Accession Number : ADA336873

Title :   A Wavelet Fractal Method for Content Based Image and Video Compression

Descriptive Note : Doctoral thesis

Corporate Author : COLUMBIA UNIV NEW YORK

Personal Author(s) : Bonneau, Robert J.

PDF Url : ADA336873

Report Date : 30 JAN 1998

Pagination or Media Count : 166

Abstract : 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.

Descriptors :   *IMAGE PROCESSING, *WAVELET TRANSFORMS, DATA BASES, ALGORITHMS, FRACTALS, FOURIER TRANSFORMATION, THESES, DATA COMPRESSION, VIDEO SIGNALS, PIXELS, DECODING, OBJECT ORIENTED PROGRAMMING, CLIENT SERVER SYSTEMS.

Subject Categories : Cybernetics

Distribution Statement : APPROVED FOR PUBLIC RELEASE