay(label, image=None, colors=None, alpha=0.3,
     return result
 
 
-def _label2rgb_avg(label_field, image, bg_label, bg_color):
+def _label2rgb_avg(label_field, image, bg_label=0, bg_color=(0, 0, 0)):
     """Visualise each segment in `label_field` with its mean color in `image`.
 
     Parameters