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

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2 Author(s)
Alatan, A.A. ; Dept. of Electr. & Electron. Eng., Bilkent Univ., Ankara, Turkey ; Onural, L.

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

Published in:

Image Processing, IEEE Transactions on  (Volume:7 ,  Issue: 6 )

Date of Publication:

Jun 1998

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