Patent ID: 8660314

Claim:
An operating method for a motion-controlled device, executable by an electronic device comprising a processor and a memory, the operating method for the motion-controlled device comprising: receiving a sequence of video frames via an image capture device connected to the electronic device; selecting two distinct frames from the sequence of video frames by the processor; executing phase correlation on the two distinct frames by the processor; storing normalized phase correlation values of the two distinct frames as a result of the phase correlation in a phase correlation image in the memory, wherein the phase correlation image records the normalized phase correlation values in a two-dimensional coordination space and is representative of a three-dimensional phase correlation surface in a three-dimensional coordination space spanned by axes of the two-dimensional coordination space and an axis representing scales of the normalized phase correlation values; locating a peak of the three-dimensional phase correlation surface by the processor; obtaining a motion of an object in the two distinct frames based on a location of the peak by the processor, wherein the peak reflects the motion; identifying the motion as a qualified motion based on magnitude of the motion and a cross-sectional area of the peak by the processor; and activating a function of the electronic device in response to the qualified motion.