[Insight-users] Copy Image Region to a Larger Image

[Luis Ibanez]

Hi Sabine

It looks like what you need is the

     itk::PasteImageFilter
http://public.kitware.com/Insight/Doxygen/html/classitk_1_1PasteImageFilter.html


Unless you are not just copying a region, but
also applying a geometrical transformation
such as rotation or scaling.


Please let us know,


     Thanks


          Luis


--------------------------------------------------------
On Wed, Feb 25, 2009 at 11:09 AM, slorentz <professor_rumsdiegeige at yahoo.com
> wrote:

>
> Hello!
>
> I try to do the following:I have two images. The first one is called
> "ResultImage", and the second one is called "ImageToAdd". I want to add
> everything of "ImageToAdd" that is not visible in the first frame to
> "ResultImage". So, first I compute the registration parameters:
>
> // compute optimal registration parameters
> registration->SetFixedImage(  ResultImage );
> registration->SetMovingImage( ImageToAdd );
> registration->SetInitialTransformParameters( initialParameters );
> registration->Update();
>
> ParametersType finalParameters =
> registration->GetLastTransformParameters();
>
>
>
> Then I'd like to copy the new part of the image "ImageToAdd" in order to
> have "ResultImage" + the new part of "ImageToAdd"... I tried this:
>
> ImageType::SizeType S =
> (ResultImage->GetLargestPossibleRegion()).GetSize();
> ImageType::PointType O = ResultImage->GetOrigin(); //O[0] -= 40;
> resampler->SetSize( size );
> resampler->SetInput( Y );
> resampler->SetTransform( registration->GetOutput()->Get() );
> resampler->SetOutputOrigin( O );
> resampler->SetOutputSpacing( ResultImage->GetSpacing() );
> resampler->SetDefaultPixelValue( 50 );
>
> // this should be the new, stitched image
> ImageType::Pointer Z = resampler->GetOutput();
>
> // write the result to a file
> typedef itk::ImageFileWriter< ImageType > WriterType;
> WriterType::Pointer wt = WriterType::New();
> wt->SetFileName("test.bmp");
> wt->SetInput( Z );
> wt->Update();
>
>
> but it doesn't really work.... Is the way to use the resampling filter
> correct at all?
>
>
> Regards,
> Sabine Lorentz
>
>
>
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