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检索条件"主题词=Image and video coding"
281 条 记 录,以下是171-180 订阅
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Multifidelity JPEG based compression of images using variable quantisation
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ELECTRONICS LETTERS 2001年 第7期37卷 423-424页
作者: Golner, MA Mikhael, WB Krishnan, V Univ Cent Florida Sch Elect Engn & Comp Sci Orlando FL 32816 USA
In image processing applications. certain regions in an image may be of greater interest to the user. For these types of applications a multifidelity region based variable quantisation scheme is proposed. The resultin... 详细信息
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Transmission diversity for JPEG 2000
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ELECTRONICS LETTERS 2001年 第23期37卷 1383-1384页
作者: Emami, S Motorola Labs Boynton Beach FL 33426 USA
A scheme for improving the performance of JPEG 2000 over noisy channels is presented. The detailed operation of the decoder based on a set of rules is provided. It is observed that the worst-case peak signal-to-noise ... 详细信息
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Polar co-ordinates shape adaptive discrete transform-based watermarking scheme for arbitrarily-shaped object
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ELECTRONICS LETTERS 2001年 第22期37卷 1330-1331页
作者: Ko, YH Kim, SD Korea Adv Inst Sci & Technol Dept Elect Engn & Comp Sci Div Elect Engn Yusong Gu Taejon 305701 South Korea
A new watermarking scheme for arbitrarily-shaped image is proposed, Using co-ordinate's conversion to log-polar and polar co-ordinates shape adaptive discrete transform (PSADT). the proposed watermarking method ca... 详细信息
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Programmable processor for on-line computing of inverse Haar transform
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ELECTRONICS LETTERS 2001年 第16期37卷 1050-1052页
作者: Martín, O Solana, JM Univ Cantabria Fac Ciencias Dept Elect & Computadores E-39005 Santander Spain
A processor for the one-dimensional inverse Haar transform (1D-IFHT) programmable for N = 8 up to N = 1024, with low latency data flow is presented. It enables on-line computing of both the normalised and the non-norm... 详细信息
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Motion estimation using low-bit oriented edge image for DCT-based video compression
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ELECTRONICS LETTERS 2001年 第8期37卷 494-495页
作者: Qiu, XH Zhang, WJ Chen, HY Zhou, R Tsing Hua Univ Inst Microelect Beijing 100084 Peoples R China
A novel block-based motion estimation algorithm using a low-bit resolution oriented edge image (LROEI) is proposed. The algorithm produces difference blocks with little texture for DCT coding and enhances the encoding... 详细信息
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Efficient method for early detection of all-zero DCT coefficients
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ELECTRONICS LETTERS 2001年 第3期37卷 160-161页
作者: Jun, S Yu, SY Shanghai Jiao Tong Univ Inst Image Commun & Informat Proc Shanghai 200030 Peoples R China
Based on the existing method, a more efficient algorithm for detecting all-zero DCT coefficient blocks before implementation of the discrete cosine transform and quantisation in very low bit rare video coding is propo... 详细信息
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Scene change detection algorithms for content-based video indexing and retrieval
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ELECTRONICS & COMMUNICATION ENGINEERING JOURNAL 2001年 第3期13卷 117-126页
作者: Fernando, WAC Canagarajah, CN Bull, DR Asian Inst Technol Sch Adv Technol Klongluang 12120 Thailand Univ Bristol Image Commun Grp Bristol BS8 1UB Avon England Univ Bristol Ctr Commun Res Bristol BS8 1TH Avon England
There is an urgent need to extract key information from video automatically for the purposes of indexing, fast retrieval, and scene analysis. To support this vision, reliable scene change detection algorithms must be ... 详细信息
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Policing method for Markovian traffic descriptors of VBR MPEG sources over ATM networks
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IEE PROCEEDINGS-COMMUNICATIONS 2001年 第2期148卷 70-76页
作者: Yoo, SJ Kim, SD Inha Univ Grad Sch Informat Technol & Telecommun Inchon 402751 South Korea Korea Adv Inst Sci & Technol Dept Elect Engn Taejon 305701 South Korea
An efficient policing mechanism for Markov model-based traffic descriptors of VBR MPEG video traffic is proposed. A VBR video sequence is described by a set of traffic descriptors using a scene-based Markov model for ... 详细信息
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Vertex adjustment method using geometric constraint for polygon-based shape coding
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ELECTRONICS LETTERS 2001年 第12期37卷 754-755页
作者: Yun, BJ Lee, SW Kim, SD Korea Adv Inst Sci & Technol Dept Elect Engn & Comp Sci Div Elect Engn Yusong Gu Taejon 305701 South Korea Hanbat Natl Univ Div Informat Commun & Comp Engn Yusong Gu Taejon 305719 South Korea
A new vertex selection scheme for polygon-based contour coding is proposed. The proposed method consists of 'two-step procedure'. Initial vertices are selected by using the conventional iterated refinement met... 详细信息
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Gradient-based predictor for diagonal edge pixels in JPEG-LS
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ELECTRONICS LETTERS 2001年 第22期37卷 1327-1328页
作者: Edirisinghe, EA Bedi, S Loughborough Univ Technol Dept Comp Sci Loughborough LE11 3TU Leics England
JPEG-LS predictors have been optimised for the accurate prediction of pixels in the locality of horizontal/vertical edges. Here a low cost technique that accurately predicts the values of pixels along diagonal edges i... 详细信息
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