Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/17021
Title: Multi-scale boundary representation using wavelet detection and arithmetic chain coding
Authors: YAP WEE HAU
Keywords: wavelet chain coding boundary representation detection
Issue Date: 28-Jul-2005
Source: YAP WEE HAU (2005-07-28). Multi-scale boundary representation using wavelet detection and arithmetic chain coding. ScholarBank@NUS Repository.
Abstract: This project involves the development of a multi-scale boundary representationusing wavelet detection and an improved chain-coding algorithm to codeboundary information.Classical gradient-based edge detectors (Roberts, Sobel, etc.) which use localpixel intensity changes to locate edges, are not able to distinguish edges ofdifferent significance. The proposed wavelet-based edge detection algorithmanalyses the interaction of the 1-D wavelet transform coefficients (acrosstransform scales) along image rows and columns to identify multi-scale edges ofdifferent significance. Next, the algorithm re-classifies the edge informationaccording to the 2-D correlation of the edge pixels. Edge pixels having strongerspatial correlation with neighbouring edge pixels would be promoted to a higherlevel of significance while those having weaker correlation with neighbouringedge pixels would be demoted. With this, the multi-scale edge detector isimplemented.The proposed Arithmetic-based Chain Coder encodes the boundary informationby applying arithmetic coding into chain-coding. The experimental results showpositive improvement in coding performance (by 29%) when compared toconventional chain coding or scanline arithmetic coding.
URI: http://scholarbank.nus.edu.sg/handle/10635/17021
Appears in Collections:Master's Theses (Open)

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
01_TitlePage.pdf26.85 kBAdobe PDF

OPEN

NoneView/Download
02_Acknowledgements.pdf13.57 kBAdobe PDF

OPEN

NoneView/Download
03_TableOfContents.pdf26.22 kBAdobe PDF

OPEN

NoneView/Download
04_Abstract.pdf19.13 kBAdobe PDF

OPEN

NoneView/Download
05_Lists.pdf48.43 kBAdobe PDF

OPEN

NoneView/Download
06_Chapter1.pdf30.4 kBAdobe PDF

OPEN

NoneView/Download
07_Chapter2.pdf1.47 MBAdobe PDF

OPEN

NoneView/Download
08_Chapter3.pdf144.4 kBAdobe PDF

OPEN

NoneView/Download
09_Chapter4.pdf87.04 kBAdobe PDF

OPEN

NoneView/Download
10_Chapter5.pdf325.46 kBAdobe PDF

OPEN

NoneView/Download
11_Chapter6.pdf2.21 MBAdobe PDF

OPEN

NoneView/Download
12_Chapter7.pdf107.37 kBAdobe PDF

OPEN

NoneView/Download
13_Chapter8.pdf21.64 kBAdobe PDF

OPEN

NoneView/Download
14_References.pdf28.52 kBAdobe PDF

OPEN

NoneView/Download
15_Appendix.pdf21.47 kBAdobe PDF

OPEN

NoneView/Download

Page view(s)

203
checked on Dec 18, 2017

Download(s)

881
checked on Dec 18, 2017

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.