unit filterCanny;
(* ***** BEGIN LICENSE BLOCK *****
 * Copyright (C) 2004 Durand Emmanuel
 * Copyright (C) 2004 Burgel Eric
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Contact :
 *   filters@edurand.com
 *   filters@burgel.com
 *
 * ***** END LICENSE BLOCK ***** *)

{
 edurand (filters@edurand.com)
}

{
 use 'OpenCv' implementation
}

{
 doc : http://www.pages.drexel.edu/~weg22/can_tut.html
}

interface
uses
  filter, fparameters, image;

type
  TFilterCanny = class(TFilter)
  public
    constructor Create; override;
    procedure Run(); override;
  private
    parameterImageIn, parameterImageOut : TParameterImage;
    parameterThreshold1 : TParameterInteger;
    parameterThreshold2 : TParameterInteger;
  end;

implementation
uses
  imageIO, wrapper_opencv;

constructor TFilterCanny.Create;
begin
  inherited;
  parameterImageIn:=addParameterImage('inImage', 'input image');
  parameterImageOut:=addParameterImage('outImage', 'result image');
  parameterThreshold1:=addParameterInteger('threshold1','threshold1',0,255,100);
  parameterThreshold2:=addParameterInteger('threshold2','threshold1',0,255,100);
end;

procedure TFilterCanny.Run();
begin
  if (parameterImageIn.Image<>nil) and (parameterImageOut.Image<>nil) then begin
    wrapper_opencv.filterCvCanny(parameterImageIn.Image,parameterImageOut.Image,parameterThreshold1.Value,parameterThreshold2.Value);
  end;
end;

end.