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/*
* Copyright (C) 2005-2020 Centre National d'Etudes Spatiales (CNES)
*
* This file is part of Orfeo Toolbox
*
* https://www.orfeo-toolbox.org/
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef otbGridResampleImageFilter_h
#define otbGridResampleImageFilter_h
#include "itkImageToImageFilter.h"
#include "itkLinearInterpolateImageFunction.h"
#include "itkDefaultConvertPixelTraits.h"
#include "otbMacro.h"
namespace otb
{
/** \class GridResampleImageFilter
* \brief Resample input image on a new origin/spacing/size grid
*
* This filter resample the input image on a new grid defined by
* OutputOrigin, OutputSpacing and OutputSize, using the provided
* interpolator.
*
* This is equivalent to a itk::ResampleImageFilter using an
* itk::IdentityTransform, except that it is slightly more efficient
* and that in this simplified case it is possible to explicitly
* compute the input requested region. The GridResampleImageFilter
* therefore supports streaming, contrary to the
* itk::ResampleImageFilter.
*
* When grid position is outside of the input image domain, the
* default EdgePaddingValue is used.
*
* If CheckOutputBounds flag is set to true (default value), the
* interpolated value will be checked for output pixel type range
* prior to casting.
*
* \ingroup OTBImageManipulation
* \ingroup Streamed
* \ingroup Threaded
**/
template <typename TInputImage, typename TOutputImage, typename TInterpolatorPrecision = double>
class ITK_EXPORT GridResampleImageFilter : public itk::ImageToImageFilter<TInputImage, TOutputImage>
{
public:
/** Standard class typedefs. */
typedef GridResampleImageFilter Self;
typedef itk::ImageToImageFilter<TInputImage, TOutputImage> Superclass;
typedef itk::SmartPointer<Self> Pointer;
typedef itk::SmartPointer<const Self> ConstPointer;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Run-time type information (and related methods). */
itkTypeMacro(GridResampleImageFilter, itk::ImageToImageFilter);
/** Number of dimensions. */
itkStaticConstMacro(ImageDimension, unsigned int, TOutputImage::ImageDimension);
itkStaticConstMacro(InputImageDimension, unsigned int, TInputImage::ImageDimension);
/** Typedef parameters*/
typedef TInputImage InputImageType;
typedef TOutputImage OutputImageType;
typedef typename OutputImageType::RegionType OutputImageRegionType;
typedef typename TOutputImage::PixelType OutputPixelType;
typedef itk::DefaultConvertPixelTraits<OutputPixelType> OutputPixelConvertType;
typedef typename OutputPixelConvertType::ComponentType OutputPixelComponentType;
/** Interpolator type */
typedef itk::InterpolateImageFunction<InputImageType, TInterpolatorPrecision> InterpolatorType;
typedef typename InterpolatorType::Pointer InterpolatorPointerType;
typedef itk::LinearInterpolateImageFunction<InputImageType, TInterpolatorPrecision> DefaultInterpolatorType;
typedef typename InterpolatorType::OutputType InterpolatorOutputType;
typedef itk::DefaultConvertPixelTraits<InterpolatorOutputType> InterpolatorConvertType;
typedef typename InterpolatorConvertType::ComponentType InterpolatorComponentType;
/** Input pixel continuous index typdef */
typedef typename itk::ContinuousIndex<double, InputImageDimension> ContinuousInputIndexType;
/** ImageBase typedef */
typedef itk::ImageBase<OutputImageType::ImageDimension> ImageBaseType;
typedef typename ImageBaseType::SpacingType SpacingType;
typedef typename ImageBaseType::SizeType SizeType;
typedef typename ImageBaseType::PointType PointType;
typedef typename ImageBaseType::IndexType IndexType;
itkSetMacro(OutputStartIndex, IndexType);
itkGetConstReferenceMacro(OutputStartIndex, IndexType);
itkSetMacro(OutputSize, SizeType);
itkGetConstReferenceMacro(OutputSize, SizeType);
itkSetMacro(OutputOrigin, PointType);
itkGetConstReferenceMacro(OutputOrigin, PointType);
itkSetMacro(OutputSpacing, SpacingType);
itkGetConstReferenceMacro(OutputSpacing, SpacingType);
itkSetMacro(EdgePaddingValue, OutputPixelType);
itkGetConstReferenceMacro(EdgePaddingValue, OutputPixelType);
itkSetMacro(CheckOutputBounds, bool);
itkGetMacro(CheckOutputBounds, bool);
itkBooleanMacro(CheckOutputBounds);
itkSetMacro(InterpolationMargin, double);
itkGetMacro(InterpolationMargin, double);
itkSetObjectMacro(Interpolator, InterpolatorType);
itkGetObjectMacro(Interpolator, InterpolatorType);
/** Import output parameters from a given image */
void SetOutputParametersFromImage(const ImageBaseType* image);
/** Method Compute the Modified Time based on changed to the components. */
itk::ModifiedTimeType GetMTime(void) const override;
protected:
GridResampleImageFilter();
/** Destructor */
~GridResampleImageFilter() override{};
void GenerateOutputInformation() override;
void GenerateInputRequestedRegion() override;
void BeforeThreadedGenerateData() override;
void ThreadedGenerateData(const OutputImageRegionType& outputRegionForThread, itk::ThreadIdType threadId) override;
void AfterThreadedGenerateData() override;
inline void CastPixelWithBoundsChecking(const InterpolatorOutputType& value, const InterpolatorComponentType& minComponent,
const InterpolatorComponentType& maxComponent, OutputPixelType& outputValue) const
{
// Method imported from itk::ResampleImageFilter
const unsigned int nComponents = InterpolatorConvertType::GetNumberOfComponents(value);
itk::NumericTraits<OutputPixelType>::SetLength(outputValue, nComponents);
for (unsigned int n = 0; n < nComponents; n++)
{
InterpolatorComponentType component = InterpolatorConvertType::GetNthComponent(n, value);
if (m_CheckOutputBounds && component < minComponent)
{
OutputPixelConvertType::SetNthComponent(n, outputValue, static_cast<OutputPixelComponentType>(minComponent));
}
else if (m_CheckOutputBounds && component > maxComponent)
{
OutputPixelConvertType::SetNthComponent(n, outputValue, static_cast<OutputPixelComponentType>(maxComponent));
}
else
{
OutputPixelConvertType::SetNthComponent(n, outputValue, static_cast<OutputPixelComponentType>(component));
}
}
}
void PrintSelf(std::ostream& os, itk::Indent indent) const override;
private:
GridResampleImageFilter(const Self&) = delete;
void operator=(const Self&) = delete;
IndexType m_OutputStartIndex; // output image start index
SizeType m_OutputSize; // output image size
PointType m_OutputOrigin; // output image origin
SpacingType m_OutputSpacing; // output image spacing
OutputPixelType m_EdgePaddingValue; // Default pixel value
double m_InterpolationMargin;
bool m_CheckOutputBounds; // Shall we check
// output bounds when
// casting?
InterpolatorPointerType m_Interpolator; // Interpolator used
// for resampling
OutputImageRegionType m_ReachableOutputRegion; // Internal
// variable for
// speed-up. Computed
// in BeforeThreadedGenerateData
};
} // namespace otb
#ifndef OTB_MANUAL_INSTANTIATION
#include "otbGridResampleImageFilter.hxx"
#endif
#endif
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