-
1. Re: image archiving in a PDF
CtDave Jan 17, 2010 5:28 PM (in response to imagex ideas)Some configuration of Acrobat preferences will help.
Edit > Preferences > select Category: "Convert to PDF".
In the center column ("Converting To PDF"), scroll down and select "TIFF".
Click the "Edit Settings" button.
Configure the Compression pane's values.
(You may find these useful - Monochrome to CCITT G4, Grayscale to ZIP, Color to ZIP.)
Configure the Color Management pane's values.
(You may find using a value of "Off" for all may be useful.)
Also -
Open Distiller. Access the settings edit dialog.
Create a job option that has the "Images" "folder" configured in a manner that meets your needs.
You may want to try:
Color Images
--| Downsample: Off
--| Compression: Zip
Grayscale Images
--| Downsample: Off
--| Compression: Zip
Monochrome Images
--| Downsample: Off
--| Compression: CCITT Group 4
Anti-alias to grey: Off
If you want to use the archival PDF format (PDF/A) and if you've not used it much before then take some time to review what Acrobat Help has to say.
After that, give it a try.
Be well... -
2. Re: image archiving in a PDF
imagex ideas Jan 17, 2010 7:33 PM (in response to CtDave)Thanks for this very quick and helpful reply to my posting. One follow-up if I may. You suggest ZIP compression as the lossless choice for color and grayscale images. JPEG2000 is also available in a lossless option, and standard JPEG with maximal quality is virtually lossless and artifact-free. Is your preference for ZIP over either of these two motivated by archival durability or by typical file size reduction without loss?
-
3. Re: image archiving in a PDF
CtDave Jan 18, 2010 1:13 PM (in response to imagex ideas)Yes,
JPEG 2000 lossless is certainly "good-to-go".
Anything "JPEG" *will* result in some destructive removal of pixels.
For your needs, this may not be an issue.
Why ZIP?
Periodically, I provide specific document collections, as PDF, to a federal regulatory agency.
They in turn submit to NARA.
The "how-to" for what is acceptable was provided pre-JPEG 2000.
Although JPEG 2000 is now ok to use for these submittals, I prefer to leave the compression variable in my workflow alone.
For your purposes you may find JPEG 2000 to your preference.
As you are decidely interested in archival aspects I would suggest a close study of PDF/A and its flavors.
Being an ISO standard, PDF/A will go the distance for establishing your PDFs as archival documents.
I not be too concerned with any individual file size.
Banking the PDFs to a server, WORM, archival grade OSM (CD/DVD), or a combination thereof provides adequate "real estate".
Be well...



