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- Path: soap.news.pipex.net!pipex!usenet
- From: m.hendry@dial.pipex.com (Mathew Hendry)
- Newsgroups: comp.sys.amiga.graphics
- Subject: Re: help with jpegging
- Date: Tue, 19 Mar 96 22:42:39
- Organization: Private node.
- Distribution: world
- Message-ID: <19960319.53FEE8.14708@al077.du.pipex.com>
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-
- Steve Yee (yeeware@gwis.com) wrote:
- : I have a scanned photo that's 3.7M. I want to use it in Photoshop on my
- : Amiga emulted MAC (I use Shapeshifter).
- :
- : The original is around 3x5. The final size I want in Photoshop is 1.5x2.5.
- :
- : I'm using IMFX 1.52.
- :
- : I cropped the photo,then halfed it,then saved as jpeg (90% compression).
- : Is this the correct way?
-
- Yes. A "quality factor" of 90 is a bit excessive for scanned photographs,
- though. Somewhere around 75 should be sufficient, unless, of course, the
- difference in apparent quality is annoying.
-
- Repeated JPEG compression/decompression will almost always lose you
- information (it certainly will in your case). So JPEG is best used for
- storing completed work, with lossless methods such as PNG or IFF24 being
- used for intermediate storage.
-
- -- Mat.
-