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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 itkFrameDifferenceVideoFilter_h
#define itkFrameDifferenceVideoFilter_h
#include "itkVideoToVideoFilter.h"
namespace itk
{
/** \class FrameDifferenceVideoFilter
* \brief Compute the squared intensity difference between frame x and frame
* x+n
*
* This filter computes the squared intensity difference between a frame and
* the nth previous frame.
*
* \ingroup ITKVideoFiltering
*/
template<typename TInputVideoStream, typename TOutputVideoStream>
class ITK_TEMPLATE_EXPORT FrameDifferenceVideoFilter :
public VideoToVideoFilter<TInputVideoStream, TOutputVideoStream>
{
public:
/** Standard class typedefs */
typedef TInputVideoStream InputVideoStreamType;
typedef TOutputVideoStream OutputVideoStreamType;
typedef FrameDifferenceVideoFilter< InputVideoStreamType,
OutputVideoStreamType > Self;
typedef VideoToVideoFilter< InputVideoStreamType,
OutputVideoStreamType > Superclass;
typedef SmartPointer< Self > Pointer;
typedef SmartPointer< const Self > ConstPointer;
typedef WeakPointer< const Self > ConstWeakPointer;
typedef typename TInputVideoStream::FrameType InputFrameType;
typedef typename InputFrameType::PixelType InputPixelType;
typedef typename InputFrameType::RegionType InputFrameSpatialRegionType;
typedef typename TOutputVideoStream::FrameType OutputFrameType;
typedef typename OutputFrameType::PixelType OutputPixelType;
typedef typename OutputFrameType::RegionType OutputFrameSpatialRegionType;
itkNewMacro(Self);
itkTypeMacro(FrameDifferenceVideoFilter, VideoToVideoFilter);
/** Get/Set the offset for computing frame differences. Defaults to 1. */
void SetFrameOffset(SizeValueType numFrames);
SizeValueType GetFrameOffset();
protected:
/** Constructor and Destructor */
FrameDifferenceVideoFilter();
virtual ~FrameDifferenceVideoFilter() ITK_OVERRIDE {}
/** PrintSelf */
virtual void PrintSelf(std::ostream & os, Indent indent) const ITK_OVERRIDE;
/** FrameDifferenceVideoFilter is implemented as a temporal streaming and
* spatially multithreaded filter, so we override ThreadedGenerateData */
virtual void ThreadedGenerateData(
const OutputFrameSpatialRegionType& outputRegionForThread,
int threadId) ITK_OVERRIDE;
private:
ITK_DISALLOW_COPY_AND_ASSIGN(FrameDifferenceVideoFilter);
}; // end class FrameDifferenceVideoFilter
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkFrameDifferenceVideoFilter.hxx"
#endif
#endif
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