| 摘要 |
A wireless user-interface method and arrangement having a light source and a circuit arrangement that detects the presence and position of the light source. A light source emits modulated light having a first modulation frequency that is captured by a camera circuit arrangement. A circuit arrangement uses relative pixel luminances and differences in pixel luminances between frames to detect the presence of modulated light from the light source. The position of the light source is tracked from frame to frame and the position information is output for use by application software or circuitry to direct movement of a pointer in a computer display, for example. Modulated light having a second modulation frequency from the light source is detected by the circuit arrangement and interpreted as selection of a control function, which is provided as output to application software or circuitry. The application uses the position of the light source along with control signals to identify an operation to perform.
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