[ITK-users] Creating 3D dome using ITK

[Francois Budin]

Hello Sidharta,

Don't forget to move the ellipsoid where you want in space. In the example
that Robert pointed you to [1], it is:

ellipse->SetObjectToParentTransform( transform );

To obtain only haft a dome, you could only create an image that contains
half of your ellipse for "SpatialObjectToImageFilter", and then resize the
image
afterward to match the image size you want.

Hope this helps,
Francois


[1] https://itk.org/Wiki/ITK/Examples/SpatialObjects/EllipseSpatialObject

On Wed, May 10, 2017 at 8:06 AM, sidharta <sidharta.gupta93 at gmail.com>
wrote:

> I tried the EllipseSpatialObject as follows:
>
> int EllipseSpatialObjectToImage(InputImageType::Pointer binaryImage){
>
>         typedef itk::EllipseSpatialObject<Dimension> EllipseType;
>         EllipseType::Pointer ellipse = EllipseType::New();
>
>         ellipse->SetRadius(0.5 / binaryImage->GetSpacing()[0]);
>         ellipse->SetDefaultInsideValue(1.0);
>         ellipse->SetDefaultOutsideValue(0.0);
>
>         typedef itk::SpatialObjectToImageFilter<EllipseType,
> InputImageType>
> SpatialObjectToImageFilterType;
>         SpatialObjectToImageFilterType::Pointer filter =
> SpatialObjectToImageFilterType::New();
>
>         int d = 1.0 / binaryImage->GetSpacing()[0];
>         InputImageType::SizeType size;
>         size.Fill(d);
>         filter->SetSize(size);
>
>         filter->SetInsideValue(255);
>         filter->SetOutsideValue(0);
>
>         double O[3] = { 0, 0, 0 };
>         filter->SetOrigin(O);
>         filter->SetInput(ellipse);
>
>         filter->Update();
>
>         int flag = FileWriter(filter->GetOutput(),
> "C:/Users/api/Desktop/3D_mask_ellipse.mhd");
>         if (!flag)
>                 return EXIT_FAILURE;
>         else
>                 return EXIT_SUCCESS;
> }
> But I get a blank image unfortunately. How would I get hemi-sphere from
> this? Just cropImageFilter?
>
>
> Thank you
> Sidharta
>
>
>
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