Digital Rendering of Ancient Books

Overview

Through archaeological excavations or even chance discoveries, people around the world have uncovered artifacts from the past. Many times, they are extremely delicate due to decay caused by exposure to their natural surroundings. Ancient codices of books, such as scrolls and cuneiform tablets, are no exception to this phenomenon. Book historians are in a race against time and natural decay to uncover and analyze the records of the ancient world that still survive. In the past, it was common for historians to set aside overly delicate pieces in hopes of future technology that would allow for new technologies that would allow for the study of the artifact. Now, using advancing technologies such as micro CT scanners, scholars are able to digitally scan and preserve these artifacts. They are able to study the digital version of the texts using less intrusive methods that contribute to the conservation of these pieces of history into the future.

Micro CT Scanning

Archaeological use of CT scanners involves the use of X-rays aimed at the artifact. Rather than being stationary, the object is rotated around an axis. The X-rays are emitted from the front through the object, and then 2d images are collected on an X-ray detector that is placed behind the object. This technology has been in use in geology and paleontology for a couple decades, however, there have been advances in its software analysis. This technology can also be used for other fields, such as medicine and biology. More information on micro-CT scanning can be found here.

Software Development

At the University of Kentucky, a computer scientist named W. Brent Seales created a software program that now allow book historians to recover the texts of old codices, such as ancient scrolls. Previously, according to a New York Times article, "methods like CT scans can pick out blobs of ink inside a charred scroll, but the jumble of letters is unreadable unless each letter can be assigned to the surface on which it is written. Dr. Seales realized that the writing surface of the scroll had first to be reconstructed and the letters then stuck back to it. He succeeded in 2009 in working out the physical structure of the ruffled layers of papyrus in a Herculaneum scroll. He has since developed a method, called virtual unwrapping, to model the surface of an ancient scroll in the form of a mesh of tiny triangles. Each triangle can be resized by the computer until the virtual surface makes the best fit to the internal structure of the scroll, as revealed by the scanning method. The blobs of ink are assigned to their right place on the structure, and the computer then unfolds the whole 3-D structure into a 2-D sheet."

News article

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Scholarly articles

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how the scanner works

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