diff --git a/CONTRIBUTORS.txt b/CONTRIBUTORS.txt
index baaf064b..b00593c7 100644
--- a/CONTRIBUTORS.txt
+++ b/CONTRIBUTORS.txt
@@ -74,6 +74,7 @@
 
 - Andreas Mueller
   Example data set loader.
+  Quickshift image segmentation, Felzenszwalbs fast graph based segmentation.
 
 - Yaroslav Halchenko
   For sharing his expert advice on Debian packaging.