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- Newsgroups: comp.sys.amiga.graphics
- Path: sparky!uunet!mcsun!fuug!funic!nntp.hut.fi!judge-dredd.cs.hut.fi!hurlum
- From: hurlum@judge-dredd.cs.hut.fi (Harri Juhani Holopainen)
- Subject: Re: JPEG compressions
- Message-ID: <1993Jan26.101300.14686@nntp.hut.fi>
- Sender: usenet@nntp.hut.fi (Usenet pseudouser id)
- Nntp-Posting-Host: judge-dredd.cs.hut.fi
- Reply-To: hurlum@niksula.hut.fi (Harri Juhani Holopainen)
- Organization: Helsinki University of Technology, Finland
- References: <1993Jan23.093844.27675@etek.chalmers.se> <1993Jan23.164122.22989@crash> <C1F43D.3q7.2@cs.cmu.edu>
- Date: Tue, 26 Jan 1993 10:13:00 GMT
- Lines: 30
-
- In article <C1F43D.3q7.2@cs.cmu.edu> tgl+@cs.cmu.edu (Tom Lane) writes:
- >pflodin@etek.chalmers.se (Per Flodin) writes:
- >> I'd like to keep my pics as intact as possible so I wonder if a rate of 100
- >> (the maximum allowable rate) removes any data or if it just compresses? I
- [...]
- >> think that a JPEG file using compression rate of 100 still would be smaller
- >> than most other formats, or?
- >
- [...]
- >If you are not happy with the image quality at Q 95, you should probably
- >not be using JPEG for your images. As other people have pointed out in
- >this thread, JPEG is not suitable for all types of images; it is intended
- >for photographs and photo-like images (complex raytraces, for instance).
- >For simpler images like cartoons, there are other methods that will give
- >better compression with less computation (good old GIF often works well).
-
- Very true... i snapped my 900*800 wb screen and got a 63k iff file to be used
- as a X-window background pic, but as i couldn't find anything that
- support iff file format :(, i converted it to jpeg with hamlab+...
- and got a 173k file with Q 75.
-
- >
- [..]
- > regards, tom lane
- > organizer, Independent JPEG Group
-
- --
- Harri Holopainen
-
-
-