NDLI: Lossy and near-lossless compression of depth images using segmentation into constrained regions

Content Provider	IEEE Xplore Digital Library
Author	Schiopu, I. Tabus, I.
Copyright Year	2012
Description	Author affiliation: Department of Signal Processing, Tampere University of Technology, P.O. Box 553, FIN-33101 Tampere, Finland (Schiopu, I.; Tabus, I.)
Abstract	This paper presents a lossy coding method for depth images using a segmentation constructed by selecting regions of pixels having the depth values obeying constraints defined in terms of some bounds, which are tuned in order to obtain the target distortion. The contours describing the segmentation are transmitted using an efficient chain coding method and are thus available also at the decoder for the next stage, which is region based predictive coding with a tunable precision level. The rate comprises the cost of losslessly transmission of the contours and the cost of transmitting the residuals with the decided precision, which is the main factor influencing the distortion. We introduce a procedure optimizing the parameters involved in the segmentation and in the prediction for a given image. As a side result, the segmentations residing on the convex hull of the RD curve can be seen as optimal segmentations with various granularity.
Starting Page	1099
Ending Page	1103
File Size	284249
Page Count	5
File Format	PDF
ISBN	9781467310680
ISSN	20761465
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-08-27
Publisher Place	Romania
Access Restriction	Subscribed
Rights Holder	EURASIP
Subject Keyword	Lossy compression Image segmentation Depth image Image coding Near-lossless compression Segmentation Bit rate Rate-distortion Quantization Encoding Decoding Image reconstruction
Content Type	Text
Resource Type	Article

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