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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkScalarToRGBPixelFunctor.h,v $
Language: C++
Date: $Date: 2006-02-06 22:01:58 $
Version: $Revision: 1.5 $
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef __itkScalarToRGBPixelFunctor_h
#define __itkScalarToRGBPixelFunctor_h
#include "itkRGBPixel.h"
namespace itk {
namespace Functor {
/**
* \class ScalarToRGBPixelFunctor
* \brief Function object which maps a scalar value into an RGB pixel value.
*
* This class is useful for visualizing labeled images which cannot be mapped
* succefully into grayscale images. Images of unsigned long integers, for
* example may have too many graylevels to visualize effectively.
*
* The hashing scheme used is designed to spread close scalar values very
* different colors by using the least significant bits (fastest changing) of
* the scalar type to determine the color. Because labeled images may
* typically use sequential values, it is desirable that those values result
* in easily discernable colors.
*
*/
template< class TScalar >
class ITK_EXPORT ScalarToRGBPixelFunctor
{
public:
ScalarToRGBPixelFunctor();
~ScalarToRGBPixelFunctor() {};
typedef unsigned char RGBComponentType;
typedef RGBPixel<RGBComponentType> RGBPixelType;
typedef TScalar ScalarType;
RGBPixelType operator()( const TScalar &) const;
void SetLittleEndian()
{
m_IsBigEndian = false;
}
void SetBigEndian()
{
m_IsBigEndian = true;
}
private:
bool m_IsBigEndian;
::size_t m_Index[3];
};
} // end namespace functor
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkScalarToRGBPixelFunctor.txx"
#endif
#endif
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