Provided is a method of detecting lip activity. The method determines magnitude of optical flow in lip region and at least one non-lip region of a detected face. The ratio of magnitude of optical flow in lip region and at least one non-lip region is compared against a threshold. If the ratio is found to be greater than the threshold, lip activity of the detected face is recognized.
申请公布号
US2014010418(A1)
申请公布日期
2014.01.09
申请号
US201113980827
申请日期
2011.03.21
申请人
DEY PRASENJIT;MADHVANATH SRIGANESH;HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.