Marker-free virtual reality hybrid performance system

A marker-free virtual reality hybrid performance system is provided. Includes a tracking and positioning system, a camera, a color keypad, a workstation and a video monitor. The tracking and positioning system is used for judging and tracking the movement of the camera in time and space, and selecting a plurality of mark points in the moving process of the camera. Cameras shoot real people, objects and scenes. Color keystrokes make the color in the video picture transparent and transmit it to the workstation. According to the position information and time information of each mark point transmitted from the tracking and positioning system, The three-dimensional coordinates of points and positions are established in the three-dimensional virtual space and the customized virtual performance scene is loaded. The three-dimensional coordinates of points and positions loaded in the virtual performance scene are combined with the transparent video picture to obtain the virtual reality mixed performance video. The inv