Cruise UAV Video Compression Based on Long-Term Wide-Range Background

With the rapid development of Unmanned Aerial Vehicle (UAV), the compression of video data captured by UAV has become a growing critical issue. However, most advanced coding schemes, like H.264 and HEVC, are oriented for common videos and thus cannot afford ideal coding efficiency when applied to UAV platform. Considering the characteristics of UAV video, much more improvement could be imposed onto current coding schemes to make full use of UAV's sensor information. In this paper, we exploit long term redundancy existing in the video data captured by cruise UAV. Firstly, we establish a long-term wide-range background set for reference. Then we separate each frame into new-area part and overlapped part. Lastly, we use GPS information of each frame to get reference from background set and compress two parts individually. In the experiments, by comparing to standard HEVC, our method has given more than 20% reduction in bitrate and meanwhile more than 4% gain in PSNR.