🚀 go-pugleaf

In <1992Jul21.222632.10078@colorado.edu> devin@gandalf.colorado.edu (Sonja Orlavski) writes:
>In article <12334@ecs.soton.ac.uk>, mrd@ecs.soton.ac.uk (Mark Dobie) writes:
>|> 
>|> Even with 24 bit colour, lookup tables between the frame store and
>|> output are useful for previewing changes to an image. You can
>|> interactively fiddle with colour, brightness, contrast etc and when
>|> you are satisfied remap the image through the lookup tables back onto
>|> the frame store. This is much easier (and faster) than changing the
>|> actual image data all the time.

>Really?  How would you implement something like this?  I'd really like to
>be able to do so.

You need hardware lookup tables. I think its quite a common feature on
many frame stores. The boards we have map 8 bit values to a RGB triplet
and the image data is passed through these lookup tables (in real time)
before being displayed. We use three boards together to get a 24 bit
system.

				Mark.
-- 
Mark Dobie                              M.R.Dobie@uk.ac.soton.ecs (JANET)
University of Southampton		M.R.Dobie@ecs.soton.ac.uk (The World)