Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor | Department of Electronic and Information Engineering | en_US |
| dc.creator | Cheung, Kin-pong | - |
| dc.identifier.uri | https://theses.lib.polyu.edu.hk/handle/200/4521 | - |
| dc.language | English | en_US |
| dc.publisher | Hong Kong Polytechnic University | - |
| dc.rights | All rights reserved | en_US |
| dc.title | Techniques for reducing the computation effort of matching pursuits | en_US |
| dcterms.abstract | Matching pursuits is a method which utilises an iterative procedure to project a given waveform onto a particular dictionary. It has been successfully applied in different areas such as data compression since its introduction in 1993. Recent research has demonstrated that it helps to provide a very good coding performance at very low bit-rate video compression. However, its realization effort is so high that it is nearly impossible for real-time applications. This thesis is primarily concerned with how to realize matching pursuits efficiently and effectively. Since matching pursuits is basically a core module widely used in various applications, a fast matching pursuits algorithm would directly speed up the realization of a number of applications. In this thesis, a technique for convening a matching pursuits problem into a vector quantization problem is presented. This technique allows one to realize matching pursuits with a lot of well-developed fast vector quantization algorithms. As a result, a number of fast matching pursuits algorithms can be obtained. In this thesis, the partial searching algorithm, a classical technique for realizing vector quantization is used as an example to show how to realize matching pursuits and orthogonal matching pursuits, a variant of matching pursuits, with the proposed technique in an efficient way. A fast two-stage algorithm based on a recently proposed two-stage filtering structure for realizing matching pursuits is also presented in this thesis. A complete analysis of the structure is provided and the optimization of the two stages is investigated. Simulation results show that a significant improvement of the performance of the structure can be achieved. | en_US |
| dcterms.extent | xi, 104 leaves : ill. (some col.) ; 30 cm | en_US |
| dcterms.isPartOf | PolyU Electronic Theses | en_US |
| dcterms.issued | 2002 | en_US |
| dcterms.educationalLevel | All Master | en_US |
| dcterms.educationalLevel | M.Phil. | en_US |
| dcterms.LCSH | Hong Kong Polytechnic University -- Dissertations | en_US |
| dcterms.LCSH | Image processing -- Digital techniques | en_US |
| dcterms.LCSH | Signal processing -- Digital techniques | en_US |
| dcterms.accessRights | open access | en_US |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| b16576664.pdf | For All Users | 8.75 MB | Adobe PDF | View/Open |
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