Behavior description method and apparatus

The invention discloses a method and a device for describing behaviours, belonging to the technical field of behaviour identification. The method comprises steps of obtaining a three-dimensional actor sequence which has total K frames; initializing selected three-dimensional human body models according to a first frame three-dimensional actor in the three-dimensional actor sequences; calculating the first posture parameters and a first three-dimensional human body joint point coordinate; sequentially dividing and tracing limb parts of a second three-dimensional actor to a Kth three-dimensional actor to obtain posture parameters and a three-dimensional human body joint point coordinate of each frame three-dimensional actor from the second three-dimensional actor to the Kth three-dimensional actor; combining the three-dimensional human body joint point coordinates into a three-dimensional human body joint point coordinate sequence, combining all the directional parameters into a directional parameter sequence,