Stephan- Are you noticing degraded image quality in a printed version of the PDF, or only in an on-screen display? If it's in the on-screen display, I would attribute the degradation to the way the PDF Viewer handles scaling of images. Rather than using a nice, blurred scaling algorithm, I believe the PDF Viewer uses a quick and dirty single-sample scaling algorithm, which can lead to distortion of the images, especially when viewed at odd factoring sizes like 66% or 75%.
If it's in a printed PDF, then I have no explanation, although I'd like to
see an example. I've implemented a system using FOP, which embeds hi
resolution JPEGS into a PDF, and the printed output looks good, while the
on-screen output can sometimes be a little grainy. It's not terribly
noticeable on my images, since they're photographs, and don't generally
have hard edges, which tend to show scaling shortcuts more than soft
gradients.
Hope that helps.
-Jeff
"Stephan Wiesner"
<[EMAIL PROTECTED] To: <[EMAIL PROTECTED]>
iesner.de> cc:
Subject: Quality of Grafics
11/15/2002 12:03
PM
Please respond to
fop-user
Hi list,
Is there a way to improve the quality of graphics?
I played around with high quality pictures and the better the quality,
the bigger the resulting PDF (which makes sense), but the image looks
good only with 100% view, which I hardly ever use. At all other sizes it
gets quite ugly, no matter what I try.
Is there a switch, like with the Acrobat Writer, for optimation?
Stephan
