Live broadcast interaction method and apparatus, live broadcast system and electronic device

The live broadcast interaction method according to claim, 3, wherein the step of predicting the action posture of the anchor interaction action according to the reference point position vector by using an inverse kinematic algorithm comprises:

• calculating, according to the reference point position vector, a height of a central point of an interaction limb of the anchor and a posture rotation matrix of the interaction limb of the anchor relative to the video collection apparatus;
• calculating a position vector of each limb joint of the interaction limb of the anchor according to the posture rotation matrix, the reference point position vector and the height of the central point, the position vector comprising a component of the interaction limb of the anchor in each reference axis direction;
• and
• obtaining the action posture of the anchor interaction action according to the calculated position vector of each limb joint.

A live broadcast system, comprising a live broadcast providing terminal, a live broadcast receiving terminal and a live broadcast server communicating with the live broadcast providing terminal and the live broadcast receiving terminal respectively;

• wherein the live broadcast providing terminal is configured to detect, when it is detected from an anchor video frame collected by a video collection apparatus in real time that an anchor initiates an anchor interaction action, an action posture and an action type of the anchor interaction action, generate, according to the action posture and the action type of the anchor interaction action, an interaction video stream of a virtual image corresponding to the anchor, and send the interaction video stream of the virtual image to a live broadcast server, wherein the anchor interaction action comprises a target prop wearing action and/or a target limb action;
• the live broadcast server is configured to send the interaction video stream of the virtual image to the live broadcast receiving terminal;
• and
• the live broadcast receiving terminal is configured to play the interaction video stream of the virtual image in a live broadcast interface.