While observing and recording specific people

multiple videos are needed for sufficient information gathering

which leads to storage of abundant useless data and results in difficulty for searching and analyzing of observation videos. A combination method of multiple observation videos based on face angle estimation is proposed to solve this problem. A single video which only contains facing scenes of moving people is obtained and stored by splitting multiple observation videos

detecting face and recombining based on the face angle estimation.Experiments verify the feasibility of this method and the influence of asynchronous videos is discussed.