RE: [xep-support] JPG compression?

From: Peter Drivas (peter.drivas@gexinc.com)
Date: Mon Feb 24 2003 - 14:16:10 PST

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    Thanks. We definitely are using 300 dpi images. I'm going to try rendering
    with versions 2.7 and 3.2.1 for comparison. I'm also going to try PNG
    images.

    Peter

    > -----Original Message-----
    > From: owner-xep-support@www.renderx.com
    > [mailto:owner-xep-support@www.renderx.com]On Behalf Of Clay Leeds
    > Sent: Monday, February 24, 2003 4:26 PM
    > To: xep-support@renderx.com
    > Subject: Re: [xep-support] JPG compression?
    >
    >
    > Clay Leeds wrote:
    > > Nikolai Grigoriev wrote:
    > >
    > >> JPEG is generally not the best format for line art containing
    > >> sharp edges - it tends to create transition effects ("JPEG artifacts").
    > >> Edge fuzziness is inherent for the type of compression used in JPEG;
    > >> there's nothing to do. You may consider other, non-lossy formats
    > >> instead. For example, PNG is equally efficient with XEP: unless
    > >> there are some special features like gamma, interlacing, or alpha
    > >> channel,
    > >> the data are copied transparently from the input file to the resulting
    > >> PDF, generating no overhead even for big images.
    > >>
    > >> Best regards,
    > >> Nikolai Grigoriev
    > >> RenderX
    > >
    > > I had some problems with "fuzziness" with my JPG images. Then I
    > realized
    > > that I was printing at +300dpi, and the JPG had a 72dpi resolution. I
    > > changed my JPG to 300dpi, and much of the fuzziness went away. That
    > > said, TIFF or PNG might improve the clarity, although SVG might be even
    > > better (I think SVG is supported by XEP?).
    >
    > I should add, that I had to convert my original vector/EPS drawing to
    > 300dpi. Starting from a 72dpi and moving to 300dpi shrinks the size of
    > your image by 50% or more (garbage in, garbage out ;-). I had to start
    > with a larger version of my logo, then convert to 300dpi. I hope this is
    > relevant to the discussion and helps!
    >
    > Web Maestro Clay
    > --
    > Clay Leeds - cleeds@medata.com
    > Web Developer - Medata, Inc. - http://www.medata.com
    > PGP Public Key: https://mail.medata.com/pgp/cleeds.asc
    >
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