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/*========================================================================= |
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Program: Insight Segmentation & Registration Toolkit |
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Module: $RCSfile: itkPixelAccessor.h.html,v $ |
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Language: C++ |
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Date: $Date: 2006/01/17 19:15:43 $ |
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Version: $Revision: 1.4 $ |
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Copyright (c) Insight Software Consortium. All rights reserved. |
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See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details. |
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This software is distributed WITHOUT ANY WARRANTY; without even |
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR |
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PURPOSE. See the above copyright notices for more information. |
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=========================================================================*/ |
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#ifndef __itkPixelAccessor_h |
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#define __itkPixelAccessor_h |
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#include "itkMacro.h" |
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namespace itk |
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{ |
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/** \class PixelAccessor |
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* \brief Give access to partial aspects of a type |
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* |
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* PixelAccessor is templated over an internal type and an |
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* external type representation. This class encapsulates a |
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* customized convertion between the internal and external |
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* type representations. |
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* |
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* PixelAccessor is designed to be used in conjuntion with |
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* ImageAdaptors. An ImageAdaptor take an image and present it |
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* as another image in which the pixels are a pixel-to-pixel |
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* modification of the original image. |
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* |
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* ImageAdaptors are intended to perform task similar to ImageFilters, |
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* but reducing the overhead in memory allocation, at the price of some |
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* reduction in performance. |
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* |
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* ImageAdaptors are templated over a PixelAccessor class that |
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* will define what kind of transformation is applied to the |
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* pixel data. Typical uses of PixelAccessor include basic type |
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* casting, (e.g. make a float image looks like a unsigned int image). |
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* |
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* Every Image has a default PixelAccessor that performs an identity |
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* operation. ImageIterators use the PixelAccessor defined by the image |
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* in order to get and set the values of pixels. |
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* |
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* \ingroup ImageAdaptors |
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*/ |
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template <class TInternalType, class TExternalType > |
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class ITK_EXPORT PixelAccessor |
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{ |
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public: |
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/** External typedef. It defines the external aspect |
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* that this class will exhibit. */ |
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typedef TExternalType ExternalType; |
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/** Internal typedef. It defines the internal real |
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* representation of data. */ |
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typedef TInternalType InternalType; |
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inline void Set(TInternalType & output, const TExternalType & input) const |
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{output = (TInternalType) input;} |
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inline TExternalType Get( const TInternalType & input ) const |
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{return (TExternalType)input;} |
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}; |
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} // end namespace itk |
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#endif |
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EOF |
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