[vtkusers] How to render separate objects in different colors

[Bill Lorensen]

Jake,

vtkDiscreteMarchingCubes will extract one or more labeled structures from a
vtk image.

http://www.vtk.org/doc/nightly/html/classvtkDiscreteMarchingCubes.html

There is a short example of usage in:

http://public.kitware.com/cgi-bin/viewcvs.cgi/*checkout*/Graphics/Testing/Tcl/TestDiscreteMarchingCubes.tcl?root=VTK&content-type=text/plain

Bill

On Nov 28, 2007 1:11 AM, Jake Nickel <jake.nickel at gmail.com> wrote:

> Hi All,
>
> I have an Analyze image that is segmented into different objects in the
> following manner:  All voxels associated with object 1 are assigned value =
> 1, voxels associated with object 2 are assigned value = 2, etc.  (Background
> voxel values = 0)
>
> I would like to visualize the entire data set and have a single object
> stand out by rendering it with a different color than the rest of the
> objects.  For example, I would like object 1 to be red and objects 2 and up
> to be white (black background).
>
> The data set is large enough to where volume rendering performance is very
> slow, so I have been surface rendering instead.  I am able to read the image
> in using ITK and get the voxel values.  In order to render the surface, I've
> used the itkImageToVTKImageFilter to convert the image to VTK.
>
> Is there a special filter that would be good for doing this?  Or does
> anyone have any insight as to how I should approach this?
>
> Thanks in advance for any help!
> -Jake
>
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