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/*=========================================================================
*
* Copyright UMC Utrecht and contributors
*
* 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 elxRandomSamplerSparseMask_h
#define elxRandomSamplerSparseMask_h
#include "elxIncludes.h" // include first to avoid MSVS warning
#include "itkImageRandomSamplerSparseMask.h"
namespace elastix
{
/**
* \class RandomSamplerSparseMask
* \brief An interpolator based on the itk::ImageRandomSamplerSparseMask.
*
* This image sampler randomly samples 'NumberOfSamples' voxels in
* the InputImageRegion. Voxels may be selected multiple times.
* If a mask is given, the sampler tries to find samples within the
* mask. If the mask is very sparse, this image sampler is a better
* choice than the random sampler.
*
* \todo Write something similar for the RandomCoordinate sampler.
*
* This sampler is suitable to used in combination with the
* NewSamplesEveryIteration parameter (defined in the elx::OptimizerBase).
*
* The parameters used in this class are:
* \parameter ImageSampler: Select this image sampler as follows:\n
* <tt>(ImageSampler "RandomSparseMask")</tt>
* \parameter NumberOfSpatialSamples: The number of image voxels used for computing the
* metric value and its derivative in each iteration. Must be given for each resolution.\n
* example: <tt>(NumberOfSpatialSamples 2048 2048 4000)</tt> \n
* The default is 5000.
*
* \ingroup ImageSamplers
*/
template <class TElastix>
class ITK_TEMPLATE_EXPORT RandomSamplerSparseMask
: public itk::ImageRandomSamplerSparseMask<typename elx::ImageSamplerBase<TElastix>::InputImageType>
, public elx::ImageSamplerBase<TElastix>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(RandomSamplerSparseMask);
/** Standard ITK-stuff. */
using Self = RandomSamplerSparseMask;
using Superclass1 = itk::ImageRandomSamplerSparseMask<typename elx::ImageSamplerBase<TElastix>::InputImageType>;
using Superclass2 = elx::ImageSamplerBase<TElastix>;
using Pointer = itk::SmartPointer<Self>;
using ConstPointer = itk::SmartPointer<const Self>;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Run-time type information (and related methods). */
itkTypeMacro(RandomSamplerSparseMask, itk::ImageRandomSamplerSparseMask);
/** Name of this class.
* Use this name in the parameter file to select this specific interpolator. \n
* example: <tt>(ImageSampler "RandomSparseMask")</tt>\n
*/
elxClassNameMacro("RandomSparseMask");
/** Typedefs inherited from the superclass. */
using typename Superclass1::DataObjectPointer;
using typename Superclass1::OutputVectorContainerType;
using typename Superclass1::OutputVectorContainerPointer;
using typename Superclass1::InputImageType;
using typename Superclass1::InputImagePointer;
using typename Superclass1::InputImageConstPointer;
using typename Superclass1::InputImageRegionType;
using typename Superclass1::InputImagePixelType;
using typename Superclass1::ImageSampleType;
using typename Superclass1::ImageSampleContainerType;
using typename Superclass1::MaskType;
using typename Superclass1::InputImageIndexType;
using typename Superclass1::InputImagePointType;
/** The input image dimension. */
itkStaticConstMacro(InputImageDimension, unsigned int, Superclass1::InputImageDimension);
/** Typedefs inherited from Elastix. */
using typename Superclass2::ElastixType;
using typename Superclass2::RegistrationType;
using ITKBaseType = typename Superclass2::ITKBaseType;
/** Execute stuff before each resolution:
* \li Set the number of samples.
*/
void
BeforeEachResolution() override;
protected:
/** The constructor. */
RandomSamplerSparseMask() = default;
/** The destructor. */
~RandomSamplerSparseMask() override = default;
private:
elxOverrideGetSelfMacro;
};
} // end namespace elastix
#ifndef ITK_MANUAL_INSTANTIATION
# include "elxRandomSamplerSparseMask.hxx"
#endif
#endif // end #ifndef elxRandomSamplerSparseMask_h
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