NDLI: Performance improvement algorithms for colour image compression using DWT and multilevel block truncation coding

Content Provider	IEEE Xplore Digital Library
Author	Al-Azawi, S. Boussakta, S. Yakovlev, A.
Copyright Year	2010
Description	Author affiliation: School of Electrical, Electronic and Computer Engineering, Newcastle University, Newcastle Upon Tyne, NE1 7RU, England, UK (Al-Azawi, S.; Boussakta, S.; Yakovlev, A.)
Abstract	This paper introduces two algorithms for colour image compression. The first one is intensity based adaptive quantization coding (IBAQC), while the second is a combination of discrete wavelet transforms (DWT) and the IBAQC algorithm. The AQC produced a good peak signal to noise ratio (PSNR) with high bit per pixels (bpp). The aim of this paper is to present algorithms with low bit rate whilst preserving the PSNR and image quality to an acceptable range. The experiments were performed using different kinds of standard color images, multi level quantizers, different thresholds, different block sizes, and different wavelet filters. Both algorithms considered the intensity variation of each colour plane. The results obtained showed a good reduction in bpp compared with the AQC algorithm, with a little loss in PSNR due to the dropping of some blocks that claimed to be low intensity variation according to a comparison with predefined thresholds for each colour plane.
Starting Page	811
Ending Page	815
File Size	728242
Page Count	5
File Format	PDF
ISBN	9781424488582
e-ISBN	9781861353696
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-07-21
Publisher Place	United Kingdom
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Image coding PSNR Image color analysis Bit rate Quantization Filtering algorithms Discrete wavelet transforms
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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