mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-08 13:23:51 +00:00
139 lines
5.0 KiB
C++
139 lines
5.0 KiB
C++
//============================================================================
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt for details.
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//
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//============================================================================
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#include <vtkm/cont/Algorithm.h>
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#include <vtkm/cont/ArrayCopy.h>
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#include <vtkm/cont/ErrorFilterExecution.h>
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#include <vtkm/cont/Logging.h>
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#include <vtkm/cont/UncertainCellSet.h>
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#include <vtkm/filter/image_processing/ImageDifference.h>
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#include <vtkm/filter/image_processing/worklet/ImageDifference.h>
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#include <vtkm/worklet/AveragePointNeighborhood.h>
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namespace vtkm
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{
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namespace filter
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{
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namespace image_processing
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{
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namespace
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{
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struct GreaterThanThreshold
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{
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GreaterThanThreshold(const vtkm::FloatDefault& thresholdError)
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: ThresholdError(thresholdError)
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{
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}
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VTKM_EXEC_CONT bool operator()(const vtkm::FloatDefault& x) const { return x > ThresholdError; }
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vtkm::FloatDefault ThresholdError;
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};
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} // anonymous namespace
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VTKM_CONT ImageDifference::ImageDifference()
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{
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this->SetPrimaryField("image-1");
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this->SetSecondaryField("image-2");
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this->SetOutputFieldName("image-diff");
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}
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VTKM_CONT vtkm::cont::DataSet ImageDifference::DoExecute(const vtkm::cont::DataSet& input)
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{
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this->ImageDiffWithinThreshold = true;
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const auto& primaryField = this->GetFieldFromDataSet(input);
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if (!primaryField.IsPointField())
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{
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throw vtkm::cont::ErrorFilterExecution("Point field expected.");
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}
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VTKM_LOG_S(vtkm::cont::LogLevel::Info, "Performing Image Difference");
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auto inputCellSet = input.GetCellSet().ResetCellSetList<VTKM_DEFAULT_CELL_SET_LIST_STRUCTURED>();
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const auto& secondaryField = this->GetFieldFromDataSet(1, input);
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vtkm::cont::UnknownArrayHandle diffOutput;
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vtkm::cont::ArrayHandle<vtkm::FloatDefault> thresholdOutput;
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auto resolveType = [&](const auto& primaryArray) {
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// use std::decay to remove const ref from the decltype of primaryArray.
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using T = typename std::decay_t<decltype(primaryArray)>::ValueType;
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vtkm::cont::ArrayHandle<T> secondaryArray;
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vtkm::cont::ArrayCopyShallowIfPossible(secondaryField.GetData(), secondaryArray);
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vtkm::cont::ArrayHandle<T> primaryOutput;
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vtkm::cont::ArrayHandle<T> secondaryOutput;
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if (this->AverageRadius > 0)
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{
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VTKM_LOG_S(vtkm::cont::LogLevel::Info,
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"Performing Average with radius: " << this->AverageRadius);
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auto averageWorklet = vtkm::worklet::AveragePointNeighborhood(this->AverageRadius);
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this->Invoke(averageWorklet, inputCellSet, primaryArray, primaryOutput);
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this->Invoke(averageWorklet, inputCellSet, secondaryArray, secondaryOutput);
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}
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else
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{
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VTKM_LOG_S(vtkm::cont::LogLevel::Info, "Not performing average");
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vtkm::cont::ArrayCopyShallowIfPossible(primaryArray, primaryOutput);
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secondaryOutput = secondaryArray;
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}
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vtkm::cont::ArrayHandle<T> diffArray;
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if (this->PixelShiftRadius > 0)
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{
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VTKM_LOG_S(vtkm::cont::LogLevel::Info, "Diffing image in Neighborhood");
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this->Invoke(vtkm::worklet::ImageDifferenceNeighborhood(this->PixelShiftRadius,
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this->PixelDiffThreshold),
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inputCellSet,
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primaryOutput,
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secondaryOutput,
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diffArray,
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thresholdOutput);
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}
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else
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{
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VTKM_LOG_S(vtkm::cont::LogLevel::Info, "Diffing image directly");
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this->Invoke(vtkm::worklet::ImageDifference(),
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primaryOutput,
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secondaryOutput,
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diffArray,
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thresholdOutput);
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}
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diffOutput = diffArray;
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};
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this->CastAndCallVecField<4>(primaryField, resolveType);
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vtkm::cont::ArrayHandle<vtkm::FloatDefault> errorPixels;
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vtkm::cont::Algorithm::CopyIf(
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thresholdOutput, thresholdOutput, errorPixels, GreaterThanThreshold(this->PixelDiffThreshold));
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if (errorPixels.GetNumberOfValues() >
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thresholdOutput.GetNumberOfValues() * this->AllowedPixelErrorRatio)
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{
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this->ImageDiffWithinThreshold = false;
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}
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VTKM_LOG_S(vtkm::cont::LogLevel::Info,
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"Difference within threshold: "
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<< this->ImageDiffWithinThreshold
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<< ", for pixels outside threshold: " << errorPixels.GetNumberOfValues()
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<< ", with a total number of pixels: " << thresholdOutput.GetNumberOfValues()
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<< ", and an allowable pixel error ratio: " << this->AllowedPixelErrorRatio
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<< ", with a total summed threshold error: "
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<< vtkm::cont::Algorithm::Reduce(errorPixels, static_cast<FloatDefault>(0)));
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auto outputDataSet = this->CreateResultFieldPoint(input, this->GetOutputFieldName(), diffOutput);
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outputDataSet.AddPointField(this->GetThresholdFieldName(), thresholdOutput);
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return outputDataSet;
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}
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}
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} // namespace filter
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} // namespace vtkm
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