Patent ID: 9690386
Date: 2017-06-27
CPC Classifications: G06F

Claim:
1. A method, applied to an electronic device, for performing motion recognition using motion sensor fusion, the method comprising: utilizing a plurality of motion sensors of the electronic device to obtain sensor data respectively corresponding to the plurality of motion sensors, the sensor data measured at a device coordinate system of the electronic device, wherein the plurality of motion sensors comprises inertial motion sensors; performing sensor fusion according to the sensor data to obtain motion data at the device coordinate system and orientation of the electronic device at a global coordinate system, wherein the motion data based on the device coordinate system comprises linear acceleration based on the device coordinate system; selecting one of at least one predetermined plane based on the orientation; mapping the motion data onto the selected one of the at least one predetermined plane to obtain a trajectory on the selected one of the at least one predetermined plane; performing motion recognition based on the trajectory on the selected one of the at least one predetermined plane at the global coordinate system, in order to recognize the user's motion; converting the motion data based on the device coordinate system into at least one portion of the converted data according to the orientation based on the global coordinate system, wherein the at least one portion of the converted data comprise linear acceleration based on the global coordinate system; and according to the converted data based on the global coordinate system, performing motion recognition to recognize the user's motion in the 3D space and at least one character drawn by the user in the 3D space; wherein the linear acceleration based on the global coordinate system and the orientation based on the global coordinate system are utilized for sensing linear translation and rotation motion of the electronic device respectively in three-dimensional (3D) space; wherein the step of converting the motion data based on the device coordinate system into at least one portion of the converted data according to the orientation based on the global coordinate system further comprises: