CByteImage
HOGFeatureExtractor::render(const Feature& f) const
{
CShape cellShape = _oriMarkers[0].Shape();
CFloatImage hogImgF(CShape(cellShape.width * f.Shape().width, cellShape.height * f.Shape().height, 1));
hogImgF.ClearPixels();
float minBinValue, maxBinValue;
f.getRangeOfValues(minBinValue, maxBinValue);
// For every cell in the HOG
for(int hi = 0; hi < f.Shape().height; hi++) {
for(int hj = 0; hj < f.Shape().width; hj++) {
// Now _oriMarkers, multiplying contribution by bin level
for(int hc = 0; hc < _nAngularBins; hc++) {
float v = f.Pixel(hj, hi, hc) / maxBinValue;
for(int ci = 0; ci < cellShape.height; ci++) {
float* cellIt = (float*) _oriMarkers[hc].PixelAddress(0, ci, 0);
float* hogIt = (float*) hogImgF.PixelAddress(hj * cellShape.height, hi * cellShape.height + ci, 0);
for(int cj = 0; cj < cellShape.width; cj++, hogIt++, cellIt++) {
(*hogIt) += v * (*cellIt);
}
}
}
}
}
CByteImage hogImg;
TypeConvert(hogImgF, hogImg);
return hogImg;
}
CByteImage
FeatureExtractor::render(const Feature& f, bool normalizeFeat) const
{
if(normalizeFeat) {
CShape shape = f.Shape();
Feature fAux(shape);
float fMin, fMax;
f.getRangeOfValues(fMin, fMax);
for(int y = 0; y < shape.height; y++) {
float* fIt = (float*) f.PixelAddress(0,y,0);
float* fAuxIt = (float*) fAux.PixelAddress(0,y,0);
for(int x = 0; x < shape.width * shape.nBands; x++, fAuxIt++, fIt++) {
*fAuxIt = (*fIt) / fMax;
}
}
return this->render(fAux);
} else {
return this->render(f);
}
}
