論文

査読有り
2017年10月

Non-separable four-dimensional integer wavelet transform with reduced rounding noise

SIGNAL PROCESSING-IMAGE COMMUNICATION
  • Fairoza Amira Binti Hamzah
  • ,
  • Taichi Yoshida
  • ,
  • Masahiro Iwahashi

58
開始ページ
123
終了ページ
133
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.image.2017.07.003
出版者・発行元
ELSEVIER SCIENCE BV

Since few decades ago, Discrete Cosine Transform (DCT) based digital image signal compression had been adopted as the JPEG international standard. Later, Wavelet Transform (WT) has replaced the DCT and its being applied in medical image compression. JPEG 2000, the international standardization of WT is using separable lifting structure where the multidimensional image signal is transformed separately in its horizontal and vertical direction. Besides that, each process is realized by cascading in lifting calculation. However, the necessity of waiting for previous step before calculating to the next step will make the overall delay time become longer. The delay time between input and output of WT is reduced as the proposed method reduces its lifting steps. Since the lifting step contains a rounding operation, variance of the rounding noise generated due to the rounding operation inside the transform is reduced. In this paper, unlike the conventional separable structure, the proposed non-separable structure reduces the rounding noise inside the transform, which will lead to the increasing, of coding performance. The proposed wavelet transform has a merit that its output signal, apart from the rounding noise, is exactly the same as the conventional separable structure which is a cascade of 1D structure. As a result of experiments, it was observed that the proposed method reduces the rounding noise as well as increases the performance of data compression of various 4D input signals. (C) 2017 Elsevier B.V. All rights reserved.

Web of Science ® 被引用回数 : 1

リンク情報
DOI
https://doi.org/10.1016/j.image.2017.07.003
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000413176300012&DestApp=WOS_CPL
URL
http://www.scopus.com/inward/record.url?eid=2-s2.0-85026761404&partnerID=MN8TOARS
URL
http://orcid.org/0000-0002-2554-2709
ID情報
  • DOI : 10.1016/j.image.2017.07.003
  • ISSN : 0923-5965
  • eISSN : 1879-2677
  • DBLP ID : journals/spic/HamzahYI17
  • ORCIDのPut Code : 38210941
  • SCOPUS ID : 85026761404
  • Web of Science ID : WOS:000413176300012

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