[comp.graphics] color wash

dwayne@rover.bsd.uchicago.edu (08/18/89)

I desperately need a color wash algorithm.  I need to lay a pet image
(positron emission tomography) on top of an MRI (Magnetic resonance
imaging).  The MRI is grey-scale and the pet has been given pseudo-coloring.
The PET image should seem to be translucent, and the degree of opacity 
should be controllable.  Any algorithm that any one has that will lay one
image on another like this would be greatly appreciated.  If anything
interesting comes up I will post.

Please mail directly to me, if possible.

THANKS in ADVANCE!!!!

Dwayne Spradlin -- Phone: 312-702-6864
dwayne@rover.bsd.uchicago.edu

rick@hanauma (Richard Ottolini) (08/18/89)

A simple color wash algorithm is to reload the color table (if using pseudo
color).  OR the four most significant bits of each of the two images into
eight bits.  Then reload the color table emphasize a particular image.