You may not see a difference but I only use jpeg when I need compression,
for the web. For manipulating I use bitmap or tiff, so I have as much
information as possible to start with. This is especially important when
using curves or levels in Photoshop to ensure smooth tones/avoid
posterisation.
Julie
-----Original Message-----
From: Henry Richardson [mailto:itai46@hotmail.com]
Sent: 05 February 2001 14:51
To: filmscanners@halftone.co.uk
Subject: Re: filmscanners: Re: Scanning problems
>From: "Cooke, Julie" <CookeJ@logica.com>
>
>I've just had my 6x7 trannies scanned by a lab specialising in digital.
>
>I explained that jpeg was a lossy compression, that information had been
>lost when converting to jpeg and it was no good to me. He looked at me as
>if
>I was mad and said that he uses jpeg for all his customers to get more
>images on the CD.
Whether you can see any difference between this particular JPEG and a TIFF
or not I would definitely not go back to this lab. For a lab that
specializes in digital not even to know that JPEG is a lossy format and
needed you to explain it to them tells me that they don't really know much
about digital. Since this is such a basic piece of information it seems
extremely likely that they don't know other important things.
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