How Math Might Help Spot Photo Forgeries

Documentary photographer Ken Light, who now teaches photography in the journalism department of the University of California at Berkeley, sent us a tip about an intriguing article in this week's Science News Online. The article details how a computer scientist at Dartmouth College is using mathematics to determine when and how photographs have been manipulated.

Documentary photographer Ken Light, who now teaches photography in the journalism department of the University of California at Berkeley, sent us a tip about an intriguing article in this week's Science News Online. The article details how a computer scientist at Dartmouth College is using mathematics to determine when and how photographs have been manipulated. Apparently the software he's developed is pretty effective: The Associated Press has him examine potentially "fishy" pictures made by the agency's photographers.

The story was of particular interest to Light, because one of the examples used in the article involved a picture he made long ago.