Scientists at Washington University in St. Louis have created a robot photographer, called Lewis, that is able to wander round a room, pick out faces and snap decent shots.



A small canister with wheels and a video camera for an eye, Lewis seeks bare skin like a Playboy photographer. When it finds some, it uses a number of techniques to determine which skin is part of a face.



It then tries to compose the picture by following the rule of thirds, which suggests that a picture split horizontally and vertically into thirds will have its main points of interest where these lines intersect.

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