Compression and transmission of depth maps for image-basedrendering
Krishnamurthy, R.
Bing-Bing Chai
Hai Tao
Sethuraman, S.
Sarnoff Corp., Princeton, NJ;
This paper appears in: Image Processing, 2001. Proceedings. 2001 International Conference on
Publication Date: 2001
Volume: 3,
On page(s): 828-831 vol.3
Meeting Date: 10/07/2001 - 10/10/2001
Location: Thessaloniki, Greece
ISBN: 0-7803-6725-1
References Cited: 10
INSPEC Accession Number: 7230935
Digital Object Identifier: 10.1109/ICIP.2001.958248
Current Version Published: 2002-08-07
Abstract
We consider applications using depth-based image-based rendering
(IBR), where the synthesis of arbitrary views occur at a remote
location, necessitating the compression and transmission of depth maps.
Traditional image compression has been designed to provide maximum
perceived visual quality, and a direct application is sub-optimal for
depth-map compression, since depth-maps are not directly viewed. In
other words, the sensitivity of the rendering error depends on the image
content as well as on the depth map, we propose two improvements to take
this into account. Firstly, we consider region-of-interest (ROI) coding,
where we identify those regions of the image where accurate depth is
most crucial. Secondly, we reshape the dynamic range of the depth map.
Our experiments show a significant improvement in coding gain (1.1 dB)
and rendering quality when we integrated these two improvements into a
standard JPEG-2000 coder
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