| 摘要 |
Systems and methods for detecting a raw position on a surface pointed to by a user, observing motion in the raw position, filtering that motion to reduce perceived tremor, and presenting a marker on a surface at a smoothed position with the filtered motion are provided. Certain embodiments may include an infrared laser pointer, a position sensitive detector, a visible laser pointer, and a control system. Other embodiments may use a combined detector/highlighter, a combined detector/pointer, a registration mechanism, a projected marker, a separate pointing surface, a pointer that transmits mouse clicks, a pointer that modulates a laser to indicate mouse clicks, and/or a laser pointer with built-in tremor control. Any suitable filtering technique may be used to filter the detected tremor, including band pass filters, Kalman filters, and linear equalization filters. |
