Name
Title | ||
|---|---|---|
Simultaneous 3-D motion estimation and wire-frame model adaptation including photometric effects for knowledge-based video coding |
Abstract | ||
|---|---|---|
We address the problem of 3-D motion estimation in the context of knowledge-based coding of facial image sequences. The proposed method handles the global and local motion estimation and the adaptation of a generic wire-frame to a particular speaker simultaneously within an optical flow based framework including the photometric effects of motion. We use a flexible wire-frame model whose local structure is characterized by the normal vectors of the patches which are related to the coordinates of the nodes. Geometrical constraints that describe the propagation of the movement of the nodes are introduced, which are then efficiently utilized to reduce the number of independent structure parameters. A stochastic relaxation algorithm has been used to determine optimum global motion estimates and the parameters describing the structure of the wire-frame model. For the initialization of the motion and structure parameters, a modified feature based algorithm is used. Experimental results with simulated facial image sequences are given |
Year | DOI | Venue |
|---|---|---|
1994 | 10.1109/ICASSP.1994.389400 | Acoustics, Speech, and Signal Processing, 1994. ICASSP-94., 1994 IEEE International Conference |
Keywords | Field | DocType |
image sequences,knowledge based systems,motion estimation,stochastic processes,video coding,3-D motion estimation,experimental results,facial image sequences,geometrical constraints,knowledge-based video coding,local structure,modified feature based algorithm,optical flow,optimum global motion estimates,photometric effects,simulated facial image sequences,stochastic relaxation algorithm,structure parameters,wire-frame model adaptation | Structure from motion,Computer vision,Mathematical optimization,Quarter-pixel motion,Motion field,Computer science,Wire-frame model,Stochastic process,Artificial intelligence,Motion estimation,Initialization,Optical flow | Conference |
Volume | ISSN | ISBN |
v | 1520-6149 | 0-7803-1775-0 |
Citations | PageRank | References |
2 | 0.81 | 4 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Gozde Bozdagi | 1 | 25 | 4.10 |
| A. Murat Tekalp | 2 | 2603 | 278.04 |
| Levent Onural | 3 | 110 | 16.83 |