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/*=========================================================================
Program: ORFEO Toolbox
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) Centre National d'Etudes Spatiales. All rights reserved.
See OTBCopyright.txt for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#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);
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 ITK_OVERRIDE;
protected:
GridResampleImageFilter();
/** Destructor */
~GridResampleImageFilter() ITK_OVERRIDE {};
void GenerateOutputInformation() ITK_OVERRIDE;
void GenerateInputRequestedRegion() ITK_OVERRIDE;
void BeforeThreadedGenerateData() ITK_OVERRIDE;
void ThreadedGenerateData(const OutputImageRegionType& outputRegionForThread, itk::ThreadIdType threadId) ITK_OVERRIDE;
void AfterThreadedGenerateData() ITK_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 ITK_OVERRIDE;
private:
GridResampleImageFilter(const Self &); //purposely not implemented
void operator =(const Self&); //purposely not implemented
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
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.txx"
#endif
#endif
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