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Optical Engineering • Open Access

Edge-preserving down/upsampling for depth map compression in high-efficiency video coding
Author(s): Huiping Deng; Li Yu; Juntao Zhang; Bin Feng; Qiong Liu

Paper Abstract

An efficient down/upsampling method to compress a depth map efficiently within the high-efficiency video coding (HEVC) framework is presented. A different edge-preserving depth upsampling method is proposed by using both the texture and depth information. We take into account the edge similarity between depth maps and their corresponding texture images as well as the structural similarity among depth maps to build a weight model. Based on the weight model, the optimal minimum mean square error upsampling coefficients are estimated from the local covariance coefficients of the downsampled depth map. The upsampling filter is combined with HEVC to increase coding efficiency. The objective results demonstrate that we achieve a maximum bit rate saving of 32.2% compared to full resolution method and 27.6% compared to a competing depth down/upsampling method on depth bit rate. The subjective evaluation showed that our proposed method achieves better quality in synthesized views than existing methods do.

Paper Details

Date Published: 17 July 2013
PDF: 9 pages
Opt. Eng. 52(7) 071509 doi: 10.1117/1.OE.52.7.071509
Published in: Optical Engineering Volume 52, Issue 7
Show Author Affiliations
Huiping Deng, Wuhan Univ. of Science and Technology (China)
Li Yu, Huazhong Univ. of Science and Technology (China)
Juntao Zhang, Huazhong Univ. of Science and Technology (China)
Bin Feng, Huazhong Univ. of Science and Technology (China)
Qiong Liu, Huazhong Univ. of Science and Technology (China)

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