Message-Id: <199704220013.RAA23176@dns.ccit.arizona.edu> Date: Tue, 22 Apr 1997 10:19:25 +1000 From: Jennifer Brasher <mailto:J.Brasher@INS.GU.EDU.AU> Subject: Re: Resolution Standards and Procedures for To: mailto:IMAGELIB@LISTSERV.ARIZONA.EDU
I have this Cornell Manual. I was wondering if others agree with this suggestion for a standard? I'm thinking of the amazing ability to zoom with Livepicture. I have a 2000 DPI scan here that offers so much more when I zoom in on it, the expressions on subjects faces become apparent instead of pixelating, as you keep zooming it does finally show tha grain of the film.
This sort of facility is invaluable in the art environment and can already be done with zoom facilities on a slide projector. Perhaps that is why it has been a booming year in terms of slide projector sales?
Jennifer QCA
>See the excellent discussion of resolution charts in Anne R. Kenney and
>Stephen Chapman, "Tutorial: Digital Resolution Requirements for Replacing
>Text-Based Material: Methods for Benchmarking Image Quality," published by
>the Commission on Preservation and Access in April, 1995. They note that
>ANSI/AIIM MS44-1988, "Recommended Practice for Quality Control of Image
>Scanners," advises against using IEEE Std 167A-1987 when scanning at below
>600 DPI. Cornell has determined that for monographs, serials, and other
>text-based publications 600 dpi bitonal scanning is sufficient to capture
>most of the information they contain. The RIT Alphanumeric Test Object and
>AIIM Scanner Test Chart #2 are used for measuring resolution.
>
>Further information on the procedures used for measuring image quality can
>be found in the same authors' "Digital Imaging for Libraries and Archives,"
>published by the Dept. of Preservation and Conservation, Cornell
>University, in June, 1996.
>
>______________________________________________
>Peter B. Hirtle
>Manager, Digital Access Coalition phone: 607/255-3530
>2B Kroch Library fax: 607/255-9524
>Cornell University e-mail: mailto:pbh6@cornell.edu
>Ithaca, NY 14853-5302
>______________________________________________
> All opinions expressed are my own, and not those of my employer.
>
>At 9:49 AM +0100 2/4/97, Levine Emil wrote:
>>Colleagues,
>>
>>Here at the UN/IAEA/INIS in Vienna we will begin to scan (1,500,000 pages a
>>year) documents previously put on microfiche. Using microfiche, of course,
>>we film a resolution chart (NBS SRM 1010-A) and measure the resolution using
>>a microscope.
>>
>>At the AIIM meeting last year I asked many time what is the equivelant test
>>for scanning, and never got an answer. I plan to scan the IEEE Std 167A-1987
>> and determine the smallest point size I can read, and .resolution chart
>>(NBS SRM 1010-A), this does not really give a true reading of resolution, as
>>this becomes a factor of the display system and laser printout. We will scan
>>at 240 DPI and use the images for CD-ROM and also to make raster scan com
>>microfiche.
>>
>>Does anyone have a procedure for determining the resolution achieved in
>>scanning and on raster scan COM. Any new standards covering this?
>>
>>Emil Levine
>>Head, INIS Clearinghouse
>>mailto:LEVINE@NEPO1.IAEA.OR.AT
VIEWS EXPRESSED ARE PERSONAL,NOT UNIVERSITY POLICY. ******************************************************************************
Jennifer Brasher `` ` ` ` EMAIL: mailto:J.Brasher@ins.gu.edu.au Art Librarian `` ` ` VOICE: +61 (07) 3875 3132 Image Manager ` ` `FAX: +61 (07) 3875 3133
SNAIL MAIL ` ` ` ` Queensland College of Art Library ` ` ` ` * Griffith University ``````` *
Clearview Terrace ``*` * Morningside Campus * PO Box 84 Morningside Brisbane Queensland 4170 Australia ******************************************************************************
******************************************************************************