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A Wavelet Fractal Method for Content Based Image and Video Compression

1997
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Release : 1997
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Kind : eBook
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Book Synopsis A Wavelet Fractal Method for Content Based Image and Video Compression by : Robert J. Bonneau

Download or read book A Wavelet Fractal Method for Content Based Image and Video Compression written by Robert J. Bonneau. This book was released on 1997. Available in PDF, EPUB and Kindle. Book excerpt: Traditional methods of image and video coding rely on linear transformations that focus primarily on high compression. With the increasing demand for digital imagery and video there is now a need for functionality of the compressed information. This dissertation develops a new framework for compression that uses a fractal wavelet method to break the imagery into shape, texture, color, and motion. With this new organization, image information is readily accessible to the user in compressed form. Based on this compression method, we then develop an object-oriented video format. Image analysts tend to break imagery into the categories of shape, texture, color, and motion. Thus, we begin our approach to image compression by finding mathematical methods that preserve shape and texture in an efficient manner. This new non-traditional method begins by using fractals. A fractal is an object which when observed at its smallest level of detail resembles the overall object itself. Some natural examples include ferns, snowflakes, clouds, and mountains. Recently, engineers have applied fixed point theory to describe a method of fractal image compression . Unfortunately fixed point theory only provides a partial description of fractal compression, since it says little about the spatial frequency structure behind the process.

Fractal and Wavelet Image Compression Techniques

1999 Technology & Engineering
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Release : 1999
Genre : Technology & Engineering
Kind : eBook
Book Rating : 033/5 ( reviews)

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Book Synopsis Fractal and Wavelet Image Compression Techniques by : Stephen T. Welstead

Download or read book Fractal and Wavelet Image Compression Techniques written by Stephen T. Welstead. This book was released on 1999. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Wavelet Image and Video Compression

2006-04-18 Science
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Release : 2006-04-18
Genre : Science
Kind : eBook
Book Rating : 438/5 ( reviews)

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Book Synopsis Wavelet Image and Video Compression by : Pankaj N. Topiwala

Download or read book Wavelet Image and Video Compression written by Pankaj N. Topiwala. This book was released on 2006-04-18. Available in PDF, EPUB and Kindle. Book excerpt: An exciting new development has taken place in the digital era that has captured the imagination and talent of researchers around the globe - wavelet image compression. This technology has deep roots in theories of vision, and promises performance improvements over all other compression methods, such as those based on Fourier transforms, vectors quantizers, fractals, neural nets, and many others. It is this revolutionary new technology that is presented in Wavelet Image and Video Compression, in a form that is accessible to the largest audience possible. Wavelet Image and Video Compression is divided into four parts. Part I, Background Material, introduces the basic mathematical structures that underly image compression algorithms with the intention of providing an easy introduction to the mathematical concepts that are prerequisites for the remainder of the book. It explains such topics as change of bases, scalar and vector quantization, bit allocation and rate-distortion theory, entropy coding, the discrete-cosine transform, wavelet filters and other related topics. Part II, Still Image Coding, presents a spectrum of wavelet still image coding techniques. Part III, Special Topics in Still Image Coding, provides a variety of example coding schemes with a special flavor in either approach or application domain. Part IV, Video Coding, examines wavelet and pyramidal coding techniques for video data. Wavelet Image and Video Compression serves as an excellent reference and may be used as a text for advanced courses covering the subject.

Image Compression Using Fractals and Wavelets

1993
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Release : 1993
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Book Synopsis Image Compression Using Fractals and Wavelets by :

Download or read book Image Compression Using Fractals and Wavelets written by . This book was released on 1993. Available in PDF, EPUB and Kindle. Book excerpt: There are several approaches to image compression. The current most popular methods relies on eliminating high frequency components of the signal by storing only the low frequency Fourier coefficients. Other methods use a 'building block' approach, breaking up images into a small number of canonical pieces and storing only a reference to which piece goes where. Our research has focused on a new scheme based on fractals. Our approach to image compression is to tessellate the image with a tiling which varies with the local image complexity, and to check for self similarity amongst the tiles. Self similarities are coded as systems of affine transformations which can be stored far more compactly than the original images on small platforms. An original objective of our Phase II research project was to develop a hardware implementation of our Fractal based algorithm and to investigate various techniques for encoding. During the course of initial investigations it became apparent that the bulk of our efforts should be directed toward speeding up the software algorithms, especially in the decoding and adapting our fractal encoding methods to color images. This is because the most significant commercial applications of image compression require fast decoding.

Image Databases

2004-04-07 Computers
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Release : 2004-04-07
Genre : Computers
Kind : eBook
Book Rating : 074/5 ( reviews)

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Book Synopsis Image Databases by : Vittorio Castelli

Download or read book Image Databases written by Vittorio Castelli. This book was released on 2004-04-07. Available in PDF, EPUB and Kindle. Book excerpt: The explosive growth of multimedia data transmission has generated a critical need for efficient, high-capacity image databases, as well as powerful search engines to retrieve image data from them. This book brings together contributions by an international all-star team of innovators in the field who share their insights into all key aspects of image database and search engine construction. Readers get in-depth discussions of the entire range of crucial image database architecture, indexing and retrieval, transmission, display, and user interface issues. And, using examples from an array of disciplines, the authors present cutting-edge applications in medical imagery, multimedia communications, earth science, remote sensing, and other major application areas.

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