Message-Id: <200105301920.MAA14998@dns.ccit.arizona.edu> Date: Wed, 30 May 2001 15:15:48 -0400 From: Anthony Troncale <mailto:troncale@AMNH.ORG> Subject: Re: Overhead scanners To: mailto:IMAGELIB@LISTSERV.ARIZONA.EDU
<pre>
Luiz:
If you are not familiar with Octavo, take a look at: http://www.octavo.com/
Overhead scanners:
Minolta 7000 http://www.minolta.com
Bookeye http://www.bookeye.com/html/home_english.html
Zeutschel http://www.zeutschel.de/frame_e.htm
I do not endorse any of the above...
Anthony Troncale
American Museum of Natural History
At 02:08 PM 5/30/01 -0400, you wrote:
>I'm interested as well. Please reply to the list.
>
>John Warren
>2601-A Wilson Blvd.
>Arlington, VA 22201
>
>
>-----Original Message-----
>From: IMAGELIB [mailto:mailto:IMAGELIB@LISTSERV.ARIZONA.EDU]On Behalf Of Luiz
>da Camara leme
>Sent: Wednesday, May 30, 2001 12:51 PM
>To: mailto:IMAGELIB@LISTSERV.ARIZONA.EDU
>Subject: Overhead scanners
>
>
> Hello everybody:
>
> I am new to this list. The message bellow was the first I received so
>far, and this is my first post.
>
> The reason I subscribe this list its because I have a very special
>interest in overhead scanners.
> I am thinking about preserving vasts amounts of data and making CD books
>out of public domain printed books as well as publishing very rare books and
>manuscripts.
>
> I don't know much about this but I will be reading quite a lot os
>messages from this list archives to find out more about this.
>
> I would appreciate very much any info about solutions for what I need to
>do. Types of available scanner (I only know 2) software needed, solutions
>for this purpose.
>
> Also info about where I can retrieve related knowledge will also be
>appreciated.
>
> I am sure this is of no interest to many more advanced members of this
>list.
> So I can be contacted in private not to disturb everybody else.
>
> Luiz da Camara Leme
>
>
>
>----- Original Message -----
>From: "Mary Winter" <mailto:mary.winter@MAIL.STATE.KY.US>
>To: <mailto:IMAGELIB@LISTSERV.ARIZONA.EDU>
>Sent: Wednesday, May 30, 2001 4:31 PM
>Subject: Re: information contained in surrogates
>
>
> > Our photographer, Nathan Prichard, has been looking over my shoulder on
>this
> > discussion. I include his thoughts on this below:
> >
> > Mary,
> >
> > Well, I see a Hollinger box of weasels has been opened.
> >
> > I derived my very approximate figures based on the normal
> > levels of resolution for various film formats, if the
> > photographer is doing his part. These are the resolutions
> > on the film, which are almost always less than what the
> > lenses are actually capable of producing, if that nasty old
> > physical stuff with emulsion were not involved. Resolution
> > is in line pairs per millimeter (often listed as lines per
> > millimeter or lpm). The lines are separated by a space equal
> > to the width of the line, so the pair actually made up of a
> > black line and a white one (| (sp) | (sp) |). In digital
> > terms, that means two pixels (one for the black and one for
> > white/blank space). So a resolution in lpm's is doubled for
> > pixels (or dots) per millimeter and then multiplied by 25.4
> > (millimeters per inch) for dpi (dots per inch).
> >
> > lpm x 2 x 25.4 = dpi
> >
> > Film size Nominal lpm Approx. DPI
> >
> > 35mm 80 4,000
> >
> > 120 60 3,000
> >
> > 4x5 40 + 2,000
> >
> > [8x10 uses some of the same or similar lenses as 4x5.
> > Resolution would be about the same, at least for many
> > modern lenses. Some lenses can produce greater resolution
> > on some formats, as with macro/copy applications.]
> >
> > Uncompressed file size can be calculated by multiplying the
> > format dimensions (in inches) by the dpi squared for B & W.
> > For color, multiply that result by three (assuming 8 bit
> > color depth in both cases).
> >
> >
> > Nathan
> >
> > I think this is pertinent to the original question about stitching files.
> > Please note, however, that the issue of resolution was not the primary
> > factor in our decision to incorporate analog surrogates into our
> > preservation/access workflow. But then, we have Nathan . . .
> >
> >
> > Thanks, Mary
> >
> > Mary E. Winter
> > Special Collections Manager
> > Kentucky Historical Society
> > 100 W. Broadway
> > Frankfort, KY 40601
> > tel.: (502) 564-1792 ext. 4428; fax. (502) 564-4701
> >
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