[ITK-users] Streamed Read/Write Truncating Data
Maryana
nexnaru at gmail.com
Mon Sep 21 14:54:37 EDT 2015
Hi ITK Users/Devs,
I'm new to ITK and I need to write a small program to convert Nifti images
to MetaIO. However, I need to use the streamed reader/writer because my
image volumes can have several gigabytes. I was doing some tests with the
following code but I've realized that whenever I use the stream I end up
with a truncated volume. I'm using ITK 4.8. I'm sure my volume is of
unsigned char type. Also, when I comment out the
writer->SetNumberOfStreamDivisions(20); line I works fine. Does anyone
knows what is wrong?
Thank you!
#include <cstdlib>
#include <string>
#include <iostream>
#include "itkImage.h"
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkImageRegionIterator.h"
#include "itkNiftiImageIO.h"
#include "itkMetaImageIO.h"
int main(int argc, char const *argv[]){
std::string fileIn = "brain_8bit.nii";
std::string fileOut = "mri2_stream.mha";
typedef itk::Image<unsigned char,3> Image3D;
//Reader
typedef itk::ImageFileReader<Image3D> ReaderType;
ReaderType::Pointer reader = ReaderType::New();
reader->SetFileName(fileIn);
//Writer
typedef itk::ImageFileWriter<Image3D> WriterType;
WriterType::Pointer writer = WriterType::New();
writer->SetFileName(fileOut);
writer->SetNumberOfStreamDivisions(20);
writer->SetInput(reader->GetOutput());
std::cout << "Input: " << fileIn << std::endl;
std::cout << "Output: " << fileOut << std::endl;
std::cout << "Writing..." << std::endl;
try
{
writer->Update();
}
catch( itk::ExceptionObject & err )
{
std::cerr << "ExceptionObject caught !" << std::endl;
std::cerr << err << std::endl;
return EXIT_FAILURE;
}
std::cout << "Finished." << std::endl;
return EXIT_SUCCESS;
}
--
"Tudo no mundo começou com um sim. Uma molécula disse sim a outra molécula
e nasceu a vida" - Clarice Lispector
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