static void DiscardMissizedFaces(
vec_DetPar& detpars) // io
{
// constants (TODO These have not yet been rigorously empirically adjusted.)
static const double MIN_WIDTH = 1.33; // as fraction of median width
static const double MAX_WIDTH = 1.33; // as fraction of median width
if (NSIZE(detpars) >= 3) // need at least 3 faces
{
// sort the faces on their width (smallest first) so can get median width
sort(detpars.begin(), detpars.end(), DecreasingWidth);
const int median = cvRound(detpars[NSIZE(detpars) / 2].width);
const int minallowed = cvRound(median / MIN_WIDTH);
const int maxallowed = cvRound(MAX_WIDTH * median);
// keep only faces that are not too big or small
vec_DetPar all_detpars(detpars);
detpars.resize(0);
for (int iface = 0; iface < NSIZE(all_detpars); iface++)
{
DetPar* face = &all_detpars[iface];
if (face->width >= minallowed && face->width <= maxallowed)
detpars.push_back(*face);
else if (trace_g || TRACE_IMAGES)
lprintf("[discard face%d of %d]", iface, NSIZE(all_detpars));
}
}
}
