EXPRESSION DETECTOR

摘要

PURPOSE: To exactly detect facial expression with high robustness in real time. CONSTITUTION: This detector is provided with an extraction part 16 extracting only the part distinct in facial expressions from a facial video signal DVL, a wavelet filter 18 generating a spatial frequency F by performing wavelet conversion for the extracted video signal DVLe, an average power calculation part 20 calculating the average power Pc of the spatial frequency F for every prescribed band and a difference calculation part 24 obtaining a feature vector FV by calculating the difference of the average calculated power Pc and the average power Pn of expressionless which is preliminarily stored in a stationary state storage memory 22.