home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!elroy.jpl.nasa.gov!nntp-server.caltech.edu!andrey
- From: andrey@cco.caltech.edu (Andre T. Yew)
- Newsgroups: comp.sys.amiga.graphics
- Subject: Re: Banding Still Imminent in AGA 256,000 color mode!
- Date: 18 Dec 1992 08:31:30 GMT
- Organization: California Institute of Technology, Pasadena
- Lines: 27
- Message-ID: <1gs292INN22u@gap.caltech.edu>
- References: <1992Dec17.144504.9669@ac.dal.ca> <1gqs1iINNmoe@gap.caltech.edu> <1992Dec17.224553.6665@gn.ecn.purdue.edu> <jjn2bj+@rpi.edu>
- NNTP-Posting-Host: punisher.caltech.edu
-
- pooler@aix02.ecs.rpi.edu (Robert Peter Poole) writes:
-
- >Computer graphics relies (generally) on a linear color scheme. That is, the
- >intensity of the Red, Green, and Blue guns is (supposedly) linearly related
- >to the RGB values stored in video memory. The human eye is like the human
- >ear -- it's a logarithmic device. The human eye can distinguish very fine
- >differences in intensity at low light levels, but cannot generally distinguish
- >two subtly different bright colors of the same hue. I'm actually surprised
- >that computer manufacturers and engineers haven't tried to create a system
- >that used some kind of exponential correlation. I guess this would create
- >some nasty compatibility problems with existing computer systems. Oh well,
- >that's standardization for you.
-
- Well, that's what gamma correction is for. But banding shows
- up in my renderings even at very high intesities.
-
- >Really, anything beyond 24 bits is a waste of hardware. Even with 24 bits,
- >you're wasting most of those bits (kind of).
-
- I think I disagree with this. What if I need more than 256
- shades of some hue? What if the precision of our rendering software
- is much, much higher than 8-bits and we need that precision?
-
- --Andre
-
- --
- Andre Yew andrey@cco.caltech.edu (131.215.139.2)
-