NDLI: Prototype prediction for colour update in object-based analysis-synthesis coding

Content Provider	IEEE Xplore Digital Library
Author	Wollborn, M.
Copyright Year	1991
Abstract	In an object-based analysis-synthesis coder each image of an image sequence is subdivided into arbitrarily shaped moving objects. The objects are described by three parameter sets defining their motion, shape and colour, where the colour parameters denote the luminance and chrominance values of the object surface. In order to increase the efficiency of the coder, a predictive technique for the coding of colour parameters is presented using image pattern prototypes for prediction. The prototypes are extracted from previously coded images and identically stored at the coder and the decoder. They can be used for the prediction of the colour parameters of an object by applying a suitably defined mapping function. The prediction error is coded by an adaptive combination of DCT and intraframe DPCM. For the reconstruction of the colour parameters at the decoder the address of the image pattern prototype and the parameters of the mapping function have to be transmitted as side information. Prototype prediction is only applied, when its data rate is lower than that of an extended hybrid scheme. At a transmission data rate of 61 kbit/s prototype prediction increases the PSNR by 2 dB in the areas of colour update.<>
Sponsorship	IEEE Circuits and Systems Society
Starting Page	236
Ending Page	245
Page Count	10
File Size	1332053
File Format	PDF
ISSN	10518215
Volume Number	4
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Prototypes Decoding Image analysis Image sequence analysis Image sequences Shape Image coding Discrete cosine transforms Image reconstruction PSNR
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Media Technology

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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