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Noah, </div>
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I'm wondering if some of the mapping tech that Erin presented at the OhioDIG meeting last week might be interesting to consider... Specifically thinking about the map overlays. In this case, treating each "trans-vision" image/page as a map layer, then adding
and removing layers to view as one would with the physical copy? If I'm understanding the object correctly. </div>
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The meeting recording should be on the website next week if you didn't make it live. </div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Ohiodig <ohiodig-bounces@lists.library.ohio.gov> on behalf of ohiodig-request@lists.library.ohio.gov <ohiodig-request@lists.library.ohio.gov><br>
<b>Sent:</b> Friday, March 8, 2024 10:55 AM<br>
<b>To:</b> ohiodig@lists.library.ohio.gov <ohiodig@lists.library.ohio.gov><br>
<b>Subject:</b> *External* Ohiodig Digest, Vol 75, Issue 8</font>
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Today's Topics:<br>
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1. FW: What's historic? That's up to you. CML community<br>
collecting. From Axios Columbus (Carleton, Janet (she/her))<br>
2. Fwd: Scanning Transparent Documents (Noah Stegman Rechtin)<br>
<br>
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----------------------------------------------------------------------<br>
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Message: 1<br>
Date: Fri, 8 Mar 2024 14:23:09 +0000<br>
From: "Carleton, Janet (she/her)" <carleton@ohio.edu><br>
To: "ohiodig@lists. library. ohio. gov<br>
(ohiodig@lists.library.ohio.gov)" <ohiodig@lists.library.ohio.gov><br>
Subject: [Ohiodig] FW: What's historic? That's up to you. CML<br>
community collecting. From Axios Columbus<br>
Message-ID:<br>
<LV8PR01MB849815FAFDCEEC8AB360182DAD272@LV8PR01MB8498.prod.exchangelabs.com><br>
<br>
Content-Type: text/plain; charset="us-ascii"<br>
<br>
Nice piece on Columbus Metro Library's My Upload program<<a href="https://myupload.columbuslibrary.org/">https://myupload.columbuslibrary.org/</a>>.<br>
<br>
"The library system's My Upload program<<a href="https://myupload.columbuslibrary.org/">https://myupload.columbuslibrary.org/</a>> offers residents the chance to preserve memories and community landmarks for generations to come."<br>
<br>
1 big thing: What's historic? That's up to you<br>
<a href="https://www.axios.com/newsletters/axios-columbus-1fc62112-d919-4225-b38a-45ec224a2774.html?chunk=0&utm_term=emshare#story0">https://www.axios.com/newsletters/axios-columbus-1fc62112-d919-4225-b38a-45ec224a2774.html?chunk=0&utm_term=emshare#story0</a><br>
<br>
<br>
---<br>
Janet Carleton| Digital Initiatives Coordinator | Digital Initiatives | Mahn Center for Archives and Special Collections, Preservation & Digital Initiatives | OHIO University Libraries | Alden 333 | Athens, Ohio | 740.597.2527 | carleton@ohio.edu<<a href="mailto:carleton@ohio.edu">mailto:carleton@ohio.edu</a>>
| <a href="https://media.library.ohio.edu<https://media.library.ohio.edu/>">https://media.library.ohio.edu<https://media.library.ohio.edu/></a> | she/her/hers<br>
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Message: 2<br>
Date: Fri, 8 Mar 2024 10:55:43 -0500<br>
From: Noah Stegman Rechtin <noah@tswm.org><br>
To: "ohiodig@lists. library. ohio. gov<br>
(ohiodig@lists.library.ohio.gov)" <ohiodig@lists.library.ohio.gov><br>
Subject: [Ohiodig] Fwd: Scanning Transparent Documents<br>
Message-ID:<br>
<CALny=GCQE28HFE0H+jCFgz6EyseEiY0QawVcnOfTV8-Fsn_c_w@mail.gmail.com><br>
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Dear All,<br>
<br>
Could anyone offer any suggestions on how to best scan partially<br>
transparent documents? I know this sounds like a joke, but it's a serious<br>
question.<br>
<br>
Yesterday, an individual donated a number of World War II manuals to our<br>
museum and one of them, a description of the C-1 autopilot vertical flight<br>
gyroscope, uses what was at the time a brand new technology called<br>
"Trans-Vision". (It was apparently originally popular for medical<br>
instruction, so another name for the format seems to be "anatomical<br>
transparency <<a href="http://onlinelibrary.wiley.com/doi/10.1002/ca.21028>".">http://onlinelibrary.wiley.com/doi/10.1002/ca.21028>".</a>) The<br>
document has a sequence of transparent pages that incrementally show more<br>
layers of the device as each page is turned. For example, the exterior of<br>
the case, a pair of guides for the rotors, the rotor case, the rotor itself<br>
and finally the motor inside.<br>
<br>
The difficulty is that the transparency is a key point of how the<br>
manual functions. Each page, to a greater or lesser extent, relies on the<br>
illustration on the next one, as it only shows a portion of the<br>
whole device. Furthermore, each page is double sided, so that the front and<br>
back side of each layer is shown on the obverse and reverse of each page.<br>
<br>
I'm guessing that the best way to handle it is to just scan all of the<br>
pages together and try to capture the details on the page behind it<br>
together as one page. The alternative would be to try to scan each page<br>
separately. In theory, with the correct implementation and adjustments,<br>
this would be the more accurate depiction. However, it would require keying<br>
out the background with an alpha layer<br>
<<a href="http://en.wikipedia.org/wiki/Alpha_compositing">http://en.wikipedia.org/wiki/Alpha_compositing</a>> *and* a book viewer with<br>
the ability to display the underlying page in addition to the one (or,<br>
rather, two) that is usually visible.<br>
<br>
Sincerely,<br>
Noah Stegman Rechtin<br>
*Collections Manager & Museum Attendant*<br>
*Tri-State Warbird Museum <<a href="http://www.tri-statewarbirdmuseum.org/">http://www.tri-statewarbirdmuseum.org/</a>>*<br>
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