Journal article
High performance, low-complexity line-based motion estimation algorithm with smoothing and preprocessing
International Journal of Pattern Recognition and Artificial Intelligence, Vol.23(1), pp.101-114
2009
Abstract
This paper introduces a smoothing and preprocessing (S+P) technique for a line-based one-bit-transform (1BT) motion estimation scheme. In the proposed algorithm, a smoothing threshold (ThresholdS) is incorporated into the 1BT convolutional kernel. By using the smoothing threshold, scattering noise which is a common problem in most 1BT images can be greatly reduced. After the transformation, the 1BT images for the current and reference frames are divided into a number of macroblocks. The macroblock in the current frame is first compared with the macroblock at the same position in the reference frame. If the Sum of Absolute Difference (SAD) is below a certain preprocessing threshold (ThresholdP), the macroblock in the current frame is considered to have negligible movement and motion search is not performed. Simulation results show that this technique achieves high performance and greatly reduces the number of search operations. By incorporating the S+P technique, the PSNR achieved by the 1BT is approaches the performance of the 8-bit Full Search Block Matching Algorithm (FSBMA), and the difference is as low as 0.08 dB. In addition, this technique outperforms current state-of-the-art 1BT motion estimation techniques. An improvement in PSNR performance by up to 0.6 dB and a reduction in the number of search operations by 60% to 93% is achieved using video conferencing sequences.
Details
- Title
- High performance, low-complexity line-based motion estimation algorithm with smoothing and preprocessing
- Authors
- L W Chew (Author) - University of NottinghamW C Chia (Author) - University of NottinghamLi-Minn Ang (Author) - University of NottinghamK P Seng (Author) - University of Nottingham
- Publication details
- International Journal of Pattern Recognition and Artificial Intelligence, Vol.23(1), pp.101-114
- Publisher
- World Scientific Publishing Co. Pte. Ltd.
- Date published
- 2009
- DOI
- 10.1142/S0218001409006990
- ISSN
- 0218-0014; 0218-0014
- Organisation Unit
- University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering; Engage Research Lab
- Language
- English
- Record Identifier
- 99513799002621
- Output Type
- Journal article
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- Web Of Science research areas
- Computer Science, Artificial Intelligence