Naughty robots can now be tamed with this snazzy smile-detecting device from the University of Tsukuba AI Lab. Anna Gruebler and her colleagues have developed a wireless headband that captures electromyographic (EMG) signals from the side of the face, detecting when you’re smiling with delight or frowning with disapproval.

Unlike cameras with smile-detection algorithms, this device can work in low light, while you’re walking around, and when you’re not looking into your computer’s camera. Part of the charm, the researchers say, comes from the discreet headband design that beats traditional face electrodes and wires. via IEEE.org/automaton

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