Research on video scene mapping of fixed viewing angle

Mapping special images in video scene has practical important applications in the fields of advertising and television production, while there have been few reports on how to map in the background of video scene without impacting foreground targets which makes the result more realistic. We propose a method to embed images on certain location in video scene of fixed viewing angle. We first build background model from video frames, extract foreground using background subtraction method, then calibrate the camera using intrinsic information from video. On this basis we establish mapping matrices of image coordinate to world coordinate and image coordinate to video image coordinate according to location and orientation parameters. By using mapping matrices we embed the images on the background of video scene in right posture, and reproduce the foreground objects. Experiments in different scenes show that the proposed method is easily to use which makes mapping realistic and without impacting foreground objects, and has a good practicability.