Bi-Directional Motion Estimation For Motion Compensation In The Wavelet Domain
Abstract
One of the main goals of video coding is to reduce the required bitrate to encode a video file to be transmitted or stored. Central to the video coding research is the concept of motion compensation, which has a required pre-processing step of motion estimation. Motion estimation methods used in video coding can be categorized into two groups employing either one (i.e. uni-directional) or two-directional (i.e. bi-directional) search algorithms. Although the uni-directional algorithms are faster than the bi-directional ones, the latter methods have the advantage of recovering objects affected by occlusion which in turn helps to increase the quality of reconstructed video sequences in the decoder side and to reduce the required bitrate to encode a video file. Therefore, our focus in this paper is to analyze the impact of a bi-directional wavelet-based motion estimation algorithm for motion compensation. The proposed method is performed in the wavelet domain using the relationship between wavelet subbands which decrease the computational cost of the search technique by reducing the size of the video frames with the wavelet decomposition. Experimental results demonstrate that the proposed technique outperforms both uni- and bi-directional motion estimation methods in reducing the required bits to be encoded both in spatial and wavelet domains.
Keywords
References
- Bao, W., Lai, W.S., Zhang, X., Gao, Z., Yang, M.H. 2018. MEMC-Net: Motion estimation and motion compensation driven neural network for video interpolation and enhancement. arXiv preprint arXiv:1810.08768.
- Sullivan, G.J., Baker, R.L. 1991. Motion compensation for video compression using control grid interpolation. IEEE International Conference on Acoustics, Speech, and Signal Processing, pp. 2713-2716. DOI:10.1109/ICASSP.1991.150962
- Aydin, V.A., Foroosh, F. 2017. Motion compensation using critically sampled dwt subbands for low-bitrate video coding. IEEE International Conference on Image Processing (ICIP), pp. 21-25. DOI: 10.1109/ICIP.2017.8296235
- Jain, M., Jegou H., Bouthemy, P. Better exploiting motion for better action recognition. 2013. IEEE conference on computer vision and pattern recognition, pp. 2555-2562. DOI: 10.1109/CVPR.2013.330
- Kesner, S. B., Howe, R.D. Position control of motion compensation cardiac catheters. 2011. IEEE Transactions on Robotics 27, no. 6: 1045-1055. DOI: 10.1109/TRO.2011.2160467
- Zhang, L., Qiao Z., Xing, M., Yang, L., Bao, Z. A robust motion compensation approach for UAV SAR imagery. 2012. IEEE transactions on geoscience and remote sensing 50, no. 8: 3202-3218. DOI: 10.1109/TGRS.2011.2180392
- Chen, Y.C., Li G., Zhang Q., Zhang Q.J., Xia, X.G. Motion compensation for airborne SAR via parametric sparse representation. 2016. IEEE Transactions on Geoscience and Remote Sensing 55, no. 1: 551-562. DOI: 10.1109/TGRS.2016.2611522
- Li, R., Zeng, B., Liou, M.L. A new three-step search algorithm for block motion estimation. 1994. IEEE transactions on circuits and systems for video technology 4, no. 4: 438-442. DOI: 10.1109/76.313138
Details
Primary Language
English
Subjects
Engineering
Journal Section
Research Article
Authors
Publication Date
September 22, 2020
Submission Date
September 24, 2019
Acceptance Date
May 10, 2020
Published in Issue
Year 2020 Volume: 22 Number: 66