Estimation of depth fields suitable for video compression based on 3-D structure and motion of objects

Date

1998-6

Author

Alatan, Abdullah Aydın
Onural, L.

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Intensity prediction along motion trajectories removes temporal redundancy considerably in video compression algorithms. In three-dimensional (3-D) object-based video coding, both 3-D motion and depth values are required for temporal prediction. The required 3-D motion parameters for each object are found by the correspondence-based E-matrix method. The estimation of the correspondences-two-dimensional (2-D) motion field-between the frames and segmentation of the scene into objects are achieved simultaneously by minimizing a Gibbs energy. The depth field is estimated by jointly minimizing a defined distortion and bit-rate criterion using the 3-D motion parameters. The resulting depth field is efficient in the rate-distortion sense, Bit-rate values corresponding to the lossless encoding of the resultant depth fields are obtained using predictive coding; prediction errors are encoded by a Lempel-Ziv algorithm. The results are satisfactory for real-life video scenes.

Subject Keywords

Dense depth estimation, Depth encoding, Motion analysis, Object-based video coding, Rate-distortion theory, 3-D motion, 3-D structure

URI

https://hdl.handle.net/11511/28567

Collections

Department of Electrical and Electronics Engineering, Article