Analysis of Depth Map Resampling Filters for Depth-based 3D Video Coding

Depth map images are characterized by large homogeneous areas and strong edges. It has been observed that efficient compression of the depth map is achieved by applying a down-sampling operation prior to encoding. However, since high resolution depth maps are also needed for depth-based 3D coding tools, such as view synthesis prediction, an upsampling method that is able to recover the loss of information is needed within this coding framework. In this paper, we analyze the impact of depth resampling on view synthesis quality and its interaction with other 3D coding tools, and propose an optimized combination of downand up-sampling techniques for overall coding performance improvement. View synthesis with the resampled depth maps show the efficiency of our approach. Conference on Telecommunications (Conftele) This work may not be copied or reproduced in whole or in part for any commercial purpose. Permission to copy in whole or in part without payment of fee is granted for nonprofit educational and research purposes provided that all such whole or partial copies include the following: a notice that such copying is by permission of Mitsubishi Electric Research Laboratories, Inc.; an acknowledgment of the authors and individual contributions to the work; and all applicable portions of the copyright notice. Copying, reproduction, or republishing for any other purpose shall require a license with payment of fee to Mitsubishi Electric Research Laboratories, Inc. All rights reserved. Copyright c ©Mitsubishi Electric Research Laboratories, Inc., 2013 201 Broadway, Cambridge, Massachusetts 02139