[vtkusers] How to read raw 24 bit images

[Dimitris Agrafiotis]

Dear all

I want to read the full color images of the visible human dataset 
(raw RGB 24 BIT NON INTERLEAVED)using vtk. Does somebody know a Tcl 
script that would do that for me? How can I convert the images from rgb
to grayscale?

Thanks in advance

Dimitris