Stephan- Based on the fact that your printed copy looks correct, I still think it might be a display issue. A quick and easy way to check it would be to create a test document containing multiple instances of the same image, each at a different size (either by specifying a scaling factor, or by specifying hard dimensional constraints (like pt or cm)). I'd bet (if I were a gambling man) that all of the printed results are going to look good, while your on-screen representations are going to be a crap shoot.
Is the purpose of your project to create PDFs that are going to be primarily viewed on-screen, or on hard copy? And if possible, could you send me a copy of the offending PDF, and the image itself? (In a separate e-mail directly to my address; you'll probably get scolded if you post potentially large attachments to the group.) -Jeff "Stephan Wiesner" <[EMAIL PROTECTED] To: <[EMAIL PROTECTED]> iesner.de> cc: Subject: RE: Quality of Grafics 11/15/2002 12:36 PM Please respond to fop-user Hi Jef and thanks for the fast reply. The printout looks fine. It is printed with 100%, though, so that was to be expected. I use the current Acrobat Reader to view my files and I have commercial Documents, with graphics that look great no matter how large I scale, so it can not really be the viewer? Stephan > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] > Sent: Freitag, 15. November 2002 18:19 > To: [EMAIL PROTECTED] > Subject: Re: Quality of Grafics > > > > 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 > > > >