void
test_appl_main(void *arg)
{
unsigned n = (unsigned) arg;
int rc;
printf("%s\n", "test_appl task starting...");
rc = k9_sem_take(test_sem, n, n == 10 ? 10 : K9_TMOUT_FOREVER);
printf("test_appl: ");
PRINT_EXPR("%d", rc);
printf("\n");
printf("%s\n", "test_appl task exiting");
}
HOGFeatureExtractor::HOGFeatureExtractor(int nAngularBins, bool unsignedGradients, int cellSize):
_nAngularBins(nAngularBins),
_unsignedGradients(unsignedGradients),
_cellSize(cellSize)
{
_kernelDx.ReAllocate(CShape(3, 1, 1), derivKvals, false, 1);
_kernelDx.origin[0] = 1;
_kernelDy.ReAllocate(CShape(1, 3, 1), derivKvals, false, 1);
_kernelDy.origin[0] = 1;
// For visualization
// A set of patches representing the bin orientations. When drawing a hog cell
// we multiply each patch by the hog bin value and add all contributions up to
// form the visual representation of one cell. Full HOG is achieved by stacking
// the viz for individual cells horizontally and vertically.
_oriMarkers.resize(_nAngularBins);
const int ms = 11;
CShape markerShape(ms, ms, 1);
// First patch is a horizontal line
_oriMarkers[0].ReAllocate(markerShape, true);
_oriMarkers[0].ClearPixels();
for(int i = 1; i < ms - 1; i++) _oriMarkers[0].Pixel(/*floor(*/ ms/2 /*)*/, i, 0) = 1;
#if 0 // debug
std::cout << "DEBUG:" << __FILE__ << ":" << __LINE__ << std::endl;
for(int i = 0; i < ms; i++) {
for(int j = 0; j < ms; j++) {
std::cout << _oriMarkers[0].Pixel(j, i, 0) << " ";
}
std::cout << std::endl;
}
std::cout << std::endl;
char debugFName[2000];
sprintf(debugFName, "/tmp/debug%03d.tga", 0);
PRINT_EXPR(debugFName);
WriteFile(_oriMarkers[0], debugFName);
#endif
// The other patches are obtained by rotating the first one
CTransform3x3 T = CTransform3x3::Translation((ms - 1) / 2.0, (ms - 1) / 2.0);
for(int angBin = 1; angBin < _nAngularBins; angBin++) {
double theta;
if(unsignedGradients) theta = 180.0 * (double(angBin) / _nAngularBins);
else theta = 360.0 * (double(angBin) / _nAngularBins);
CTransform3x3 R = T * CTransform3x3::Rotation(theta) * T.Inverse();
_oriMarkers[angBin].ReAllocate(markerShape, true);
_oriMarkers[angBin].ClearPixels();
WarpGlobal(_oriMarkers[0], _oriMarkers[angBin], R, eWarpInterpLinear);
#if 0 // debug
char debugFName[2000];
sprintf(debugFName, "/tmp/debug%03d.tga", angBin);
PRINT_EXPR(debugFName);
WriteFile(_oriMarkers[angBin], debugFName);
#endif
}
}