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检索条件"主题词=image and video coding"
279 条 记 录,以下是191-200 订阅
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Improved hiding data in images by optimal moderately-significant-bit replacement
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ELECTRONICS LETTERS 2001年 第16期37卷 1017-1018页
作者: Chan, CK Cheng, LM City Univ Hong Kong Dept Elect Engn Hong Kong Hong Kong Peoples R China
An improved data hiding technique by optimal moderately-significant-bit replacement is presented, which can significantly reduce the computational cost and enhance the visual quality of the resulting stego-image.
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Signal-dependent wavelet transform and application to lossless image compression
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ELECTRONICS LETTERS 2002年 第4期38卷 170-172页
作者: Yoo, H Joeng, J Hanyang Univ Dept Elect Commun Engn Seoul 133791 South Korea
A signal-dependent wavelet transform based on the lifting scheme is proposed. The transform can be made reversible (i.e. an integer-to-integer transform). The reversible transform. followed by arithmetic coding, is ap... 详细信息
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Lossless image compression using ordered binary-decision diagrams
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ELECTRONICS LETTERS 2001年 第3期37卷 162-163页
作者: Mateu-Villarroya, P Prades-Nebot, J Univ Politecn Valencia Dept Comun ETSITV Valencia 46022 Spain
A lossless compression algorithm for images based on ordered binary-decision diagrams (OBDDs) is presented. The algorithm finds an OBDD which represents the image exactly and then codes the OBDD efficiently. The resul... 详细信息
来源: 评论
VQ-based digital image watermarking method
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ELECTRONICS LETTERS 2000年 第14期36卷 1201-1202页
作者: Lu, ZM Pan, JS Sun, SH Harbin Inst Technol Dept Automat Test & Control Harbin 150006 Peoples R China Natl Kaohsiung Inst Technol Dept Elect Engn Kaohsiung 80782 Taiwan
A vector-quantisation (VQ)-based watermarking method is presented which utilises the codebook expansion technique. This method is efficient, provides enhanced security and the watermarked image is robust against the e... 详细信息
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Wavelet coding method using small block DCT
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ELECTRONICS LETTERS 2001年 第10期37卷 627-629页
作者: Wang, J Zhang, WJ Yu, SY Shanghai Jiao Tong Univ Inst Image Commun & Informat Proc Shanghai 200030 Peoples R China
A novel wavelet image compression method is introduced. The method applies the small block discrete cosine transform to certain parts of the wavelet coefficients before quantisation and coding. Experiments show that t... 详细信息
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Technique for designing biorthogonal wavelet filters with an application to image compression
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ELECTRONICS LETTERS 1999年 第18期35卷 1530-1532页
作者: Zhao, Y Swamy, MNS Concordia Univ Dept Elect & Comp Engn Ctr Signal Proc & Commun Montreal PQ H3G 1M8 Canada
A technique for designing new symmetric biorthogonal wavelets from a given symmetric regular filter is presented. The main idea is to find a symmetric complementary filter of a given regular filter such that it has th... 详细信息
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Bandwidth renegotiation scheme for VBR video services
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ELECTRONICS LETTERS 1999年 第18期35卷 1509-1510页
作者: Casilari, E Sandoval, F Univ Malaga Dept Tecnol Elect ETSI Telecomun E-29071 Malaga Spain
The authors show how the existence of long term variability in variable bit rate (VBR) video traffic imposes the need for bandwidth renegotiation. In particular. two simple scenarios with a fixed renegotiation interva... 详细信息
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Rate control algorithm using SOFM-based neural classifier
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ELECTRONICS LETTERS 2000年 第12期36卷 1041-1042页
作者: Park, GH Lee, YJ Yonsei Univ Dept Comp Sci Wonju 220710 Kwangwon South Korea
A neural-net based rate control algorithm for MPEG encoders is introduced. It is based on the global rate-distortion model constructed by a self-organising feature map. The performances of the proposed algorithm are b... 详细信息
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Wavelet image coding based on significance extraction using morphological operations
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IEE PROCEEDINGS-VISION image AND SIGNAL PROCESSING 1999年 第4期146卷 206-210页
作者: Zhong, JM Leung, CH Tang, YY Univ Hong Kong Dept Elect & Elect Engn Hong Kong Hong Kong Peoples R China
An algorithm is proposed for improving Servetto et al.'s method of morphological representation of wavelet data (MRWD), which is among the most efficient wavelet-based image compression algorithms. In MRWD, morpho... 详细信息
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Optimal vertex adjustment method using a Viterbi algorithm for vertex-based shape coding
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ELECTRONICS LETTERS 1999年 第9期35卷 706-707页
作者: Lee, JH Chung, JW Kim, JK Korea Adv Inst Sci & Technol Dept Elect Engn Taejon 305701 South Korea Hyundai Elect Ind Co Ltd Informat & Telecommun R&D Ctr Seoul 137070 South Korea
An optimal vertex adjustment method is presented for vertex-based shape coding. The method optimally shifts the vertices, selected by a conventional vertex selection method, within the window that satisfies the allowa... 详细信息
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