Volume Cartography is the name of a computer program for locating and mapping 2-dimensional surfaces within a 3-dimensional object.

X-ray An X-ray, or, much less commonly, X-radiation, is a penetrating form of high-energy electromagnetic radiation. Most X-rays have a wavelength ranging from 10 picometers to 10 nanometers, corresponding to frequencies in the range 30&nb ...

s can reveal minute details of what is in an object, and computer program such as Volume Cartography can organize the images into layers, a process called

volume rendering In scientific visualization and computer graphics, volume rendering is a set of techniques used to display a 2D projection of a 3D discretely sampled data set, typically a 3D scalar field. A typical 3D data set is a group of 2D slice imag ...

Burned scrolls

Ein Gedi Ein Gedi ( he, עֵין גֶּדִי‎, ), also spelled En Gedi, meaning "spring of the goat, kid", is an oasis, an Archaeological site, archeological site and a nature reserve in Israel, located west of the Dead Sea, near Masada and the Qu ...

is a community that was destroyed by

Byzantine The Byzantine Empire, also referred to as the Eastern Roman Empire or Byzantium, was the continuation of the Roman Empire primarily in its eastern provinces during Late Antiquity and the Middle Ages, when its capital city was Constantinopl ...

emperor

Justinian Justinian I (; la, Iustinianus, ; grc-gre, Ἰουστινιανός ; 48214 November 565), also known as Justinian the Great, was the Byzantine emperor from 527 to 565. His reign is marked by the ambitious but only partly realized ''renovat ...

in 800 AD. The burning of the synagogue reduced its scrolls on

parchment Parchment is a writing material made from specially prepared untanned skins of animals—primarily sheep, calves, and goats. It has been used as a writing medium for over two millennia. Vellum is a finer quality parchment made from the skins o ...

to lumps of charcoal. The burned scrolls were discovered by archaeologists during an excavation in 1970. They were so fragile that they disintegrated whenever touched. Various attempts were made to mechanically unwind and read the scrolls, but the scrolls were too delicate. In 2016, W. Brent Seales, a researcher at the

University of Kentucky The University of Kentucky (UK, UKY, or U of K) is a public land-grant research university in Lexington, Kentucky. Founded in 1865 by John Bryan Bowman as the Agricultural and Mechanical College of Kentucky, the university is one of the state ...

, created a set of computer programs called Volume Cartography to reconstruct the layers of text in a digital X-ray image of the one of the scrolls, known as the

En-Gedi Scroll The En-Gedi Scroll is an ancient Hebrew parchment found in 1970 at Ein Gedi, Israel. Radiocarbon testing dates the scroll to the third or fourth century CE (210–390 CE), although paleographical considerations suggest that the scrolls may date b ...

Process

Volumetric scan

X-ray microtomography X-ray microtomography, like tomography and X-ray computed tomography, uses X-rays to create cross-sections of a physical object that can be used to recreate a virtual model (3D model) without destroying the original object. The prefix ''micro-'' ...

(Micro-CT) scanner creates a 3-dimensional image of the sample. An X-ray scanner can produce a spot as small as 10

microns The micrometre ( international spelling as used by the International Bureau of Weights and Measures; SI symbol: μm) or micrometer (American spelling), also commonly known as a micron, is a unit of length in the International System of Unit ...

Segmentation

Surfaces are found and broken into small triangles, resulting in a triangular mesh defining the surface.

Texturing

Each point in the mesh is assigned a weight, indicating the likelihood that the point contains writing.

Flattening

The mesh surface is mapped onto a plane.

Merging

The pieces of the recovered surface are assembled into a single image.

References

Cartography Data visualization software Hebrew manuscripts {{compu-prog-stub