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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* 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.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 itkFlipImageFilter_h
#define itkFlipImageFilter_h
#include "itkImageToImageFilter.h"
#include "itkFixedArray.h"
namespace itk
{
/** \class FlipImageFilter
* \brief Flips an image across user specified axes.
*
* FlipImageFilter flips an image across user specified axes.
* The flip axes are set via method SetFlipAxes( array ) where
* the input is a FixedArray<bool,ImageDimension>. The image
* is flipped across axes for which array[i] is true.
*
* In terms of grid coordinates the image is flipped within
* the LargestPossibleRegion of the input image. As such,
* the LargestPossibleRegion of the output image is the same
* as the input.
*
* In terms of geometric coordinates, the output origin
* is such that the image is flipped with respect to the
* coordinate axes.
*
* \ingroup GeometricTransform
* \ingroup MultiThreaded
* \ingroup Streamed
* \ingroup ITKImageGrid
*
* \wiki
* \wikiexample{Images/FlipImageFilter,Flip an image over specified axes}
* \endwiki
*/
template< typename TImage >
class ITK_TEMPLATE_EXPORT FlipImageFilter:
public ImageToImageFilter< TImage, TImage >
{
public:
/** Standard class typedefs. */
typedef FlipImageFilter Self;
typedef ImageToImageFilter< TImage, TImage > Superclass;
typedef SmartPointer< Self > Pointer;
typedef SmartPointer< const Self > ConstPointer;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Run-time type information (and related methods). */
itkTypeMacro(FlipImageFilter, ImageToImageFilter);
/** ImageDimension enumeration */
itkStaticConstMacro(ImageDimension, unsigned int, TImage::ImageDimension);
/** Inherited types */
typedef typename Superclass::InputImagePointer InputImagePointer;
typedef typename Superclass::InputImageConstPointer InputImageConstPointer;
typedef typename Superclass::OutputImagePointer OutputImagePointer;
typedef typename Superclass::OutputImageRegionType OutputImageRegionType;
/** Index related types */
typedef typename TImage::IndexType IndexType;
typedef typename IndexType::IndexValueType IndexValueType;
/** FlipAxesArray type */
typedef FixedArray< bool, itkGetStaticConstMacro(ImageDimension) > FlipAxesArrayType;
/** Set/Get the axis to be flipped. The image is flipped along axes
* for which array[i] is true. Default is false. */
itkSetMacro(FlipAxes, FlipAxesArrayType);
itkGetConstMacro(FlipAxes, FlipAxesArrayType);
/** Controls how the output origin is computed. If FlipAboutOrigin is
* "On", the flip will occur about the origin of the axis, otherwise,
* the flip will occur about the center of the axis. Default is "On". */
itkBooleanMacro(FlipAboutOrigin);
itkGetConstMacro(FlipAboutOrigin, bool);
itkSetMacro(FlipAboutOrigin, bool);
/** FlipImageFilter produces an image with different origin and
* direction than the input image. As such, FlipImageFilter needs to
* provide an implementation for GenerateOutputInformation() in
* order to inform the pipeline execution model.
* The output image meta information is obtained by permuting the input
* image meta information. The original documentation of this method is
* below.
* \sa ProcessObject::GenerateOutputInformaton() */
virtual void GenerateOutputInformation() ITK_OVERRIDE;
/** FlipImageFilter needs different input requested region than the output
* requested region. As such, FlipImageFilter needs to provide an
* implementation for GenerateInputRequestedRegion() in order to inform the
* pipeline execution model.
* The required input requested region is obtained by permuting the index and
* size of the output requested region.
* \sa ProcessObject::GenerateInputRequestedRegion() */
virtual void GenerateInputRequestedRegion() ITK_OVERRIDE;
protected:
FlipImageFilter();
~FlipImageFilter() ITK_OVERRIDE {}
void PrintSelf(std::ostream & os, Indent indent) const ITK_OVERRIDE;
/** FlipImageFilter can be implemented as a multithreaded filter.
* Therefore, this implementation provides a ThreadedGenerateData() routine
* which is called for each processing thread. The output image data is
* allocated automatically by the superclass prior to calling
* ThreadedGenerateData(). ThreadedGenerateData can only write to the
* portion of the output image specified by the parameter
* "outputRegionForThread"
*
* \sa ImageToImageFilter::ThreadedGenerateData(),
* ImageToImageFilter::GenerateData() */
void ThreadedGenerateData(const OutputImageRegionType & outputRegionForThread,
ThreadIdType threadId) ITK_OVERRIDE;
private:
ITK_DISALLOW_COPY_AND_ASSIGN(FlipImageFilter);
FlipAxesArrayType m_FlipAxes;
bool m_FlipAboutOrigin;
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkFlipImageFilter.hxx"
#endif
#endif
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