ExampleMinMax.cpp

Example for determination if min and max pixel value in images

Author

MIP

/* 
This file is part of the BIAS library (Basic ImageAlgorithmS).

Copyright (C) 2003-2009    (see file CONTACT for details)
  Multimediale Systeme der Informationsverarbeitung
  Institut fuer Informatik
  Christian-Albrechts-Universitaet Kiel


BIAS 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.

BIAS 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 BIAS; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

/**
   @example ExampleMinMax.cpp
   @relates ImageBase
   @brief Example for determination if min and max pixel value in images
   @ingroup g_examples
   @author MIP
*/

// must be first:
//#include <Base/Common/LeakChecking.h> 

#include <Base/Common/BIASpragma.hh>

#include <iostream>

#include <Base/Image/ImageBase.hh>
#include <Base/Image/ImageConvert.hh>
#include <Base/Image/ImageIO.hh>

using namespace BIAS;
using namespace std;

int main()
{
  bool interleaved=false;
  Image<unsigned char> im(640, 480, 3, interleaved);
  unsigned mincoo[2], maxcoo[2];
  
  // set whole image
  unsigned char col[]={98, 234, 1};
  im.FillImageWithConstValue(col);

  unsigned w=im.GetWidth();
  unsigned h=im.GetHeight();

  //im.SetROI(w>>2, h>>2, w-(w>>2), h-(h>>2));
  im.SetROICorners(w>>2, h>>2, w-(w>>2), h-(h>>2));

  
  // now set only ROI to uniform grey
  col[0]=col[1]=col[2]=128;
  im.FillImageWithConstValue(col);

  im.PrintHeader(cout);
  cout << endl << (int)im.GetImageData()[0] << " " 
       << (int)im.GetImageData()[1]
       << " " << (int)im.GetImageData()[2] << endl; 
  
  // now set two pixels in roi in channel c
  int c=0;
  im.SetPixel((unsigned char)215, ((w>>1)+2), (h>>1)+2, c);
  im.SetPixel((unsigned char)45, ((w>>1)-7), (h>>1)+5, c);
  
  unsigned char min, max;
  im.AddDebugLevel(D_IMAGE_MINMAXCOO);
  im.GetMinMaxPixelValue(min, max, 1);
  cerr << "min: "<<(int)min<<"\tmax: "<<(int)max<<endl;
  im.GetMinMaxPixelValue(min, max, 1, mincoo, maxcoo);
  cerr << "min: "<<(int)min<<" at ("<<mincoo[0]<<", "<<mincoo[1]
       <<")\tmax: "<<(int)max<<" at ("<<maxcoo[0]<<", "<<maxcoo[1]<<")\n";

  //ImageIO::Save("minmax-img.mip", im);
  ImageIO::Save("minmax-img.mip", im);


  return 0;
}