diff --git a/CONTRIBUTORS.txt b/CONTRIBUTORS.txt
index fd3ff235..9f3f2aa7 100644
--- a/CONTRIBUTORS.txt
+++ b/CONTRIBUTORS.txt
@@ -126,3 +126,6 @@
 
 - Steven Silvester, Karel Zuiderveld
   Adaptive Histogram Equalization
+
+- Anders Boesen Lindbo Larsen
+  Dense DAISY feature description, circle perimeter drawing.