ITK  5.0.0
Insight Segmentation and Registration Toolkit
WikiExamples/IO/ImportImageFilter.cxx
#include "itkImage.h"
int main(int, char * [])
{
using PixelType = unsigned char;
constexpr unsigned int Dimension = 3;
ImportFilterType::Pointer importFilter = ImportFilterType::New();
size[0] = 200; // size along X
size[1] = 200; // size along Y
size[2] = 200; // size along Z
start.Fill( 0 );
region.SetIndex( start );
region.SetSize( size );
importFilter->SetRegion( region );
double origin[ Dimension ];
origin[0] = 0.0; // X coordinate
origin[1] = 0.0; // Y coordinate
origin[2] = 0.0; // Z coordinate
importFilter->SetOrigin( origin );
double spacing[ Dimension ];
spacing[0] = 1.0; // along X direction
spacing[1] = 1.0; // along Y direction
spacing[2] = 1.0; // along Z direction
importFilter->SetSpacing( spacing );
const unsigned int numberOfPixels = size[0] * size[1] * size[2];
auto * localBuffer = new PixelType[ numberOfPixels ];
constexpr double radius = 80.0;
const double radius2 = radius * radius;
PixelType * it = localBuffer;
for(unsigned int z=0; z < size[2]; z++)
{
const double dz = static_cast<double>( z ) - static_cast<double>(size[2])/2.0;
for(unsigned int y=0; y < size[1]; y++)
{
const double dy = static_cast<double>( y ) - static_cast<double>(size[1])/2.0;
for(unsigned int x=0; x < size[0]; x++)
{
const double dx = static_cast<double>( x ) - static_cast<double>(size[0])/2.0;
const double d2 = dx*dx + dy*dy + dz*dz;
*it++ = ( d2 < radius2 ) ? 255 : 0;
}
}
}
const bool importImageFilterWillOwnTheBuffer = true;
importFilter->SetImportPointer( localBuffer, numberOfPixels,
importImageFilterWillOwnTheBuffer );
WriterType::Pointer writer = WriterType::New();
writer->SetFileName("test.png");
writer->SetInput( importFilter->GetOutput() );
writer->Update();
return EXIT_SUCCESS;
}