Index: trunk/src/transform_field/ima_crop.m
===================================================================
--- trunk/src/transform_field/ima_crop.m	(revision 991)
+++ trunk/src/transform_field/ima_crop.m	(revision 991)
@@ -0,0 +1,53 @@
+% 'ima_crop': removes an upper and lower band to the image
+
+%------------------------------------------------------------------------
+%%%%  Use the general syntax for transform fields with a single input and parameters %%%%
+% OUTPUT: 
+% DataOut:   output field structure 
+%
+%INPUT:
+% DataIn:  input field structure
+% Param: matlab structure whose field Param.TransformInput contains the filter parameters
+%-----------------------------------
+
+%=======================================================================
+% Copyright 2008-2017, LEGI UMR 5519 / CNRS UGA 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_crop(DataIn,Param)
+
+%% request input parameters
+if isfield(DataIn,'Action') && isfield(DataIn.Action,'RUN') && isequal(DataIn.Action.RUN,0)
+    prompt = {'npy_upper';'npy_lower'};
+    dlg_title = 'remove image lines above and below';
+    num_lines= 2;
+    def     = { '0';'0'};
+    if isfield(Param,'TransformInput')&&isfield(Param.TransformInput,'CropUpper')&&...
+            isfield(Param.TransformInput,'CropLower')
+        def={num2str(Param.TransformInput.CropUpper);num2str(Param.TransformInput.CropLower)};
+    end
+    answer = inputdlg(prompt,dlg_title,num_lines,def);
+    DataOut.TransformInput.CropUpper=str2num(answer{1}); %size of the filtering window
+    DataOut.TransformInput.CropLower=str2num(answer{2}); %size of the filtering window
+    return
+end
+
+DataOut=DataIn; %default
+
+DataOut.A(1:Param.TransformInput.CropUpper,:)=[];
+DataOut.A(end-Param.TransformInput.CropLower+1:end,:)=[];
+