[ITK-users] Resampler to itk::image

[Dženan Zukić]

Hi Andrea,

what you are missing is resampler->Update();

Regards,
Dženan

On Fri, Dec 1, 2017 at 4:49 AM, AR_univr via Insight-users <
insight-users at itk.org> wrote:

> Hi,
> I'm having problems to convert Resampler Output to itk::Image .
> Here a snippet of what i'm doing :
>
>     const     unsigned int   ImageDimension = 3;
>     typedef   unsigned char  PixelType;
>     typedef   itk::Image< PixelType, ImageDimension > InputImageType;
>     typedef   itk::ResampleImageFilter< InputImageType,     InputImageType
> >  ResamplerType;
>     . . .
>     InputImageType::Pointer inputImage =  . . .
>
>     ResamplerType::Pointer resampler = ResamplerType::New();
>     InterpolatorType::Pointer interpolator = InterpolatorType::New();
>     resampler->SetInterpolator(interpolator);
>     InputImageType::SpacingType spacing = inputImage->GetSpacing();
>     InputImageType::PointType   origin = inputImage->GetOrigin();
>     InputImageType::DirectionType direction = inputImage->GetDirection();
>     InputImageType::RegionType region = inputImage->GetBufferedRegion();
>     InputImageType::SizeType   size = region.GetSize();
>
>     resampler->SetOutputSpacing(spacing);
>     resampler->SetOutputDirection(direction);
>     resampler->SetOutputOrigin(origin);
>     resampler->SetSize(size);
>     resampler->SetTransform(tps);
>
>     resampler->SetOutputStartIndex(region.GetIndex());
>     resampler->SetInput(inputImage);
>
>     std::cout << "[resampler] Written Origin   : " <<
> resampler->GetOutputOrigin()[0] << ", " << resampler->GetOutputOrigin()[1]
> << ", " << resampler->GetOutputOrigin()[2] << std::endl;
>     std::cout << "[resampler] Written Spacing  : " <<
> resampler->GetOutputSpacing()[0] << ", " << resampler->GetOutputSpacing()[
> 1]
> << ", " << resampler->GetOutputSpacing()[2] << std::endl;        std::cout
> << "[resampler] size : " << resampler->GetSize() << std::endl;
>     std::cout << "[resampler] transform : " << resampler->GetTransform() <<
> std::endl;
>     std::cout << "[resampler] num of outs : " <<
> resampler->GetNumberOfOutputs() << std::endl;
>     std::cout << "[resampler] Written Direction: \n" <<
> resampler->GetOutputDirection() << std::endl;
>
>
> Up to here i have the values, and it seems it's working.
> But when i do
>
>    InputImageType::Pointer output = resampler->GetOutput();
>
> output is empty, and i dont know why... Am i missing something?
>
> any help would be appreciated
>
> Thanks !
>
> Andrea
>
>
>
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