Re: Greyscale scans vs b/w photographs

From: David Adams (David.Adams@NATLIB.GOVT.NZ)
Date: Thu Nov 29 2001 - 16:07:48 CST 

Message-Id: <200111292208.fATM8f502567@sitelicense.arizona.edu>
Date:         Fri, 30 Nov 2001 11:07:48 +1300
From: David Adams <mailto:David.Adams@NATLIB.GOVT.NZ>
Subject:      Re: Greyscale scans vs b/w photographs
To: mailto:IMAGELIB@LISTSERV.ARIZONA.EDU

<pre> There is a good handbook on image quality that will help on tonal reproduction; Digital Imaging for Photographic Collections Frey and Reilly Image Permanence Institute, Rochester Institute of Technology 1999

David Adams Team Leader - Copying and Digital Services National Library of New Zealand
+64 4 4743151 Visit "Papers Past" Online 19th century New Zealand newspapers http://paperspast.natlib.govt.nz Visit "Timeframes" New Zealands leading source of heritage images http://timeframes.natlib.govt.nz

>>> mailto:nl@UNIVERSITY-LIBRARIES.OXFORD.AC.UK 11/30/01 06:48 >>>
Has anyone experience in comparing 8 bit greyscale scans
(ideally captured on a Zeutschel or another bookscaner) with black and white photographs?

What are the general criteria for comparison ((e.g. tonal reproduction, number of colours in black and white photographs) and is there any literature about this issue?

To what extent is the quality of greyscale scans comparable with b/w photographs?

Many thanks, Norbert

------------------- Dr. Norbert Lossau Oxford University Library Services (OULS)/ Head of Oxford Digital Library (ODL) 99 Banbury Road Oxford, OX2 6JX mailto:nl@ulib.ox.ac.uk Phone:+44 1865 284457 Fax:+44 1865 284456

</pre>

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