Here's an account of Yang Cai's tombstone-reading software in action.
"This is just kind of a fun project ... but I think it's very meaningful to have something where people feel excited," said Cai, director of Carnegie Mellon CyLab's ambient intelligence lab, as research assistants cloaked in black focused a beam of light and a digital camera on Isabelle Seville's weathered gravestone. "We take this as a combination of science, art, technology and culture."
The Rev. Richard Davies couldn't read the worn indentations in Seville's tombstone. Charcoal or crayon rubbings revealed little. But Cai's technology constructed a 3-D image, complete with Seville's name, and her place and date of birth -- London, 1781. [Link]