| VectorReal64 Impala::Core::Feature::VisSem::DoSpatialPyramid | ( | Geometry::Rectangle | rect, | |
| VectorReal64 | vec | |||
| ) | [inline, private] |
Definition at line 412 of file VisSem.h.
References Impala::Core::Feature::Computor::mLazebnikPyramid, Impala::Core::Geometry::RectanglePyramidPerDim::NrLevels(), Impala::Core::Geometry::RectanglePyramidPerDim::NrRects(), Impala::Core::Geometry::RectanglePyramidPerDim::Rect(), Impala::Core::Vector::VectorTem< ElemT >::Size(), and Impala::Core::Geometry::RectanglePyramidPerDim::TotalNrRects().
Referenced by ComputeFeaturesPixelSet(), and DoSpatialPyramid().
00413 { 00414 VectorReal64 res(vec.Size() * mLazebnikPyramid.TotalNrRects()); 00415 res = 0.0; 00416 00417 int levelBase = 0; 00418 double normVal = 1.0; // normalization of the pyramid levels 00419 // construct pyramid backwards, to deal with normalization 00420 for (int level=mLazebnikPyramid.NrLevels()-1 ; level>=0 ; level--) 00421 { 00422 // set lazebnik spatial pyramid normalization proportial 00423 // to the number of cells (as Lazebnik does) 00424 if (level != mLazebnikPyramid.NrLevels() - 1) 00425 { 00426 normVal = normVal / ((double)mLazebnikPyramid.NrRects(level+1) / 00427 mLazebnikPyramid.NrRects(level)); 00428 } 00429 00430 int nrRect = mLazebnikPyramid.NrRects(level); 00431 for (int r=0 ; r<nrRect ; r++) 00432 { 00433 Geometry::Rectangle rectLazeb = mLazebnikPyramid.Rect(level, r); 00434 // if rect intersects with rectLazebnik, add it to the 00435 // lazebnikpyramid-bin. This allows putting overlapping 00436 // regions in multiple lazebnikpyramid-bins. 00437 if (rectLazeb.Intersects(rect)) 00438 { 00439 int rectBase = levelBase + r * vec.Size(); 00440 for (int i=0 ; i<vec.Size() ; i++) 00441 { 00442 // do normVal squared, cause later the Vector::Avg is 00443 // taken, with a lot of zeros which will counterbalance 00444 // normVal once (leaving one) 00445 res[rectBase + i] = vec[i] * normVal * normVal; 00446 } 00447 } 00448 } 00449 levelBase += nrRect * vec.Size(); 00450 } 00451 return res; 00452 }
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