| void Impala::Core::Feature::InterestPointFeature::ProjectUNC | ( | Mat * | matrixDescriptors, | |
| int | imageWidth, | |||
| int | imageHeight, | |||
| std::vector< int > & | X, | |||
| std::vector< int > & | Y, | |||
| std::vector< int > & | regionCounts | |||
| ) | [inline, private] |
Definition at line 539 of file InterestPointFeature.h.
References Impala::Core::Table::TableTem< Col1T, Col2T, Col3T, Col4T, Col5T, Col6T, Col7T, Col8T, Col9T >::GetColumn2(), Impala::CmdOptions::GetInstance(), ILOG_DEBUG, ILOG_INFO, Impala::Core::Matrix::MatE(), Impala::Core::Matrix::MatMul(), Impala::Core::Matrix::MatNorm2DistTransposed(), Impala::Core::Matrix::MatNrCol(), Impala::Core::Matrix::MatNrRow(), Impala::Core::Matrix::MatSumAxis1(), mCodebook, mDescriptorReduce, mLastCodebookVectors, mPointSelector, Impala::Application::DemoCamera2d::sigma, Impala::Core::Table::Table::Size(), and Impala::Timer::SplitTimeStr().
Referenced by ProjectOntoCodebook().
00542 { 00543 using namespace Matrix; 00544 Timer timerProjection; 00545 if(mDescriptorReduce) 00546 { 00547 matrixDescriptors = MatMul(matrixDescriptors, mDescriptorReduce); 00548 } 00549 Mat* matrixCodebook = mCodebook->GetColumn2()->GetStorage(); 00550 ILOG_DEBUG(MatNrRow(matrixDescriptors) << " " << 00551 MatNrCol(matrixDescriptors)); 00552 ILOG_DEBUG(MatNrRow(matrixCodebook) << " " << 00553 MatNrCol(matrixCodebook)); 00554 ILOG_DEBUG("Codebook projection (init) took: " << 00555 timerProjection.SplitTimeStr()); 00556 00557 int step = 10000; 00558 for(int k = 0; k < MatNrRow(matrixDescriptors); k += step) 00559 { 00560 int s = MatNrRow(matrixDescriptors) - k; 00561 if(step < s) s = step; 00562 00563 Mat* partial = MatCreate<Mat>(s, MatNrCol(matrixDescriptors), 00564 MatE(matrixDescriptors, k, 0), true); 00565 00566 // result will be a (#partial-descriptors, codebook size) matrix 00567 Mat* distances = MatNorm2DistTransposed(partial, 00568 matrixCodebook); 00569 delete partial; 00570 00571 ILOG_DEBUG("Codebook projection (matrix) took: " << 00572 timerProjection.SplitTimeStr()); 00573 CmdOptions& options = CmdOptions::GetInstance(); 00574 Real64 sigma = options.GetDouble("codebookSigma"); 00575 00576 // pull a Gaussian kernel over the Euclidian distances 00577 for(int vj = 0; vj < s; vj++) 00578 { 00579 for(int i = 0; i < mCodebook->Size(); i++) 00580 { 00581 Real64 value = *MatE(distances, vj, i); 00582 *MatE(distances, vj, i) = exp((-0.5 * value * value) / 00583 (sigma * sigma)); 00584 } 00585 } 00586 00587 // sum over axis 0 for the normalization factor 00588 // expected size is (#descriptors, 1) 00589 Mat* normalizationFactor = MatSumAxis1(distances); 00590 ILOG_DEBUG("normalizationFactor: " << MatNrRow(normalizationFactor) 00591 << " " << MatNrCol(normalizationFactor)); 00592 00593 // perform normalization 00594 for(int vj = 0; vj < s; vj++) 00595 { 00596 for(int i = 0; i < mCodebook->Size(); i++) 00597 { 00598 *MatE(distances, vj, i) = *MatE(distances, vj, i) / 00599 *MatE(normalizationFactor, vj, 0); 00600 } 00601 } 00602 delete normalizationFactor; 00603 00604 // remains: sum over the *right* descriptors 00605 for(int vj = 0; vj < s; vj++) 00606 { 00607 for(int ps = 0; ps < mPointSelector.size(); ps++) 00608 { 00609 if(mPointSelector[ps]->Accept(X[k+vj], Y[k+vj], 00610 imageWidth, imageHeight)) 00611 { 00612 for(int i = 0; i < mCodebook->Size(); i++) 00613 { 00614 mLastCodebookVectors[ps]->Elem(i) = 00615 mLastCodebookVectors[ps]->Elem(i) + 00616 *MatE(distances, vj, i); 00617 } 00618 regionCounts[ps] = regionCounts[ps] + 1; 00619 } 00620 } 00621 } 00622 delete distances; 00623 ILOG_DEBUG("Codebook projection (piece) took: " << 00624 timerProjection.SplitTimeStr() << " " << mPointSelector.size()); 00625 } 00626 ILOG_INFO("Codebook projection (UNC/" << MatNrRow(matrixDescriptors) << 00627 ") took: " << timerProjection.SplitTimeStr()); 00628 if(mDescriptorReduce) 00629 { 00630 delete matrixDescriptors; 00631 } 00632 }
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