摘要 |
Systems and methods for detecting a raw position on a surface (106) pointed to by a user (104), observing motion in the raw position, filtering that motion to reduce perceived tremor, and presenting a marker on a surface (106) at a smoothed position with the filtered motion are provided. Certain embodiments may include an infrared laser pointer (102), a position sensitive detector (110), a visible laser pointer, and a control system (112). Other embodiments may use a combined detector/highlighter (131), a combined detector/pointer (142), 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. |