|
|
| Line 1: |
Line 1: |
| ==BSplineScatteredDataPointSetToImageFilter.cxx==
| | {{warning|1=The media wiki content on this page is no longer maintained. The examples presented on the https://itk.org/Wiki/* pages likely require ITK version 4.13 or earlier releases. In many cases, the examples on this page no longer conform to the best practices for modern ITK versions.}} |
| <source lang="cpp">
| |
| #include "itkBSplineScatteredDataPointSetToImageFilter.h"
| |
| #include "itkPointSet.h"
| |
| #include "itkImage.h"
| |
| #include "itkVectorImage.h"
| |
| #include "itkImageFileWriter.h"
| |
| | |
| int main (void)
| |
| { | |
| const unsigned int ParametricDimension = 1;
| |
| const unsigned int DataDimension = 2;
| |
| | |
| typedef itk::Vector< float, DataDimension > DataType;
| |
| | |
| typedef itk::PointSet< DataType, ParametricDimension > PointSetType;
| |
| | |
| PointSetType::Pointer pointSet = PointSetType::New();
| |
| | |
| PointSetType::PointType param0, param1, param2;
| |
| | |
| param0[0] = 0.0;
| |
| DataType p0;
| |
| p0[0] = 10.0; p0[1]= 10.0;
| |
| | |
| pointSet->SetPoint(0, param0);
| |
| pointSet->SetPointData( 0, p0 );
| |
| | |
| param1[0] = 1.0;
| |
| DataType p1;
| |
| p1[0] = 80.0; p1[1]= 50.0;
| |
| pointSet->SetPoint(1, param1);
| |
| pointSet->SetPointData( 1, p1 );
| |
| | |
| param2[0] = 2.0;
| |
| DataType p2;
| |
| p2[0] = 180.0; p2[1]= 180.0;
| |
| pointSet->SetPoint(2, param2);
| |
| pointSet->SetPointData( 2, p2 );
| |
| | |
| typedef itk::Image<DataType, ParametricDimension> ImageType;
| |
| typedef itk::BSplineScatteredDataPointSetToImageFilter < PointSetType, ImageType > SplineFilterType;
| |
| SplineFilterType::Pointer splineFilter = SplineFilterType::New();
| |
| | |
| int splineorder=2; // complexity of the spline
| |
| | |
| SplineFilterType::ArrayType ncontrol;
| |
| ncontrol[0]=splineorder + 1;
| |
| SplineFilterType::ArrayType closedim;
| |
| closedim[0]= 0;
| |
| | |
| ImageType::PointType parametricDomainOrigin;
| |
| parametricDomainOrigin[0] = 0.0;
| |
| | |
| ImageType::SpacingType parametricDomainSpacing;
| |
| parametricDomainSpacing[0] = 0.0001; // this determines the sampling of the continuous B-spline object.
| |
| | |
| ImageType::SizeType parametricDomainSize;
| |
| parametricDomainSize[0] = 2.0 / parametricDomainSpacing[0] + 1;
| |
| splineFilter->SetGenerateOutputImage( true ); // the only reason to turn this off is if one only wants to use the control point lattice for further processing | |
| splineFilter->SetInput ( pointSet );
| |
| splineFilter->SetSplineOrder ( splineorder );
| |
| splineFilter->SetNumberOfControlPoints ( ncontrol );
| |
| splineFilter->SetNumberOfLevels( 3 );
| |
| splineFilter->SetCloseDimension ( closedim );
| |
| splineFilter->SetSize( parametricDomainSize );
| |
| splineFilter->SetSpacing( parametricDomainSpacing );
| |
| splineFilter->SetOrigin( parametricDomainOrigin );
| |
| splineFilter->Update();
| |
| | |
| // The output will consist of a 1-D image where each voxel contains the
| |
| // (x,y,z) locations of the points
| |
| typedef itk::Image<unsigned char, 2> OutputImageType;
| |
| OutputImageType::Pointer outputImage = OutputImageType::New();
| |
| OutputImageType::SizeType size;
| |
| size.Fill(200);
| |
| | |
| OutputImageType::IndexType start;
| |
| start.Fill(0);
| |
| | |
| OutputImageType::RegionType region(start, size);
| |
| outputImage->SetRegions(region);
| |
| outputImage->Allocate();
| |
| outputImage->FillBuffer(0);
| |
| | |
| for(unsigned int i = 0; i < splineFilter->GetOutput()->GetLargestPossibleRegion().GetSize()[0]; ++i)
| |
| {
| |
| ImageType::IndexType splineIndex;
| |
| splineIndex[0] = i;
| |
| | |
| DataType outputPixel = splineFilter->GetOutput()->GetPixel(splineIndex);
| |
| | |
| OutputImageType::IndexType index;
| |
| index[0] = outputPixel[0];
| |
| index[1] = outputPixel[1];
| |
| | |
| outputImage->SetPixel(index, 255 );
| |
| }
| |
| | |
| typedef itk::ImageFileWriter< OutputImageType > WriterType;
| |
| WriterType::Pointer writer = WriterType::New();
| |
| writer->SetFileName("spline.png");
| |
| writer->SetInput(outputImage);
| |
| writer->Update();
| |
| | |
| return EXIT_SUCCESS;
| |
| };
| |
| </source>
| |
| | |
| {{ITKCMakeLists|{{SUBPAGENAME}}}}
| |
