[vtkusers] Volume Ray Casting

[Abhishek]

Hello All,

 

I am rendering a CT Volume using the vtkVolumeRayCastCompositeFunction and
vtkVolumeRayCastMapper. I want to map the gray levels of the resulting
projection image such that the minimum corresponds to a black and the
maximum corresponds to a white. Is there an easy way to do it or would I
have to derive from vtkVolumeRayCastMapper and do it through my own class.

 

Another related question: I don't want to render that projected image on
screen instead write it directly to disk or create an image object. I know
that I can take the output of a rendered scene and write it to file but I
don't want the background and other objects to be saved as well. Is there an
efficient and simple way to save only the projected image to disk or
construct an image object out of it? Any pointers will be very helpful.
Thanks,

 

-Cheers,

Abhishek 

 

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