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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 itkNoiseBaseImageFilter_h
#define itkNoiseBaseImageFilter_h
#include "itkInPlaceImageFilter.h"
#if !defined( ITK_LEGACY_FUTURE_REMOVE )
# include <vcl_ctime.h>
#endif
#include <ctime>
namespace itk
{
/** \class NoiseBaseImageFilter
*
* \brief An Abstract Base class for Noise image filters
*
* This class add common methods for setting a seed for the random
* generators used to generate the noise.
*
* \sa InPlaceImageFilter
* \ingroup ITKImageNoise
*/
template <class TInputImage, class TOutputImage=TInputImage>
class ITK_TEMPLATE_EXPORT NoiseBaseImageFilter :
public InPlaceImageFilter<TInputImage,TOutputImage >
{
public:
/** Standard class typedefs. */
typedef NoiseBaseImageFilter Self;
typedef InPlaceImageFilter<TInputImage,TOutputImage > Superclass;
typedef SmartPointer<Self> Pointer;
typedef SmartPointer<const Self> ConstPointer;
typedef typename Superclass::OutputImagePixelType OutputImagePixelType;
/** Run-time type information (and related methods). */
itkTypeMacro(NoiseBaseImageFilter, InPlaceImageFilter);
/** Set/Get the seed for random initialization */
itkGetConstMacro(Seed, uint32_t);
itkSetMacro(Seed, uint32_t);
/** Set the seed to a value initialized with the current time and
* process clock. */
virtual void SetSeed();
protected:
NoiseBaseImageFilter();
virtual ~NoiseBaseImageFilter() ITK_OVERRIDE = 0;
void PrintSelf(std::ostream & os, Indent indent) const ITK_OVERRIDE;
inline static uint32_t Hash(uint32_t a, uint32_t b)
{
// Knuth's Multiplicative Method for hashing
return (a+b)*2654435761u;
}
// Clamp and round the input value to the output
static OutputImagePixelType ClampCast(const double &value);
private:
ITK_DISALLOW_COPY_AND_ASSIGN(NoiseBaseImageFilter);
uint32_t m_Seed;
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkNoiseBaseImageFilter.hxx"
#endif
#endif
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