NDLI: An overview of directional transforms in image coding

Content Provider	IEEE Xplore Digital Library
Author	Jizheng Xu Bing Zeng Feng Wu
Copyright Year	2010
Description	Author affiliation: Microsoft Research Asia, Beijing, China (Jizheng Xu; Feng Wu) \|\| The Hong Kong University of Science and Technology, Hong Kong SAR, China (Bing Zeng)
Abstract	Transform-based image coding has been the mainstream for many years, as witnessed in from the early effort in JPEG to the recent advances in HD Photo. Traditionally, a 2-D transform used in image coding is always implemented separately along the vertical and horizontal directions, respectively. However, it is usually true that many image blocks contain oriented structures (e.g., edges) and/or textures that do not follow either the vertical or horizontal direction. The traditional 2-D transform thus may not be the most appropriate one to these image blocks. This well-known fact has recently triggered several attempts towards the development of directional transforms so as to better preserve the directional information in an image block. Some of these directional transforms have been applied in image coding, demonstrating a significant coding gain. This paper presents an overview of these directional transforms as well as a discussion of some existing problems and their potential solutions.
Starting Page	3036
Ending Page	3039
File Size	375263
Page Count	4
File Format	PDF
ISBN	9781424453085
DOI	10.1109/ISCAS.2010.5537990
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-05-30
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Image coding Discrete cosine transforms Frequency Pixel High definition video Wavelet transforms Quantization Asia Anisotropic magnetoresistance Layout
Content Type	Text
Resource Type	Article

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