/usr/include/ITK-4.5/itkBinaryThresholdImageFunction.h is in libinsighttoolkit4-dev 4.5.0-3.
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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 __itkBinaryThresholdImageFunction_h
#define __itkBinaryThresholdImageFunction_h
#include "itkImageFunction.h"
namespace itk
{
/** \class BinaryThresholdImageFunction
* \brief Returns true is the value of an image lies within a range
* of thresholds
* This ImageFunction returns true (or false) if the pixel value lies
* within (outside) a lower and upper threshold value. The threshold
* range can be set with the ThresholdBelow, ThresholdBetween or
* ThresholdAbove methods. The input image is set via method
* SetInputImage().
*
* Methods Evaluate, EvaluateAtIndex and EvaluateAtContinuousIndex
* respectively evaluate the function at an geometric point, image index
* and continuous image index.
*
* \ingroup ImageFunctions
*
* \ingroup ITKImageFunction
*/
template< typename TInputImage, typename TCoordRep = float >
class BinaryThresholdImageFunction:
public ImageFunction< TInputImage, bool, TCoordRep >
{
public:
/** Standard class typedefs. */
typedef BinaryThresholdImageFunction Self;
typedef ImageFunction< TInputImage, bool, TCoordRep > Superclass;
typedef SmartPointer< Self > Pointer;
typedef SmartPointer< const Self > ConstPointer;
/** Run-time type information (and related methods). */
itkTypeMacro(BinaryThresholdImageFunction, ImageFunction);
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** InputImageType typedef support. */
typedef typename Superclass::InputImageType InputImageType;
/** Typedef to describe the type of pixel. */
typedef typename TInputImage::PixelType PixelType;
/** Dimension underlying input image. */
itkStaticConstMacro(ImageDimension, unsigned int, Superclass::ImageDimension);
/** Point typedef support. */
typedef typename Superclass::PointType PointType;
/** Index typedef support. */
typedef typename Superclass::IndexType IndexType;
/** ContinuousIndex typedef support. */
typedef typename Superclass::ContinuousIndexType ContinuousIndexType;
/** BinaryThreshold the image at a point position
*
* Returns true if the image intensity at the specified point position
* satisfies the threshold criteria. The point is assumed to lie within
* the image buffer.
*
* ImageFunction::IsInsideBuffer() can be used to check bounds before
* calling the method. */
virtual bool Evaluate(const PointType & point) const
{
IndexType index;
this->ConvertPointToNearestIndex(point, index);
return ( this->EvaluateAtIndex(index) );
}
/** BinaryThreshold the image at a continuous index position
*
* Returns true if the image intensity at the specified point position
* satisfies the threshold criteria. The point is assumed to lie within
* the image buffer.
*
* ImageFunction::IsInsideBuffer() can be used to check bounds before
* calling the method. */
virtual bool EvaluateAtContinuousIndex(
const ContinuousIndexType & index) const
{
IndexType nindex;
this->ConvertContinuousIndexToNearestIndex (index, nindex);
return this->EvaluateAtIndex(nindex);
}
/** BinaryThreshold the image at an index position.
*
* Returns true if the image intensity at the specified point position
* satisfies the threshold criteria. The point is assumed to lie within
* the image buffer.
*
* ImageFunction::IsInsideBuffer() can be used to check bounds before
* calling the method. */
virtual bool EvaluateAtIndex(const IndexType & index) const
{
PixelType value = this->GetInputImage()->GetPixel(index);
return ( m_Lower <= value && value <= m_Upper );
}
/** Get the lower threshold value. */
itkGetConstReferenceMacro(Lower, PixelType);
/** Get the upper threshold value. */
itkGetConstReferenceMacro(Upper, PixelType);
/** Values greater than or equal to the value are inside. */
void ThresholdAbove(PixelType thresh);
/** Values less than or equal to the value are inside. */
void ThresholdBelow(PixelType thresh);
/** Values that lie between lower and upper inclusive are inside. */
void ThresholdBetween(PixelType lower, PixelType upper);
protected:
BinaryThresholdImageFunction();
~BinaryThresholdImageFunction(){}
void PrintSelf(std::ostream & os, Indent indent) const;
private:
BinaryThresholdImageFunction(const Self &); //purposely not implemented
void operator=(const Self &); //purposely not implemented
PixelType m_Lower;
PixelType m_Upper;
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkBinaryThresholdImageFunction.hxx"
#endif
#endif
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