THREE-DIMENSIONAL POSTURE ESTIMATION APPARATUS, THREE-DIMENSIONAL POSTURE ESTIMATION METHOD, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To estimate a posture of a posture estimation target from a two-dimensional image when positional relation between the posture estimation target and a camera and a moving direction of the posture estimation target are unknown.;SOLUTION: A three-dimensional motion data acquisition part 111 outputs three-dimensional motion data of a human joint and a virtual viewpoint projection part 112 generates two-dimensional motion data obtained by two-dimensionally projecting each joint to a virtual viewpoint in each virtual viewpoint on a surface of viewpoint sphere around a joint of a waist. A motion model learning part 113 generates a motion model from the three-dimensional motion data and the two-dimensional motion data. An image input part 131 successively inputs image data and a feature value calculation part 132 calculates a feature value indicating a position of the human joint and its change from image data. A three-dimensional posture estimation part 133 calculates posterior probability that each of a plurality of motion models is observed after observation of the feature value calculated from image data up to just preceding image data in the output order of the image data and obtains a posture from the motion model with the calculated highest posterior probability.;COPYRIGHT: (C)2014,JPO&INPIT