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Object oriented motion estimation by sliced-block matching algorithm

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2 Author(s)
Guaragnella, C. ; Dipt. di Elettrotecnica ed Elettronica, Politecnico di Bari, Italy ; Di Sciascio, E.

An algorithm for object-oriented motion estimation is presented. The algorithm initially determines a macro-block partition on the basis of the computed current frame difference, using the hidden information that a foreground moving object produces high absolute frame difference values in the neighborhood of the object boundaries. An inter-frame coding algorithm, adopting a modified version of classical block matching is then applied on separate slices of each macro-block. Resulting data are used to obtain a preliminary object segmentation. The algorithm further splits each macro-block if characterized by the presence of more than one motion vector into sub-areas. The approach allows us to obtain a global object segmentation-with the possibility of tracking-and lower prediction errors with respect to classical block matching, without increasing the computational complexity

Published in:

Pattern Recognition, 2000. Proceedings. 15th International Conference on  (Volume:3 )

Date of Conference:

2000

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