Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!rpi!crdgw1!sixhub!davidsen
From: davidsen@sixhub.UUCP (Wm E. Davidsen Jr)
Newsgroups: comp.binaries.ibm.pc.d
Subject: Re: gifs compressable?
Message-ID: <3096@sixhub.UUCP>
Date: 7 Feb 91 03:44:49 GMT
References: <4bffFVW00XYKI3J0UA@andrew.cmu.edu>
Reply-To: davidsen@sixhub.UUCP (bill davidsen)
Organization: *IX Public Access UNIX, Schenectady NY
Lines: 19

In article <4bffFVW00XYKI3J0UA@andrew.cmu.edu> hp0p+@andrew.cmu.edu (Hokkun Pang) writes:
| i came across this strange result a while ago.

| >lharc    pic.bmp  =>  241K     84%

| so, thru conversion and compression, the gif file reduced to 84% of original.
| i also obtained similar results for other gifs and pkzip. so, what is being
| compressed here?

  No, the gif file doesn't seem to have been compressed, the bitmap file
does. GIF files are already compressed, while a bitmap isn't. This
allows the compressors, like zip or arc, to work on the raw data.

  The new alt.comp.compression may carry discussions of stuff like this.
-- 
bill davidsen - davidsen@sixhub.uucp (uunet!crdgw1!sixhub!davidsen)
    sysop *IX BBS and Public Access UNIX
    moderator of comp.binaries.ibm.pc and 80386 mailing list
"Stupidity, like virtue, is its own reward" -me