User input by pointing

摘要

Presented is apparatus for capturing user input by pointing at a surface using pointing means. The apparatus comprises: a range camera for producing a depth-image of the pointing means; and a processor. The processor is adapted to determine from the depth-image the position and orientation of a pointing axis of the pointing means; extrapolate from the position and orientation the point of intersection of the axis with the surface; and control an operation based on the location of the point of intersection.