A good-looking robot is seriously hard to find. Robots can be pretty, some even handsome, but as soon as they get too realistic they start to creep us out. A new system for helping robots to generate more realistic expressions might go some way to help.
Many years ago, roboticists realised that as you morph an abstract robot into a human you generate a peak of unease - the "uncanny valley principle" - that makes people feel uncomfortable when a robot looks realistic but not realistic enough. Some say itís because they remind us of a corpse. However, research has shown that if you manipulate the robotic images so that they are more attractive, you can bypass this feeling of unease.
To create a robot we are more likely to accept, life-like expressions are vital. Thatís why Nicole Lazzeri at the University of Pisa, Italy, and her colleagues have designed a "Hybrid Engine for Facial Expressions Synthesis" (HEFES) - a facial animation engine that gives realistic expressions to a humanoid robot called FACE.
FACEís appearance is modelled on one of the teamís wives. "Itís really realistic," says Lazzeri, who presented the work at BioRob in Rome last month. See for yourself in the video above.
To mimic the myriad expressions that facial muscles are capable of achieving, the team placed 32 motors around FACEís skull and upper torso that manipulate its polymer skin in the same way that real muscles do.
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