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- Newsgroups: comp.compression
- Path: sparky!uunet!spool.mu.edu!agate!ames!decwrl!decwrl!netcomsv!netcom.com!mccarty
- From: mccarty@netcom.com (Michael K McCarty)
- Subject: Re: bitmap compression
- Message-ID: <1992Nov6.092342.25648@netcom.com>
- Organization: Netcom - Online Communication Services (408 241-9760 guest)
- References: <Bx9C19.4r2@ccu.umanitoba.ca>
- Date: Fri, 6 Nov 1992 09:23:42 GMT
- Lines: 23
-
- umfehr06@ccu.umanitoba.ca (John Fehr) writes:
-
- >I'm currently looking for compression algorithms to compress weather charts.
- >These charts contain about 95% white pixels, and 5% black pixels. I've
- >already thought of using GIF, but the files only shrink down to ~100k.
- >(Originally ~1meg uncompressed.) I've also thought of using arithmetic
- >coding. Does anyone have any suggestions as to other compression methods?
- > Thanx for your help,
- > John
- Why don't you store the offsets of the black pixels? That should bring
- it to under 100k.
-
- >--
- >-----------------------------------------------------
- >- John Fehr - DoD#505 -
- >- umfehr06@ccu.umanitoba.ca - GPz550 -
- >- umfehr06@silver.cs.umanitoba.ca - A3000 kicks! -
- --
- <=-----------------------------------------------------------------------=>
- Michael K McCarty Internet: mccarty@netcom.com
- mccarty@dhvx20.csudh.edu
- "...close the hatch. Careful not to lock it on the way out."
- -Buzz Aldrin :: Apollo 11
-