Abstract:
An apparatus for non-contact 3D hand gesture recognition with code-based light sensing is provided, including a plurality of light emitters, at least a light sensor, and a controller, wherein the controller is connected to and controls the plurality of light emitters to emit lights containing a respective identification code. The emitted lights can be reflected by an object, for example, a hand in our application. The at least a light sensor can identify the original light emitter of each respective reflected light through the identification code as well as computing the power level of each respective reflected light to determine the distance or location of the object. The hand gesture recognition can be deduced based on the power levels of respective reflected lights over a time period.
Abstract:
A light sensor system includes at least one light emitter, a light sensor unit and a processing unit. The light sensor unit is arranged to receive reflected light from an object in accordance with a time sequence in which the at least one light emitter is activated, and accordingly output a plurality of reflected signals. The processing unit is arranged to receive the reflected signals, identify a signal function of time by referring to occurrence sequence of local peak levels of the reflected signals, and determine motion of the object according to the signal function of time. Another light sensor system is proposed. The major difference between the two light sensor systems is that the processing unit of the another light sensor system is arranged to identify the signal function of time by comparing a predetermined threshold with signal levels of the reflected signals.