VQ Codebook Searching Algorithm Based on Correlation Property
Fundamenta Informaticae
Prediction-based directional search for fast block-matching motion estimation
Proceedings of the 2010 Symposium on Information and Communication Technology
EURASIP Journal on Advances in Signal Processing
Expert Systems with Applications: An International Journal
Motion compensation based on tangent distance prediction for video compression
Image Communication
An improved motion vector prediction scheme for video coding
PCM'06 Proceedings of the 7th Pacific Rim conference on Advances in Multimedia Information Processing
Fast motion estimation using spatio-temporal correlations
ICAT'06 Proceedings of the 16th international conference on Advances in Artificial Reality and Tele-Existence
Real time head tracking via camera saccade and shape-fitting
ICIAR'05 Proceedings of the Second international conference on Image Analysis and Recognition
Image stabilization based on harris corners and optical flow
KSEM'11 Proceedings of the 5th international conference on Knowledge Science, Engineering and Management
VQ Codebook Searching Algorithm Based on Correlation Property
Fundamenta Informaticae
Hi-index | 0.00 |
In most block-based video coding systems, the fast block matching algorithms (BMAs) use the origin as the initial search center, which may not track the motion very well. To improve the accuracy of the fast BMAs, a new adaptive motion tracking search algorithm is proposed. Based on the spatial correlation of motion blocks, a predicted starting search point, which reflects the motion trend of the current block, is adaptively chosen. This predicted search center is found closer to the global minimum, and thus the center-biased BMAs can be used to find the motion vector more efficiently. Experimental results show that the proposed algorithm enhances the accuracy of the fast center-biased BMAs, such as the new three-step search, the four-step search, and the block-based gradient descent search, as well as reduces their computational requirement