Ever seen a photo on the Internet and said to yourself, "Fake"? Now you can know for sure.
A computer science professor at Dartmouth as developed a free online image verification service that can decide whether a photo is legitimate or digitally manipulated.
Just load a picture into Izitru ("Is it true") and the site will analyze it.
The tests can help determine whether an image is a camera original or if it has been altered in some way from the initial time of recording. One of the most important parts of the analysis is the re-saving part, Dr. [Hany] Farid said in an e-mail, so where the system can’t say specifically what happened to the image after capture, it can detect that something happened.
“This service tells you whether the image you’re looking at is most likely an original,” he said.
The service has business implications, Farid said. It could be used by insurance companies to verify that accident photos are real, or firms like eBay could use the site to authenticate the credibility of images of items being sold.
But Farid he had in mind citizen journalists who take photos and post online, only to be accused of faking photos.
“Nobody would deny there is a need to authenticate photos,” he said. “More and more photojournalists are putting images out there. This is a way of getting people into the habit of bypassing the doubt.”
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