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/*=========================================================================
Program: Visualization Toolkit
Module: $RCSfile: vtkExtractVOI.h,v $
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/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 notice for more information.
=========================================================================*/
// .NAME vtkExtractVOI - select piece (e.g., volume of interest) and/or subsample structured points dataset
// .SECTION Description
// vtkExtractVOI is a filter that selects a portion of an input structured
// points dataset, or subsamples an input dataset. (The selected portion of
// interested is referred to as the Volume Of Interest, or VOI.) The output of
// this filter is a structured points dataset. The filter treats input data
// of any topological dimension (i.e., point, line, image, or volume) and can
// generate output data of any topological dimension.
//
// To use this filter set the VOI ivar which are i-j-k min/max indices that
// specify a rectangular region in the data. (Note that these are 0-offset.)
// You can also specify a sampling rate to subsample the data.
//
// Typical applications of this filter are to extract a slice from a volume
// for image processing, subsampling large volumes to reduce data size, or
// extracting regions of a volume with interesting data.
// .SECTION See Also
// vtkGeometryFilter vtkExtractGeometry vtkExtractGrid
#ifndef __vtkExtractVOI_h
#define __vtkExtractVOI_h
#include "vtkImageAlgorithm.h"
class VTK_IMAGING_EXPORT vtkExtractVOI : public vtkImageAlgorithm
{
public:
vtkTypeRevisionMacro(vtkExtractVOI,vtkImageAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Construct object to extract all of the input data.
static vtkExtractVOI *New();
// Description:
// Specify i-j-k (min,max) pairs to extract. The resulting structured points
// dataset can be of any topological dimension (i.e., point, line, image,
// or volume).
vtkSetVector6Macro(VOI,int);
vtkGetVectorMacro(VOI,int,6);
// Description:
// Set the sampling rate in the i, j, and k directions. If the rate is >
// 1, then the resulting VOI will be subsampled representation of the
// input. For example, if the SampleRate=(2,2,2), every other point will
// be selected, resulting in a volume 1/8th the original size.
vtkSetVector3Macro(SampleRate, int);
vtkGetVectorMacro(SampleRate, int, 3);
protected:
vtkExtractVOI();
~vtkExtractVOI() {};
virtual int RequestUpdateExtent(vtkInformation*,
vtkInformationVector**,
vtkInformationVector*);
virtual int RequestInformation (vtkInformation*,
vtkInformationVector**,
vtkInformationVector*);
virtual int RequestData(vtkInformation* request,
vtkInformationVector** inputVector,
vtkInformationVector* outputVector);
int VOI[6];
int SampleRate[3];
private:
vtkExtractVOI(const vtkExtractVOI&); // Not implemented.
void operator=(const vtkExtractVOI&); // Not implemented.
};
#endif
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