Proceedings ArticleDOI
Global motion estimation and robust regression for video coding
Kui Zhang,J. Kittler +1 more
- Vol. 5, pp 2589-2592
TLDR
A global motion estimation algorithm based on the Taylor expansion equation and robust regression technique using probabilistic thresholding is proposed that can improve both the coding efficiency and the quality of motion compensation on sequences involving camera movement.Abstract:
In the H.263 Version 2 (H.263+) coding standard, the global motion compensation can be introduced by using Reference Picture Resampling (Annex. P) syntax. Such an application requires that the global motion parameters be estimated automatically. We propose a global motion estimation algorithm based on the Taylor expansion equation and robust regression technique using probabilistic thresholding. The experimental results confirm that the proposed algorithm can improve both the coding efficiency and the quality of motion compensation on sequences involving camera movement.read more
Citations
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Modeling visual attention's modulatory aftereffects on visual sensitivity and quality evaluation
TL;DR: A new numerical measure for visual attention's modulatory aftereffects, perceptual quality significance map (PQSM), is proposed and demonstrates the performance improvement on two PQSM-modulated visual sensitivity models and two P QSM-based visual quality metrics.
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Video Saliency Incorporating Spatiotemporal Cues and Uncertainty Weighting
TL;DR: Experimental results show that the proposed method significantly outperforms state-of-the-art video saliency detection models.
Proceedings ArticleDOI
Three-dimensional wavelet coding of video with global motion compensation
TL;DR: This work introduces global motion compensation for 3D subband video coders, and finds 0.5 to 2 dB gain on sequences with dominant background motion.
Journal ArticleDOI
Image sequence segmentation using 3-D structure tensor and curve evolution
J. Zhang,Junbin Gao,Weisong Liu +2 more
TL;DR: A novel approach for image sequence segmentation that is computationally efficient, does not require dense-field motion estimation, and is insensitive to noise and global/background motion is described.
Patent
Automated conversion of a visual presentation into digital data format
Peter Gomez,Goethe Lindahl +1 more
TL;DR: In this paper, a full multimedia production such as a seminar, conference, lecture, etc. can be captured in real time using multiple cameras (11, 13) and can be viewed interactively within the same video display screen (31-46).
References
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Proceedings ArticleDOI
Video coding using affine motion compensated prediction
TL;DR: This paper proposes a multiple layer video codec which uses affine model for large regions to improve motion compensation and shows that the proposed method gives better results in terms of the bit rate under the same PSNR constraint for most of the tested sequences.
Proceedings ArticleDOI
Video coding using adaptive global MC and local affine MC
TL;DR: Simulation results show that the proposed coding method using two-stage MC significantly outperforms H. 263 for sequences with fast motion.
Proceedings ArticleDOI
Effective motion field description based on affine models and global motion information
Marco Barbieri,Rosa Lancini +1 more
TL;DR: Simulation results indicate that the detection and compensation of the global motion are essential for good motion filed estimation and motion compensated prediction.