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Researchers virtually open and read sealed historic letters


Credits:
Image: Courtesy of MIT Libraries
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Researchers were able to read the contents of a letter from Jacques Sennacques to his cousin Pierre Le Pers, a French merchant in The Hague.
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The virtual unfolding technology generates 2D and 3D reconstructions of the letter.
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An international team of scholars has read an unopened letter from early modern Europe without breaking its seal or damaging it in any way using an automated computational flattening algorithm. The team, including MIT Libraries and Computer Science and Artificial Intelligence Laboratory (CSAIL) researchers and an MIT student and alumna, published their findings today in a ....

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New Technique Unfolds Centuries of Secrets in Locked Letters


New Technique Reveals Centuries of Secrets in Locked Letters
M.I.T. researchers have devised a virtual-reality technique that lets them read old letters that were mailed not in envelopes but in the writing paper itself after being folded into elaborate enclosures.
The computer-generated unfolding sequence of a sealed letter.Credit.Unlocking History Research Group
Published March 2, 2021Updated March 4, 2021
In 1587, hours before her beheading, Mary, Queen of Scots, sent a letter to her brother-in-law Henry III, King of France. But she didn’t just sign it and send it off. She folded the paper repeatedly, cut out a piece of the page and left it dangling. She used that strand of paper to sew the letter tight with locking stitches. ....

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Scientists Just Jury-Rigged a Dental X-Ray Machine to Read a 300-Year-Old Letter Without Unfolding Its Delicate Paper


Scientists Just Jury-Rigged a Dental X-Ray Machine to Read a 300-Year-Old Letter Without Unfolding Its Delicate Paper
The method allows researchers to avoid damaging delicate documents.
March 2, 2021
Virtual unfolding algorithms allow us to read this unopened letter with a paper lock from the Brienne Collection in The Hague, Netherlands. Photo courtesy of the Unlocking History Research Group archive.
Opening a letter may seem like a straightforward task, but that’s only in the age of mass-produced gummed envelopes, first invented in the 1830s.
For hundreds of years before that, many people relied on “letterlocking,” sealing their mail with a sequence of elaborate creases, folds, tucks, and slits. There were hundreds of different ways this could be deployed to secure mail from prying eyes. ....

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