Scalable Coding of Depth Maps With R-D Optimized Embedding

Recent work on depth map compression has revealed the importance of incorporating a description of discontinuity boundary geometry into the compression scheme. We propose a novel compression strategy for depth maps that incorporates geometry information while achieving the goals of scalability and e...

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Bibliographic Details
Published in:IEEE transactions on image processing 2013-05, Vol.22 (5), p.1982-1995
Main Authors: Mathew, R., Taubman, D., Zanuttigh, P.
Format: Article
Language:English
Subjects:
Applied sciences
Boundaries
Coding
Coding, codes
COM-LOC
Compressing
Discontinuity
Discrete wavelet transforms
Encoding
Exact sciences and technology
Geometry
Image coding
Image processing
Information, signal and communications theory
Pyramids
Rate-distortion
Representations
Scalability
Signal and communications theory
Signal processing
TEC-MRS
Telecommunications and information theory
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Summary:Recent work on depth map compression has revealed the importance of incorporating a description of discontinuity boundary geometry into the compression scheme. We propose a novel compression strategy for depth maps that incorporates geometry information while achieving the goals of scalability and embedded representation. Our scheme involves two separate image pyramid structures, one for breakpoints and the other for sub-band samples produced by a breakpoint-adaptive transform. Breakpoints capture geometric attributes, and are amenable to scalable coding. We develop a rate-distortion optimization framework for determining the presence and precision of breakpoints in the pyramid representation. We employ a variation of the EBCOT scheme to produce embedded bit-streams for both the breakpoint and sub-band data. Compared to JPEG 2000, our proposed scheme enables the same the scalability features while achieving substantially improved rate-distortion performance at the higher bit-rate range and comparable performance at the lower rates.
ISSN:1057-7149
1941-0042
DOI:10.1109/TIP.2013.2240007