Abstract: With the continuous progress of science and technology and social development,urban security monitoring system is also constantly improved,how to make full use of the massive monitoring video data has become a hot issue.This paper proposes a method of multi-channel video fusion based on 3D scenes.In this method,multiple video streams from a specified region of a 3D scene are fused into a complete image and projected into the region,thus enhancing the authenticity and effectiveness of the virtual 3D scene.At the same time,aiming at the problem of projection texture mapping,this paper proposes a texture mapping algorithm to solve the problem of occlusion penetration caused by the lack of depth information.By establishing a one-to-one correspondence between the model vertices and the texture coordinates,video frames are projected as textures into 3D scene models.Experimental results show that the proposed method can effectively integrate video and 3D scene models.

Key words: 3D projection, Texture mapping, Video fusion, Virtual-reality