Index: trunk/src/transform_field/ima_color2BW.m
===================================================================
--- trunk/src/transform_field/ima_color2BW.m	(revision 823)
+++ trunk/src/transform_field/ima_color2BW.m	(revision 823)
@@ -0,0 +1,34 @@
+% 'ima_color2BW': transform a color image to grey scale image 
+%------------------------------------------------------------------------
+%%%%  Use the general syntax for transform fields with a single input %%%%
+% OUTPUT: 
+% DataOut:   output field structure 
+%
+%INPUT:
+% DataIn:  first input field structure
+
+%=======================================================================
+% Copyright 2008-2014, LEGI UMR 5519 / CNRS UJF G-INP, Grenoble, France
+%   http://www.legi.grenoble-inp.fr
+%   Joel.Sommeria - Joel.Sommeria (A) legi.cnrs.fr
+%
+%     This file is part of the toolbox UVMAT.
+%
+%     UVMAT is free software; you can redistribute it and/or modify
+%     it under the terms of the GNU General Public License as published
+%     by the Free Software Foundation; either version 2 of the license,
+%     or (at your option) any later version.
+%
+%     UVMAT is distributed in the hope that it will be useful,
+%     but WITHOUT ANY WARRANTY; without even the implied warranty of
+%     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+%     GNU General Public License (see LICENSE.txt) for more details.
+%=======================================================================
+
+function DataOut=ima_color2BW(DataIn)
+
+DataOut=DataIn; %default
+if ndims(DataOut.A)==3
+    DataOut.A=uint16(sum(double(DataOut.A,3)));%sum on color components, transform in 16 bit BW images
+end
+