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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.
*
*=========================================================================*/
/*=========================================================================
*
* Portions of this file are subject to the VTK Toolkit Version 3 copyright.
*
* Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
*
* For complete copyright, license and disclaimer of warranty information
* please refer to the NOTICE file at the top of the ITK source tree.
*
*=========================================================================*/
#ifndef itkRandomImageSource_h
#define itkRandomImageSource_h
#include "itkImageSource.h"
#include "itkNumericTraits.h"
namespace itk
{
/**
* \class RandomImageSource
* \brief Generate an n-dimensional image of random pixel values.
*
* RandomImageSource generates an image of random pixel values.
* This filter uses an inline random number generator since the library
* drand48, although thread-safe, is very slow in a threaded environment.
* The output image may be of any dimension.
* NOTE: To produce deterministic results, set the number of threads
* to 1.
*
* \ingroup DataSources MultiThreaded
* \ingroup ITKTestKernel
*
* \sphinx
* \sphinxexample{Core/TestKernel/GenerateRandomImage,Generate Random Image}
* \endsphinx
*/
template <typename TOutputImage>
class ITK_TEMPLATE_EXPORT RandomImageSource : public ImageSource<TOutputImage>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(RandomImageSource);
/** Standard class type aliases. */
using Self = RandomImageSource;
using Superclass = ImageSource<TOutputImage>;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** Typedef for the output image PixelType. */
using OutputImagePixelType = typename TOutputImage::PixelType;
/** Typedef to describe the output image region type. */
using OutputImageRegionType = typename TOutputImage::RegionType;
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(RandomImageSource);
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Basic types from the OutputImageType */
using SizeType = typename TOutputImage::SizeType;
using IndexType = typename TOutputImage::IndexType;
using SpacingType = typename TOutputImage::SpacingType;
using DirectionType = typename TOutputImage::DirectionType;
using PointType = typename TOutputImage::PointType;
using SizeValueType = typename SizeType::SizeValueType;
using SizeValueArrayType = SizeValueType[TOutputImage::ImageDimension];
using SpacingValueType = typename TOutputImage::SpacingValueType;
using SpacingValueArrayType = SpacingValueType[TOutputImage::ImageDimension];
using PointValueType = typename TOutputImage::PointValueType;
using PointValueArrayType = PointValueType[TOutputImage::ImageDimension];
/** ImageDimension constant */
static constexpr unsigned int OutputImageDimension = TOutputImage::ImageDimension;
/** Set/Get size of the output image */
itkSetMacro(Size, SizeType);
virtual void
SetSize(SizeValueArrayType sizeArray);
virtual const SizeValueType *
GetSize() const;
/** Set/Get spacing of the output image */
itkSetMacro(Spacing, SpacingType);
virtual void
SetSpacing(SpacingValueArrayType spacingArray);
virtual const SpacingValueType *
GetSpacing() const;
/** Set/Get origin of the output image */
itkSetMacro(Origin, PointType);
virtual void
SetOrigin(PointValueArrayType originArray);
virtual const PointValueType *
GetOrigin() const;
itkSetMacro(Direction, DirectionType);
itkGetMacro(Direction, DirectionType);
/** Set the minimum possible pixel value. By default, it is
* NumericTraits<TOutputImage::PixelType>::min(). */
itkSetClampMacro(Min,
OutputImagePixelType,
NumericTraits<OutputImagePixelType>::NonpositiveMin(),
NumericTraits<OutputImagePixelType>::max());
/** Get the minimum possible pixel value. */
itkGetConstMacro(Min, OutputImagePixelType);
/** Set the maximum possible pixel value. By default, it is
* NumericTraits<TOutputImage::PixelType>::max(). */
itkSetClampMacro(Max,
OutputImagePixelType,
NumericTraits<OutputImagePixelType>::NonpositiveMin(),
NumericTraits<OutputImagePixelType>::max());
/** Get the maximum possible pixel value. */
itkGetConstMacro(Max, OutputImagePixelType);
protected:
RandomImageSource();
~RandomImageSource() override = default;
void
PrintSelf(std::ostream & os, Indent indent) const override;
void
DynamicThreadedGenerateData(const OutputImageRegionType & outputRegionForThread) override;
void
GenerateOutputInformation() override;
private:
SizeType m_Size{}; // size of the output image
SpacingType m_Spacing{}; // spacing
PointType m_Origin{}; // origin
DirectionType m_Direction{}; // direction
typename TOutputImage::PixelType m_Min{}; // minimum possible value
typename TOutputImage::PixelType m_Max{}; // maximum possible value
// The following variables are deprecated, and provided here just for
// backward compatibility. It use is discouraged.
mutable PointValueArrayType m_OriginArray{};
mutable SpacingValueArrayType m_SpacingArray{};
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkRandomImageSource.hxx"
#endif
#endif
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