example5.c

this is code for finding and tracking feature points

/**********************************************************************
Demonstrates manually tweaking the tracking context parameters.
**********************************************************************/

#include "pnmio.h"
#include "klt.h"

#ifdef WIN32
int RunExample5()
#else
int main()
#endif
{
  unsigned char *img1, *img2;
  KLT_TrackingContext tc;
  KLT_FeatureList fl;
  int nFeatures = 100;
  int ncols, nrows;

  tc = KLTCreateTrackingContext();
  tc->mindist = 20;
  tc->window_width  = 9;
  tc->window_height = 9;
  KLTChangeTCPyramid(tc, 15);
  KLTUpdateTCBorder(tc);
  fl = KLTCreateFeatureList(nFeatures);

  img1 = pgmReadFile("img0.pgm", NULL, &ncols, &nrows);
  img2 = pgmReadFile("img2.pgm", NULL, &ncols, &nrows);

  KLTSelectGoodFeatures(tc, img1, ncols, nrows, fl);

  KLTWriteFeatureListToPPM(fl, img1, ncols, nrows, "feat1b.ppm");

  KLTTrackFeatures(tc, img1, img2, ncols, nrows, fl);

  KLTWriteFeatureListToPPM(fl, img2, ncols, nrows, "feat2b.ppm");

  return 0;
}