[vtkusers] Setting VOI in a circular manner

[Hayden Smith]

Hello,
     Thank you very much. I have been able to cut a circular portion from the image and construct a polydata using your suggestion. Now suppose I have set two circular ROIs one inside another in a cylindrical manner and I only want to visualize the cylindrical portion, could any one suggest me how that can be done. 
    Or is there any method available in VTK about cutting out a cylindrical portion from the center of an object.
 
Thank in advance.
 
Regards,
Hayden.
From: David Gobbi <david.gobbi at gmail.com>
To: Hayden Smith <s_hayden_28 at yahoo.com> 
Cc: "vtkusers at vtk.org" <vtkusers at vtk.org> 
Sent: Sunday, April 21, 2013 10:13 AM
Subject: Re: [vtkusers] Setting VOI in a circular manner


Hi Hayden,

The vtkROIStencilSource can generate a circular ROI for an image that
some of the other image filters can use, e.g. vtkImageStencil can
black out all pixels that are outside of the ROI.

- David

On Sun, Apr 21, 2013 at 8:58 AM, Hayden Smith <s_hayden_28 at yahoo.com> wrote:
> Dear VTK users,
>        I would like to know while using vtkImageReader, is it  possible to
> set VOI in a circular manner from the center of image? Current
> implementation shows setting of VOI in a rectangle.
>
> Thanks and regards,
> Hayden.
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