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/*=========================================================================
*
* Copyright NumFOCUS
*
* 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
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* 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 itkTileImageFilter_h
#define itkTileImageFilter_h
#include "itkImageToImageFilter.h"
#include "itkFixedArray.h"
namespace itk
{
/**
* \class TileImageFilter
* \brief Tile multiple input images into a single output image.
*
* This filter will tile multiple images using a user-specified
* layout. The tile sizes will be large enough to accommodate the
* largest image for each tile. The layout is specified with the
* SetLayout method. The layout has the same dimension as the output
* image. If all entries of the layout are positive, the tiled output
* will contain the exact number of tiles. If the layout contains a 0
* in the last dimension, the filter will compute a size that will
* accommodate all of the images. Empty tiles are filled with the
* value specified with the SetDefault value method. The input images
* must have a dimension less than or equal to the output image. The
* output image have a larger dimension than the input images. This
* filter can be used to create a volume from a series of inputs by
* specifying a layout of 1,1,0.
* \ingroup ITKImageGrid
*
* \sphinx
* \sphinxexample{Filtering/ImageGrid/Stack2DImagesInto3DImage,Stack 2D Images Into 3D Image}
* \sphinxexample{Filtering/ImageGrid/TileImagesSideBySide,Tile Images Side By Side}
* \endsphinx
*/
template <typename TInputImage, typename TOutputImage>
class ITK_TEMPLATE_EXPORT TileImageFilter : public ImageToImageFilter<TInputImage, TOutputImage>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(TileImageFilter);
/** Standard Self type alias */
using Self = TileImageFilter;
using Superclass = ImageToImageFilter<TInputImage, TOutputImage>;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(TileImageFilter);
/** Image pixel value type alias. */
using InputPixelType = typename TInputImage::PixelType;
using OutputPixelType = typename TOutputImage::PixelType;
using OutputPixelComponentType = typename NumericTraits<OutputPixelType>::ValueType;
/** Image related type alias. */
using InputImagePointer = typename TInputImage::Pointer;
using OutputImagePointer = typename TOutputImage::Pointer;
using InputSizeType = typename TInputImage::SizeType;
using InputIndexType = typename TInputImage::IndexType;
using InputImageRegionType = typename TInputImage::RegionType;
using OutputSizeType = typename TOutputImage::SizeType;
using OutputIndexType = typename TOutputImage::IndexType;
using OutputImageRegionType = typename TOutputImage::RegionType;
/** Image related type alias. */
static constexpr unsigned int InputImageDimension = TInputImage::ImageDimension;
static constexpr unsigned int OutputImageDimension = TOutputImage::ImageDimension;
/**
* \class TileInfo
* Define a tile structure
* \ingroup ITKImageGrid
*/
class TileInfo
{
public:
int m_ImageNumber{ -1 };
OutputImageRegionType m_Region;
TileInfo() = default;
};
using TileImageType = Image<TileInfo, Self::OutputImageDimension>;
/** LayoutArray type. */
using LayoutArrayType = FixedArray<unsigned int, Self::OutputImageDimension>;
/** Set/Get the layout of the tiles. If the last Layout value is 0,
* the filter will compute a value that will accommodate all of the
* images. */
itkSetMacro(Layout, LayoutArrayType);
itkGetConstMacro(Layout, LayoutArrayType);
/** Set the pixel value for locations that are not covered by an
* input image. The default default pixel value is Zero. */
itkSetMacro(DefaultPixelValue, OutputPixelType);
/** Get the pixel value for locations that are not covered by an
* input image. */
itkGetConstMacro(DefaultPixelValue, OutputPixelType);
#ifdef ITK_USE_CONCEPT_CHECKING
// Begin concept checking
itkConceptMacro(OutputEqualityComparableCheck, (Concept::EqualityComparable<OutputPixelType>));
itkConceptMacro(SameTypeCheck, (Concept::SameType<InputPixelType, OutputPixelType>));
itkConceptMacro(OutputOStreamWritableCheck, (Concept::OStreamWritable<OutputPixelType>));
// End concept checking
#endif
protected:
TileImageFilter();
~TileImageFilter() override = default;
void
PrintSelf(std::ostream & os, Indent indent) const override;
void
GenerateInputRequestedRegion() override;
void
GenerateOutputInformation() override;
void
GenerateData() override;
/** Override VerifyInputInformation() since this filter's inputs do
* not need to occupy the same physical space.
*
* \sa ProcessObject::VerifyInputInformation
*/
void
VerifyInputInformation() ITKv5_CONST override;
private:
typename TileImageType::Pointer m_TileImage{};
OutputPixelType m_DefaultPixelValue{};
LayoutArrayType m_Layout{};
}; // end of class
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkTileImageFilter.hxx"
#endif
#endif
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