Title :
An object-oriented video codec based on region growing motion segmentation
Author :
Yemez, Y. ; Sankur, B. ; Anarim, E.
Author_Institution :
Dept. of Electr. & Electron. Eng., Bogazici Univ., Istanbul, Turkey
Abstract :
An object-oriented codec for video transmission at very low bit rates is proposed. The object motion is modeled by quadratic transform for which the coefficients are estimated by the nonlinear quasi-Newton method. The segmentation problem is put forward as a constrained optimization problem which interacts with the motion estimation process in the course of region growing. A context-based shape coding method which takes into account the image synthesis error as well as the geometric distortion, is also proposed. Quantitative and subjective performance results of the codec on various test sequences are included
Keywords :
Newton method; coding errors; image segmentation; image sequences; motion estimation; optimisation; transform coding; video codecs; video coding; coefficients; constrained optimization problem; context-based shape coding method; geometric distortion; image synthesis error; motion estimation; nonlinear quasi-Newton method; object motion; object-oriented video codec; quadratic transform; quantitative performance results; region growing motion segmentation; subjective performance; test sequences; very low bit rates; video transmission; Bit rate; Constraint optimization; Image coding; Image generation; Image segmentation; Motion estimation; Nonlinear distortion; Object oriented modeling; Shape; Video codecs;
Conference_Titel :
Image Processing, 1997. Proceedings., International Conference on
Conference_Location :
Santa Barbara, CA
Print_ISBN :
0-8186-8183-7
DOI :
10.1109/ICIP.1997.632152
