Message-Id: <mailto:199503170000.SAA10492@library.wustl.edu> Date: Thu, 16 Mar 1995 16:44:08 -0600 From: Mark Olsen <mailto:mark@TUNA.UCHICAGO.EDU> Subject: Re: Microfilm digitizing To: Multiple recipients of list IMAGELIB
>> From: Owen <mailto:Somerset@INTERRAMP.COM>
>> Subject: Re: Microfilm digitizing
>>
>> Pardon my Ignorance, but I thought that microfilm was black&white w/o grey.
Microfilm is, to my limited understanding of photo-reproduction, a black and white photograph which, because it is an analogue process, admits greys as any other black and white photograph would. You can compare if you have a Web browser with image capabilties:
Black/White image of MSS taken directly from film: http://tuna.uchicago.edu/images/Ambros/ambros1.gif (121134 bytes)
Grey scale image of MSS taken from a photocopy (using a microfilm printer) of the same document/microfilm (different page): http://tuna.uchicago.edu/images/Ambros/Dante_ms.jpeg (552594 bytes)
In my opinion, the greyscale image is *much* better even tho' it is far smaller (not in bytes) in the number of pixels displayed. I would like to see if direct greyscale film scanning can give similar results.
>>
>> Which vendor did you try?
>>
I'd prefer not to mention names on the list. Get back to me directly if you want the name.
Mark
Mark Olsen Assistant Director ARTFL Project University of Chicago (312) 702-8687 Gopher: gopher.uchicago.edu/11/uscholarly/artfl WWW: http://tuna.uchicago.edu/ARTFL.html
Nothing will ever be attempted if all possible objections must first be overcome. --- Samuel Johnson
