NDLI: Adaptive decision on the priority of horizontal or vertical direction for the SA-DCT

Content Provider	IEEE Xplore Digital Library
Author	Freitas, F.M. Alcaim, A.
Copyright Year	2006
Description	Author affiliation: Pontifical Catholic Univ. of Minas Gerais, Gerais (Freitas, F.M.)
Abstract	SA-DCT has shown excellent results for image compression at medium and high bit rates. Moreover, the decision on the direction of the first ID-processing of the SA-DCT influences the overall coding performance. Some methods for selecting this preferential direction are based on shape information only and the isolated use of any of them is not always able to outperform the other ones. A more efficient scheme, which is based on a trade-off between quality and rate has been proposed, but it is computationally too heavy. This paper introduces a novel scheme that uses a morphological feature to adaptively choose the best strategy (among three different ones) to determine the preferential direction for the SA-DCT. It provides comparable or better performance than those schemes which use shape information only, with lower computational load than the one which is based on quality versus rate.
Starting Page	844
Ending Page	849
File Size	481252
Page Count	6
File Format	PDF
ISBN	9788589748049
DOI	10.1109/ITS.2006.4433389
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-09-03
Publisher Place	Brazil
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Image coding Bit rate Shape Discrete cosine transforms Encoding Image processing Software libraries Multimedia systems Transform coding MPEG 4 Standard morphological feature SA-DCT object-oriented image coding
Content Type	Text
Resource Type	Article

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