Depth map coding with elastic contours and 3D surface prediction

Marco Calemme (1) , Pietro Zanuttigh (2) , Simone Milani (2) , Marco Cagnazzo (3) , Beatrice Pesquet-Popescu (3)

1 Télécom ParisTech
2 Unipd - Università degli Studi di Padova = University of Padua
3 LTCI - Laboratoire Traitement et Communication de l'Information

Depth maps are typically made of smooth regions separated by sharp edges. Following this rationale, this paper presents a novel coding scheme where the depth data is represented by a set of contours defining the various regions together with a compact representation of the values inside each region. A novel coding scheme based on elastic curves allows to compactly represent the contours exploiting also the temporal consistency in different frames. A 3D surface prediction algorithm is then exploited in order to obtain an accurate estimation of the depth field from the contours and a subsampled version of the data. Finally, an ad-hoc coding strategy for the low resolution data and the prediction residuals is presented. Experimental results prove how the proposed approach is able to obtain a very high coding efficiency outperforming the HEVC coder at medium-low bitrates.

Mots clés: Depth Maps; Contour Coding; Elastic Deformation; Segmentation; HEVC

Domaines: Multimédia [cs.MM]; Traitement du signal et de l'image [eess.SP]

Marco Calemme, Pietro Zanuttigh, Simone Milani, Marco Cagnazzo, Beatrice Pesquet-Popescu. Depth map coding with elastic contours and 3D surface prediction. ICIP 2016, Sep 2016, Phoenix, United States. pp.1106 - 1110, ⟨10.1109/ICIP.2016.7532529⟩. ⟨hal-01423657⟩