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


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Alatan A. A. , Onural L.

IEEE TRANSACTIONS ON IMAGE PROCESSING, cilt.7, sa.6, ss.904-908, 1998 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Yayın Türü: Makale / Kısa Makale
  • Cilt numarası: 7 Konu: 6
  • Basım Tarihi: 1998
  • Doi Numarası: 10.1109/83.679440
  • Dergi Adı: IEEE TRANSACTIONS ON IMAGE PROCESSING
  • Sayfa Sayıları: ss.904-908

Özet

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.