Index: trunk/src/transform_field/ima_erode_particles.m
===================================================================
--- trunk/src/transform_field/ima_erode_particles.m	(revision 899)
+++ trunk/src/transform_field/ima_erode_particles.m	(revision 899)
@@ -0,0 +1,51 @@
+% 'ima_remove_particles': removes particles from an image (keeping the local minimum)
+% requires the Matlab image processing toolbox
+%------------------------------------------------------------------------
+%%%%  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_remove_particles(DataIn)
+%------------------------------------------------------------------------
+DataOut=[];  %default  output field
+if strcmp(DataIn,'*')
+    return
+end
+
+%parameters
+radius=2;
+SE=strel('disk',2);
+%--------------------------------------------------------- 
+DataOut=DataIn;%default
+
+if ~isfield(DataIn,'A')
+    DataOut.Txt='remove_particles only valid for input images';
+    return
+end
+
+%BACKGROUND LEVEL
+Atype=class(DataIn.A);
+DataOut.A=imerode(DataIn.A,SE);
+% DataOut.A=feval(Atype,DataOut.A);
+