From c08a6876d647448d520ad8893065a8baac4be46c Mon Sep 17 00:00:00 2001
From: Vighnesh Birodkar <vighneshbirodkar@gmail.com>
Date: Thu, 26 Jun 2014 02:05:20 +0530
Subject: [PATCH] Added comment about footprint

---
 skimage/graph/rag.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/skimage/graph/rag.py b/skimage/graph/rag.py
index 8017f1f6..4943cf4a 100644
--- a/skimage/graph/rag.py
+++ b/skimage/graph/rag.py
@@ -136,6 +136,13 @@ def rag_meancolor(image, labels, connectivity=2):
         fp[0, ...] = 0
         fp = fp.swapaxes(0, d)
 
+    # For example 
+    # if labels.ndim = 2 and connectivity = 1
+    # fp = [[0,0,0],[0,1,1],[0,1,0]]
+    #
+    # if labels.ndim = 2 and connectivity = 2
+    # fp = [[0,0,0],[0,1,1],[0,1,1]]
+
     filters.generic_filter(
         labels,
         function=_add_edge_filter,