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Re: Blurred display of images in PDFs created from EPS on Mac OS X [message #42433 is a reply to message #42304] Fri, 04 February 2005 07:36 Go to previous messageGo to previous message
jm is currently offline  jm
Messages: 32
Registered: April 2003
Member
Ben,

The code is not the problem; it's an OSX quirk. Image smoothing seems
to be built-in to Aqua.
There's nothing wrong with the PDFs produced by OSX apps (other than
being a bit bloated
compared to Adobe distilled PDFs). In fact, in this example screen
grab:

http://www.iesd.dmu.ac.uk/~jm/pickup/grab.gif

the EPS was converted to PDF using the Preview application - which
shows it here mushy.
The false colour map (byte-scaled array) is displayed (written to the
Postscript device)
using TV just like any other image. It just happens to have small
pixel dimensions.

The mushy lower image is what the PDF looks like in Keynote also. The
upper is how it
should look (displayed here in Acrobat). Frustratingly, if you hold
down the mouse
whilst resizing in Keynote the image looks OK... until you let go of
the mouse button
and the smoothing mushes up the image again. PDFs created by Keynote
are fine (just as
they are with Preview). But it rules out using native Keynote for a
presentation - which is
a pity (unless I can turn the smoothing off).

Niggles aside, the transition from Solaris to OSX has been a joy. The
only application I miss
having is Framemaker.

Regards,

-John Mardaljevic
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