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- From: ko_mike@jhunix.hcf.jhu.edu (Michael Y Ko)
- Newsgroups: comp.graphics
- Subject: JPEG and VGA planes
- Date: 24 Jan 1993 01:00:27 -0500
- Organization: Homewood Academic Computing, Johns Hopkins University, Baltimore, Md, USA
- Lines: 19
- Message-ID: <1jtb9rINNd2b@jhunix.hcf.jhu.edu>
- NNTP-Posting-Host: jhunix.hcf.jhu.edu
-
-
- What are the maximum and normal number of colors for a JPEG graphic?
- I know usually the GIF run up to 256.
-
- Also, has anyone ever heard of a program that is allows manipulation of the
- vga graphic planes to have more than 256 colors at once?
-
- For example, of the four planes, make three of the planes carry colors
- of different intensities. This allows, three planes of 64 levels of colors
- each. Because, these planes are switched back and forth, it would appear
- that a level of 64, would only be 1/3 or 1/4 of that brightness. So
- to have the brightest red, you would need 64 for all three (or four) planes.
- Therefore, you would be able to divide the levels of color intensities
- even greater than 64 up to 64*3 or 192. So, you could ineffect have
- not 262144 different colors, but 192*192*192 or over 7 million with three
- planes. With four planes, (64*4)*(64*4)*(64*4) or over 16 million. (Sounds
- like 24bit graphics...)
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