Index: trunk/src/transform_field/ima_edge_detection.m
===================================================================
--- trunk/src/transform_field/ima_edge_detection.m	(revision 1175)
+++ trunk/src/transform_field/ima_edge_detection.m	(revision 1179)
@@ -1,3 +1,4 @@
 % 'ima_edge_detection': find edges 
+% requires MATLAB Image Processing toolbox
 
 %------------------------------------------------------------------------
Index: trunk/src/transform_field/ima_patch_detection.m
===================================================================
--- trunk/src/transform_field/ima_patch_detection.m	(revision 1175)
+++ trunk/src/transform_field/ima_patch_detection.m	(revision 1179)
@@ -1,4 +1,4 @@
-% 'ima_edge_detection': find edges 
-
+% 'ima_patch_detection': find patches 
+% requires the Matlab image processing toolbox
 %------------------------------------------------------------------------
 %%%%  Use the general syntax for transform fields with a single input and parameters %%%%