Monitor: Picture imperfect | The Economist
Picture imperfect
http://www.Economist.com/news/technology-quarterly/21572915-digital-imaging-insurers-publishers-law-enforcement-agencies-and-dating-sites-are Photoshop add-ons for finding doctored photos – eg @Fourand6
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“Efforts to automate the detection of doctored images are bearing fruit. Last year Fourandsix Technologies, a start-up based in Silicon Valley, began selling an add-on for Photoshop, called FourMatch, that determines whether an image has come straight from a camera or has been manipulated. It compares the “metadata” associated with the image against a database of signatures that represent the characteristic ways in which different devices capture and compress image data, to ensure that the image is what it claims to be. …So a human analyst is still needed “in the loop”, says Mr Farid, one of the firm’s co-founders. A trained eye can spot inconsistencies in shadows, reflections and incorrect perspective.”
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