Acrobat Distiller Settings for Images

[Dov Isaacs]

The default for downsampling is "bicubic" which is the same as used by Photoshop
and most of our RIP products. Use it! It is generally much higher quality than
"average."

I have never experimented with the JPEG2000 tile size. I've left it "as is."

It doesn't make a difference going into PostScript whether your images were
PNG, TIFF, JPEG, GIF, etc. That aspect is gone once you've imported the image
into FrameMaker. The "Automatic" setting in the joboptions causes Distiller to
do extensive analysis of each image and chose the compression best suited for
the image type. For example, you wouldn't want JPEG compression of most screen
shots or a rasterized Visio diagram because you would likely get compression
artifacts. You wouldn't want ZIP compression of a photographic image because
you would end up with relatively little compression with not any real noticeable
improvement over a maximum quality JPEG-compressed photographic image.

	- Dov

> -----Original Message-----
> From: jaloren at gmail.com [mailto:jaloren at gmail.com] On Behalf Of Joseph
> Sent: Friday, February 13, 2009 9:45 AM
> To: Dov Isaacs; framers at lists.frameusers.com
> Subject: Re: Acrobat Distiller Settings for Images
> 
> Hi Dov,
> 
> Couple questions for you. Which type of downsampling: bicubic or average? For JPEG200 do you have a
> recommend tile size?
> 
> Lastly, is the fact that I am mostly using PNG graphics that are going to be displayed on the screen
> affect how you would set this up?
> 
> Thanks,
> Joe
> On Fri, Feb 13, 2009 at 11:02 AM, Dov Isaacs <isaacs at adobe.com> wrote:
> Maximum quality Automatic (JPEG) compression with downsampling to 300dpi for images
> over 450dpi should maintain exceptionally high quality for photographic images using
> JPEG compression and ZIP compression for vector-like images (such as screen shots).
> 
> Alternatively, maximum Automatic (JPEG2000) compression will yield similar quality
> at a slightly larger PDF file size.
> 
>        - Dov
> 
> > -----Original Message-----
> > From: framers-bounces at lists.frameusers.com [mailto:framers-bounces at lists.frameusers.com] On Behalf
> Of
> > Joseph
> > Sent: Friday, February 13, 2009 8:57 AM
> > To: framers at lists.frameusers.com
> > Subject: Acrobat Distiller Settings for Images
> >
> > Hi All,
> >
> > When I print a framemaker book, I first save it as a PS file and then use
> > acrobat distiller to transform the PS file into a PDF. I have been fiddling
> > with the Adobe PDF settings for Distiller to see if I can get better quality
> > graphics. However, considering the size of the documents I am pdfing, I need
> > to be careful with PDF file size. For example, removing Image compression
> > transforms a 200 kb pdf into a 1.45 mb.
> >
> > So here's my question: what image and color settings do you use in acrobat
> > distiller in order to get the best quality graphics for the smallest file
> > size?
> >
> > --
> > Sincerely,
> >
> > Joseph Lorenzini
> 
> 
> 
> --
> Sincerely,
> 
> Joseph Lorenzini
> Naperville, IL
> 309-319-4487