ExampleCornerDetector.cpp

Example for usage of CornerDetector Usage: ExampleCornerDetector [parameter] <im1> <im2> [ <im3> ... ]

, CornerDetectorHarris, CornerDetectorKLT, CornerDetectorSusan

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 ExampleCornerDetector.cpp
   @relates CornerDetectorFoerstner, CornerDetectorHarris, CornerDetectorKLT, CornerDetectorSusan
   @brief Example for usage of CornerDetector
   Usage: ExampleCornerDetector [parameter] <im1> <im2> [ <im3> ... ]
   @ingroup g_examples
   @author MIP
*/

#include <bias_config.h>
#include <FeatureDetector/CornerDetectorFoerstner.hh>
#include <FeatureDetector/CornerDetectorHarris.hh>
#include <FeatureDetector/CornerDetectorSusan.hh>
#include <FeatureDetector/CornerDetectorKLT.hh>
#include <FeatureDetector/LinearRegionDetector.hh>
#include <Base/Image/ColourRGB.hh>
#include <Base/ImageUtils/ImageDraw.hh>
#include <Base/Image/ImageConvert.hh>
#include <Base/Image/ImageIO.hh>

using namespace BIAS;
using namespace std;

#define type 1
#if type == 0

#ifdef BUILD_IMAGE_INT
#define StorageType unsigned char
#define KernelType int
#else
#define StorageType unsigned char
#define KernelType float
#endif

#elif type == 1

#define StorageType float
#define KernelType float

#endif

void Draw(Image<unsigned char>& im, vector<HomgPoint2D>& p)
{
  ColourRGB<unsigned char> col(0, 255, 0);
  const int nump=p.size();
  unsigned start[2];
  unsigned radius=10;

  for (int l=0; l<nump; l++){
    if (!p[l].IsAtInfinity()){
      // circel around corner in actual image
      start[0]=(unsigned)rint(p[l][0]);
      start[1]=(unsigned)rint(p[l][1]);
      ImageDraw<unsigned char>::Circle(im, start[0], start[1],
                                                   radius, col);
    }
  }
}

int main(int argc, char *argv[])
{
  CornerDetectorBase<StorageType> *cd = NULL;
#if type ==1
  CornerDetectorGradient<StorageType, KernelType>* cdg = NULL;
#endif

#if type == 0
  CornerDetectorSusan<StorageType> cds;
  cds.SetMaxNumFeatures(1000);
#endif
  CornerDetectorKLT<StorageType, KernelType> cdklt;
  CornerDetectorHarris<StorageType, KernelType> cdh;
  CornerDetectorFoerstner<StorageType, KernelType> cdf;

  Image<unsigned char> ucim, rgbim;
  Image<StorageType> im;
  vector<HomgPoint2D> p;
  vector<QUAL> qual;

  int argind = 1;
  if (argc-argind<1 || argind<1){
    cerr << argv[0] << " [parameter] <im1> <im2> [ <im3> ... ] \n";
    return -2;
  }

  int cdt = CornerDetectorBase<StorageType>::CDT_KLT;

  switch (cdt){
  case CornerDetectorBase<StorageType>::CDT_Susan:
#if type == 0
    cd = &cds;
#else
    BIASERR("susan only implemented for unsigned char");
#endif
    break;
  case CornerDetectorBase<StorageType>::CDT_KLT:
    cd = &cdklt;
    cout << "corner detector klt has been chosen " << endl;
    cdklt.SetMinCornerness(400);
#if type ==1
    cdg = &cdklt;
#endif
    break;
  case CornerDetectorBase<StorageType>::CDT_Harris:
    cd = &cdh;
  cout << "corner detector harris has been chosen " << endl;
#if type == 1
  cdg = &cdh;
#endif
    break;
  case CornerDetectorBase<StorageType>::CDT_Foerstner:
    cd = &cdf;
#if type == 1
  cdg = &cdf;
#endif
    break;
  default:
    BIASERR("unknown corner detector type");
    BIASABORT
    break;
  }

  bool WantLinearRegionDetector = false;
  if (WantLinearRegionDetector) {
    cout << "CornerDetector not used, detecting LINEAR regions ..."<<endl;
    LinearRegionDetector<StorageType, KernelType> cdl;
    cd = &cdl;
    cd->AddDebugLevel(D_CD_WRITE_DEBUG_IM);
    cd->AddDebugLevel(D_CD_FEATURES);
  }

  for (int i=argind; i<argc; i++){
#if type == 0
    if (ImageIO::Load(argv[i], im)!=0){
#else
    if (ImageIO::Load(argv[i], ucim)!=0){
#endif
      BIASERR("error loading image "<<argv[i]);
      return -1;
    } else {
      cerr << "read "<<argv[i]<<endl;
    }

    ImageBase tempimage;

#if type == 0
    ImageConvert::Convert(im, tempimage, ImageBase::CM_Grey);
    im = tempimage;
#else
    ImageConvert::Convert(ucim, tempimage, ImageBase::CM_Grey);
    ucim = tempimage;
#endif


#if type != 0
    if (ImageConvert::ConvertST(ucim, im, ImageBase::ST_float)!=0){
      BIASERR("error converting image "<<argv[i]);
    }
    ImageIO::Save("fimage.mip", im);
#endif

#if type == 0
    if (cd->Detect(im, p, qual)!=0) {
      cerr<<"Corner detector indicated an error !"<<endl;
    }
#endif

#if type == 1
    if (cdg->Detect(im, p, qual)!=0) {
       cerr<<"Corner detector indicated an error !"<<endl;
    }
#endif

    cerr << "found "<<p.size()<<" corners"<<endl;

    for (unsigned int r=0; r<p.size(); r++) {
      cout <<setw(5)<<r<<" : "<<p[r]<<" with quality "<<qual[r]<<endl;
    }

#if type == 0
    ImageConvert::Convert(im, rgbim, ImageBase::CM_RGB);
#else
    ImageConvert::Convert(ucim, rgbim, ImageBase::CM_RGB);
#endif
    Draw(rgbim, p);

    ostringstream name;
    name << "corners-"<<setw(4)<<setfill('0')<<i-argind<<".mip";
    //ImageIO::Save(name.str(), rgbim);
    ImageIO::Save(name.str(), rgbim);

  }

  return 0;
}