Methods and apparatus for indirect illumination in electronic media rating systems
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United States of America Patent
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Apr 12, 2011
Grant Date -
Dec 23, 2010
app pub date -
Aug 27, 2010
filing date -
Jun 8, 2005
priority date (Note) -
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Abstract
Methods and apparatus for indirect illumination in electronic media rating systems are disclosed. A disclosed example method to detect an audience member includes reflecting non-visible light off of a room surface to indirectly illuminate a first portion of the room, receiving reflections of the indirect illumination, processing the received reflections to determine whether an audience member is present in the illuminated portion of the room, and when the audience member is not detected, adjusting a source of the non-visible light to illuminate a second portion of the room.
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