Re: when to size images

["Dov Isaacs" <isaacs@xxxxxxxxx>]

Bob,

I would recommend NEVER resampling the base image, regardless of
the ultimate print or display resolution, at least for the PDF and
PostScript workflows we have been describing. Why? Because Photoshop
(or any similar program) will not do any better a job of resampling
than you will get at display time (Acrobat / Acrobat Reader) or at
print time via Adobe PostScript Level 2 or Adobe PostScript 3 on
a high resolution device, assuming that you have that image interpolation
option "on". So why carry all that extraneous data along with your
images, PostScript, and/or PDF? To make matters worse, if you upsample
up front and then need to let Acrobat / Acrobat Reader or a printer
downsample later, you will indeed likely suffer image quality loss.

The only place where resampling to get final image size/resolution
fit is at all necessary is for generation of web pages with HTML
workflows.

        - Dov


At 5/25/2001 06:06 PM, Bob Kern wrote:
>Dov,
>
>A week or so ago you posted to the Framers list a brilliant summary of
>what to do to get max resolution screen captures. But, you mentioned
>nothing about when to size the images or what is the best tool to use.
>
>Most of us routinely have to resize to fit an image to a particular
>dimension as defined by a book specification, page size, column size,
>etc...  IF we know what our final sizes are, is it better to do this in
>Photoshop and then to adjust the image dpi setting to 300 and then save
>as EPS, or is it better to leave it alone and then scale it to size when
>we get it into Framemaker?  Perhaps if there is extra data or not enough
>data this answer changes (ie, 96dpi 2"x3" image being enlarged to 5"
>line width might have different 'best course of action' then a 600 dpi
>8.5x11 scan that needs to fit in the same 5" line width)?
>
>Thanks for your thoughts on how the above would change your "authorized
>Adobe" best course of action.  This info is very much appreciated, as
>I'm doing a 4-color art-intensive book that is crushing my system (it
>generates a 1.5 gig postscript file when I print to Distiller)
>
>Cheers!
>
>-bob
>--
>Robert Kern


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