Patent ID: 8373654

Claim:
An image based motion gesture recognition method, comprising steps of: receiving image frames; performing a hand posture detection according to said image frames, to obtain a first hand posture; determining whether said first hand posture matches a predefined starting posture; if said first hand posture matches said predefined starting posture, performing a movement tracking according to hand locations on said image frames, to obtain a motion gesture; performing said hand posture detection according to said image frames during said movement tracking, to obtain a second hand posture; determining whether said second hand posture matches a predefined ending posture; and if said second hand posture matches said predefined ending posture, stopping said movement tracking; wherein the step of performing said hand posture detection further comprises: detecting whether a hand image exists in at least one of said image frames; obtaining a contoured hand image according to said hand image if said hand image exists in at least one of said image frames; determining a hand direction and a finger number according to said contoured hand image, wherein the step of determining said finger number further comprises steps of: performing a palm orientation calculation to obtain a gravity center of said contoured hand image; performing a palm cut on said contoured hand image according to said gravity center, to obtain a cut hand image; and determining said finger number according to said cut hand image; recognizing said first hand posture or said second hand posture according to said hand direction and said finger number.