Message-Id: <mailto:199505051436.JAA16980@library.wustl.edu> Date: Fri, 5 May 1995 07:06:05 PDT From: Kevin Donovan <mailto:kdonovan@SWCP.COM> Subject: Scanning resolution To: Multiple recipients of list IMAGELIB
I'd like to add to the scanning resolution thread...pointing folks to some resources.A fine source of information about preservation microfilm and uses of digital imaging for preservation/access purposes is The Commission on Preservation and Access. Contact Maxine Sitts, Program Officer, 1400 Sixth Street NW, WDC 20036; ph,303.939.3400; fx,202.939.3407; e-mail, mailto:msitts@cni.org.
The Commission has an excellent list of articles and reports on these issues. This week they released an article by Anne Kenney regarding guidelines for selecting resolutions for text-based materials.
IMHO, be aware that guidelines for scanning text don't carry over to scanning visual/pictorial material. There is not a single solution.
Projects that may provide guidance are Project Open Book at Yale (Paul Conway in Preservation Department of Yale U. Library) and Anne Kenney at Cornell (Olin Library). They have done extensive, production level work on going from microfilm to digital, and digital to microfilm. The Commission has pubished reports on both efforts.
Finally, David Riecks has offered benchmarks for scanning resolutions needed to produce printed output. I defer to his experience in this application. However, I want to suggest that, again, this benchmark is appropriate only for that purpose. Electronic pre-press is one application, archiving visual information is another. I always plead with clients not to JPEG the bejeezus out of an image then toss the uncompressed image (David, I don't know that you are doing either, I'm speaking in generalities). That is a very short term solution that only meets todays requirements and will prove costly in the end (in terms of redoing the process two or three years down the road; and as the microfilm production studies have shown us, the cost of scanning isn't the expensive part, its all the labor intensive work before and after scanning). At Luna we always advise clients to develop a digital image collection of the highest quality and consistency so that 1.) the collection will move to new platforms as a whole and 2.) all derivative applications (pre-press, Internet, multimedia, collections management, etc.) are implemented from that digital image collection resource.
I'll close on that promotional note. But I'm going to post some questions for Imagelibbers over the weekend that should produce some interesting discussion. I learn a lot from this list.
Best wishes to all,
Kevin
------------------------------------- Kevin Donovan Director of Special Projects Luna Imaging Inc. 1315 Innes Place Venice, CA 90291 ph: 310.452.8370 fx: 310.452.8389 E-mail: Kevin Donovan<mailto:donovan@luna-img.com> or kdonovan@swcp.com 05/05/95 07:06:05
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