ExampleMetaData.cpp

/* 
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 ExampleMetaData.cpp
   @relates Image, MetaData
   @brief Example for Image/Camera Meta Data usage
   @ingroup g_examples
   @author MIP
*/

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

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

#include <sstream>

// usually this comes from Base/Geometry/HomgPoint2D.hh
#define HOMGPOINT2D_TYPE double

using namespace BIAS;
using namespace std;

int main()
{
  Image<unsigned char> im(256, 256, 1), im2, im3;
  MetaData *md=NULL;
  // point and point2 should be a HomgPoint2D, 
  // they are not of type HomgPoint2D because no cross dependencies
  // between Base/Image and Base/Geometry are desired
  double point[]={2.0, 3.0, 1.0}, point2[3]={0.0, 0.0, 0.0};
  ostringstream ascii;
  string filename="metadata";
  string mipfilename=filename+".mip";
  string pgmfilename=filename+".pgm";
  string tag;
  AppData appdata;

  md=im.GetMetaData();
  BIASASSERT(md!=NULL);
  md->Add(AppData::MD_HomgPoint2D, sizeof(HOMGPOINT2D_TYPE)*3, 
          (char *)point);
  md->Add(AppData::MD_HomgPoint2D, sizeof(HOMGPOINT2D_TYPE)*3, 
          (char *)point);

  ascii <<" [ "<<point[0]<<" "<<point[1]<<" "<<point[2]<<" ]";
  md->Add("#[HomgPoint2D]", ascii.str());
  md->Add("#[HomgPoint2D]", ascii.str());

  
  //if (ImageIO::Save(filename, im)!=0){
  if (ImageIO::Save(filename, im)!=0){
    BIASERR("error writing image "<<filename);
  }
  if (ImageIO::Save(filename, im, ImageIO::FF_pgm)!=0){
    BIASERR("error exporting image "<<filename);
  }

  //if (ImageIO::Load(mipfilename, im2)!=0){
  if (ImageIO::Load(mipfilename, im2)!=0){
    BIASERR("error reading image "<<filename<<".mip");
  }
  md=im2.GetMetaData();
  BIASASSERT(md!=NULL);
  cerr << "found "<<md->size()<<" metadatas in "<<mipfilename<<endl;
  md->Dump();


  if (md->Find(AppData::MD_HomgPoint2D, appdata)!=-1){
    point2[0]=((HOMGPOINT2D_TYPE *)appdata.data)[0];
    point2[1]=((HOMGPOINT2D_TYPE *)appdata.data)[1]; 
    point2[2]=((HOMGPOINT2D_TYPE *)appdata.data)[2];
    cout << " found MD_HomgPoint2D in "<<filename<<".mip : [ "
         <<point2[0]<<" "<<point2[1]<<" "<<point2[2]<<" ]"<<endl;
  } else {
    BIASERR("MD_HomgPoint2D not found in "<<filename<<".mip");
  }

  if (ImageIO::ImportImage(pgmfilename, im3)!=0){
    BIASERR("error importing image "<<filename);
  }

  md=im3.GetMetaData();
  BIASASSERT(md!=NULL);
  cerr << "found "<<md->size()<<" metadatas in "<<pgmfilename<<endl;
  md->Dump();
  
  if (md->Find("#[HomgPoint2D]", appdata)!=-1){
    cout << " found ascii in "<<filename<<".pgm : "
         <<appdata.stag<<appdata.sdata<<endl;
  } else {
    BIASERR("#[HomgPoint2D] not found in "<<filename<<".pgm");
  }

  return 0;
}