Fractal Image Compression Using Pyramids
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Fractal Image Compression Using Pyramids
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Author : Huawu Lin
language : en
Publisher:
Release Date : 1997
Fractal Image Compression Using Pyramids written by Huawu Lin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
Fractal image compression is an attractive technique for image coding because of its distinct features and the low bit-rate requirement. In this research, several techniques are introduced to improve the compression performance. Fractal image compression is based on the self-similarity search of the image. The encoding process is computationally intensive. In this thesis, a pyramidal framework is proposed to reduce the encoding complexity. The encoding complexity is reduced by as much as two orders of magnitude. Because the domain-range matching is independent, parallel methods are proposed to further speed up the encoding process. As with any lossy compression schemes, one of the challenges is either to maximize the image quality at a fixed bit rate, or to minimize the rate required for a given quality. To fulfil this purpose, the constant contractive factor in conventional fractal image compression is extended to the case of nonlinear contractive functions, which lead to significantly better reconstructed images and faster decoding than the conventional fractal method. Furthermore, as digital images and video products are designed for human viewing, human visual system (HVS) models are exploited to faithfully reproduce perceptually important information and eliminate the information that the visual system cannot perceive. Based on the human visual system's nonlinear response to luminance and the visual masking effects, a perceptually appropriate metric is defined. The psychophysical raw data on the visual contrast threshold is first interpolated as a function of background luminance and visual angle, and is then used as an error upper bound for perceptually based fractal image compression. The perceptually based method produces visually better reconstructed images than the conventional method and the JPEG standard. To reduce the domain search complexity, the pyramidal search method is also extended for perceptually based fractal image compression. Practical fractal image compression is a block coding. At very low bit rates, fractal method encoded images may exhibit blocking artifacts. Based on the Laplacian pyramidal representation of the image, the thesis presents a general post-processing method to remove the blocking effects.
Fractal Image Compression Using Pyramids
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Author :
language : en
Publisher:
Release Date : 1997
Fractal Image Compression Using Pyramids written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
Fractal Image Compression
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Author : Yuval Fisher
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Fractal Image Compression written by Yuval Fisher and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Mathematics categories.
One half of the book is authored by Yuval Fisher himself, while articles from another 12 experts in the field present material from different points of view. The focus here is solely on fractal image encoding, with the aim of providing a working code that is usable in applications, while containing the complete details of how to encode and decode images. An indispensable "how to" guide, combining the very latest results in the field. Of interest to a very wide audience, ranging from experts in image processing to high school students.
Fractal And Wavelet Image Compression Techniques
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Author : Stephen T. Welstead
language : en
Publisher: SPIE Press
Release Date : 1999
Fractal And Wavelet Image Compression Techniques written by Stephen T. Welstead and has been published by SPIE Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Technology & Engineering categories.
Interest in image compression for internet and other multimedia applications has spurred research into compression techniques that will increase storage capabilities and transmission speed. This tutorial provides a practical guide to fractal and wavelet approaches--two techniques with exciting potential. It is intended for scientists, engineers, researchers, and students. It provides both introductory information and implementation details. Three Windows-compatible software systems are included so that readers can explore the new technologies in depth. Complete C/C++ source code is provided, enabling readers to go beyond the accompanying software. The mathematical presentation is accessible to advanced undergraduate or beginning graduate students in technical fields.
Fractal Image Compression
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Author : Michael Barnsley
language : en
Publisher: A K Peters/CRC Press
Release Date : 1993-01-18
Fractal Image Compression written by Michael Barnsley and has been published by A K Peters/CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993-01-18 with Computers categories.
Fractal Image Compression Using Hierarchical And Region Based Transformation
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Author : Lester Clive Thomas
language : en
Publisher:
Release Date : 1994
Fractal Image Compression Using Hierarchical And Region Based Transformation written by Lester Clive Thomas and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
An Algorithm For Fractal Image Compression Using Fuzzy Logic
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Author : Tanasanee Phienthrakul
language : en
Publisher:
Release Date : 2003
An Algorithm For Fractal Image Compression Using Fuzzy Logic written by Tanasanee Phienthrakul and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Algorithms categories.
Fractal Image Compression Using Triangulations
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Author :
language : en
Publisher:
Release Date : 1996
Fractal Image Compression Using Triangulations written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with categories.
Fractal Image Compression Using Hierarchical And Region Based Transformations
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Author : Lester C. Thomas
language : en
Publisher:
Release Date : 1993
Fractal Image Compression Using Hierarchical And Region Based Transformations written by Lester C. Thomas and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Data compression categories.
Fractal Image Compression Using Hierarchical And Region Based Transformations
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Author : Lester C. Thomas
language : en
Publisher:
Release Date : 1993
Fractal Image Compression Using Hierarchical And Region Based Transformations written by Lester C. Thomas and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Data compression categories.