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This system recognizes the face direction of the TV user and when the user is not looking at the TV, the system will reduce the brightness automatically. On the other hand, when the system detects users' attention to the TV, the brightness will increase. To develop the prototype of this system, the face detection program OpenCV is used. A hand-made signal transmitter and signal receiver were also used to change the brightness of the TV. As a result of an experiment with the prototype system, we could confirm a 30% reduction of the TV's watt-hours.

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Q: Big screen tv has brightness on faces?
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