Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/13737
Title: Enhancements to SPIHT-based and CSPIHT-based coders
Authors: SEE TOH CHEE WAH
Keywords: SPIHT CSPIHT DWT Wavelet Video Compression
Issue Date: 15-Jan-2004
Source: SEE TOH CHEE WAH (2004-01-15). Enhancements to SPIHT-based and CSPIHT-based coders. ScholarBank@NUS Repository.
Abstract: SPIHT and CSPIHT are two robust and efficient compression algorithms for encoding monochrome and color images, respectively. This thesis introduces two enhancements, Virtual Level and Flexible Spatial Orientation Tree, which can be used to improve the compression efficiencies of both SPIHT and CSPIHT. These enhancements are designed, implemented and tested by the author. Evaluation of compression results shows that both enhancements improve the compression efficiencies of SPIHT and CSPIHT, but only under the special circumstance that less DWT decomposition levels are performed due to image dimensions and limitation of the original Spatial Orientation Tree structure. Among the two enhancements, Flexible Spatial Orientation Tree allows the compression of arbitrary sized images, yields better compression and is clearly superior over Virtual Level.
URI: http://scholarbank.nus.edu.sg/handle/10635/13737
Appears in Collections:Master's Theses (Open)

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