3D gesture stabilization for robust input control in mobile environments

摘要

A non-contact gesture sensor is mounted within a vehicle for vehicle occupants to enter control commands by using hand gestures. The effects of vehicle motion and vibration are stabilized by an electronic circuit that includes an inertial motion sensor (IMU) in rigidly fixed relation to the gesture sensor. An adaptive filter processes the gesture sensor signal and the IMU sensor signal by modeling the arm and hand as a semi-rigid articulated body using a transfer function that relates accelerations measured by the IMU with vehicle motion-induced accelerations of the hand. The filter calculates a noise-reduced gesture signal by subtracting out the motion-induced accelerations and measurement noise. The filter also outputs a confidence measure that controls a threshold circuit that inhibits use of the filtered gesture signal when confidence in the filter's system estimation is low.

主权项

1. A stabilized gesture detecting circuit for use with a vehicle comprising:
an inertial sensor mounted to said vehicle and producing a vehicle motion signal indicative of changes in vehicle motion; a non-contact gesture sensor mounted in fixed relation to said inertial sensor and producing a gesture signal in response to hand gestural motions of a vehicle occupant; a filter coupled to receive said vehicle motion signal and said gesture signal and producing a filtered gesture signal; the filter being tuned to reduce motion-induced noise in said gesture signal corresponding to movement of the gesture sensor; and the filter being further tuned to reduce motion-induced noise in said gesture signal corresponding to vehicle motion-induced non-gestural motion of the vehicle occupant's hand.