Locally-accurate motion estimation for object-based video coding
UNSPECIFIED (1997) Locally-accurate motion estimation for object-based video coding. In: Visual Communications and Image Processing 1998 Conference, SAN JOSE, CA, JAN 28-30, 1998. Published in: VISUAL COMMUNICATIONS AND IMAGE PROCESSING '98, PTS 1 AND 2, 3309 pp. 306-316.Full text not available from this repository.
We describe new motion coding algorithms that develop Fixed Size Block Matching (FSBM) into Variable Sized Block Matching (VSBM) and a modified approach (MVSBM) which can exploit irregularly shaped areas of uniform motion. New generations of video coding standards handle arbitrary shaped visual objects as well as frame based input. We explain how MVSBM strategies work when combining shaped data and block based algorithms. Locally accurate motion information is produced by the combination of otherwise ambiguous estimates produced by the small area matching required to detect locally diverse movements. The success of various prediction strategies indicates that the motion information is well behaved and thus likely to be accurate, given complex natural image sequence source material. MVSBM is evaluated by forcing it to perform with the same quality prediction as FSBM, then comparing the number of bits required by each technique. FSBM vector coding methods are taken from H.263 and MPEG-4 for comparison with those developed for MVSBM, extra compression phases are developed for MVSBM by utilising the greater structure of the representation. Results are presented for three MEPG-4 test sequences, "Container", "Weather" and "Stefan". We show bir saving of 67% bits fur "Container", and 13% for "Stefan" with more complex object activity.
|Item Type:||Conference Item (UNSPECIFIED)|
|Subjects:||Q Science > QC Physics|
|Series Name:||PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE)|
|Journal or Publication Title:||VISUAL COMMUNICATIONS AND IMAGE PROCESSING '98, PTS 1 AND 2|
|Publisher:||SPIE-INT SOC OPTICAL ENGINEERING|
|Editor:||Rajala, SA and Rabbani, M|
|Number of Pages:||11|
|Page Range:||pp. 306-316|
|Title of Event:||Visual Communications and Image Processing 1998 Conference|
|Location of Event:||SAN JOSE, CA|
|Date(s) of Event:||JAN 28-30, 1998|
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