NAME
vtkExtractVOI - select piece (e.g., volume of interest) and/or subsample structured points dataset
SYNOPSIS
#include "/opt/vtk-c++/graphics/vtkExtractVOI.h"
class VTK_EXPORT vtkExtractVOI : public vtkStructuredPointsToStructuredPointsFilter
vtkExtractVOI();
static vtkExtractVOI *New() {return new vtkExtractVOI;};
const char *GetClassName() {return "vtkExtractVOI";};
void PrintSelf(ostream& os, vtkIndent indent);
void SetVOI(int data[6]);
void SetVOI(int *);
int *GetVOI();
void GetVOI(int data[6]);
void SetVOI(int imin, int imax, int jmin, int jmax, int kmin, int kmax);
void SetSampleRate( int, int, int);
void SetSampleRate( int *);
int *GetSampleRate();
void GetSampleRate( int data[ 3]);
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 toas 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.
SEE ALSO
vtkGeometryFilter vtkExtractGeometry vtkExtractGrid
SUMMARY
void SetVOI(int data[6])
void SetVOI(int *)
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).
void SetSampleRate( int, int, int)
void SetSampleRate( int *)
Set the sampling rate in the i, j, and k directisons. 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.
vtkExtractVOI()
Construct object to extract all of the input data.