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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.
*
*=========================================================================*/
#ifndef itkGaussianRandomSpatialNeighborSubsampler_hxx
#define itkGaussianRandomSpatialNeighborSubsampler_hxx
namespace itk
{
namespace Statistics
{
template <typename TSample, typename TRegion>
GaussianRandomSpatialNeighborSubsampler<TSample, TRegion>::GaussianRandomSpatialNeighborSubsampler()
{
m_Variance = DefaultVariance;
}
template <typename TSample, typename TRegion>
typename LightObject::Pointer
GaussianRandomSpatialNeighborSubsampler<TSample, TRegion>::InternalClone() const
{
typename LightObject::Pointer loPtr = Superclass::InternalClone();
typename Self::Pointer rval = dynamic_cast<Self *>(loPtr.GetPointer());
if (rval.IsNull())
{
itkExceptionMacro("downcast to type " << this->GetNameOfClass() << " failed.");
}
rval->m_Variance = this->m_Variance;
return loPtr;
}
template <typename TSample, typename TRegion>
auto
GaussianRandomSpatialNeighborSubsampler<TSample, TRegion>::GetIntegerVariate(RandomIntType lowerBound,
RandomIntType upperBound,
RandomIntType mean) -> RandomIntType
{
if (upperBound < lowerBound)
{
itkExceptionMacro("upperBound (" << upperBound << ") not >= to lowerBound(" << lowerBound << ')');
}
RandomIntType randInt = 0;
do
{
RealType randVar = this->m_RandomNumberGenerator->GetNormalVariate(mean, m_Variance);
randInt = static_cast<RandomIntType>(std::floor(randVar));
} while ((randInt < lowerBound) || (randInt > upperBound));
return randInt;
}
template <typename TSample, typename TRegion>
void
GaussianRandomSpatialNeighborSubsampler<TSample, TRegion>::PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "Gaussian variance: " << m_Variance << std::endl;
os << std::endl;
}
} // end namespace Statistics
} // end namespace itk
#endif
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