Re: world coordinates do not give the correct dicom coordinate

Hello,

Would you mind posting your question to https://discourse.vtk.org?
Community support for VTK is transitioning to that forum, and you are more
likely to get an answer there.

Thanks,
Cory

On Mon, Mar 11, 2019 at 9:48 AM zandarina <[email protected]> wrote:

> Dear all,
>
> I want to do segmentation with itk and i would like to select a seed using
> vtk with the mouse. I get the coordinates in world coordinates
>
>                         int x = this->Interactor->GetEventPosition()[0];
>                         int y = this->Interactor->GetEventPosition()[1];
>                         std::cout << "(x,y) = (" << x << "," << y << ")"
> << std::endl;
>
>                         seeds[0] = x;
>                         seeds[1] = y;
>
> but when i want to use it as a seed for itk i see it is the wrong place. I
> tried the transformphysicalpointoindex but the result is even worst
>
>                 bool isInside =
>
> extractFilter->GetOutput()->TransformPhysicalPointToIndex(coordinate_vtk,
> coordinate_itk);
>                 if (isInside) {
>
>
>                         ImageType::PixelType pixelValue =
> extractFilter->GetOutput()->GetPixel(coordinate_itk);
>                 }
>
> Any help about the coordinates in vtk?
>
> Thanks
>
>
>
>
>
> --
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-- 
Cory Quammen
Staff R&D Engineer
Kitware, Inc.

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