NDLI: Statistical modelling of wavelet coefficients of CT scan image

Content Provider	IEEE Xplore Digital Library
Author	Kumar, B. Singh, S.P. Mohan, A. Anand, A. Singh, H.V.
Copyright Year	2009
Description	Author affiliation: Kamla Nehru Institute of Technology, Sultanpur-228118, India (Singh, H.V.) \|\| Institute of Technology, Banaras, Hindu University Varanasi-221005, India (Singh, S.P.; Mohan, A.; Anand, A.) \|\| Motilal Nehru National Institute of Technology, Allahabad- 211004, India (Kumar, B.)
Abstract	Prior knowledge of wavelet coefficient statistics is a key issue in the development of better quantization strategy for enhancing compression efficiency of digital images. Since statistics of medical images are quite different from those of natural images, there is a need for statistical modelling of wavelet coefficients in different subbands. This paper examines the suitability of Student-t, Pareto Weibull and Gaussian distributions for modelling the wavelet coefficients of various subbands in a CT scan image to improve the compression efficiency. It has been found that the statistics of wavelet coefficients in the CT scan images can be better approximated by the generalized Student-t distribution for negative wavelet coefficients whereas generalized Pareto distribution provides better fit for the non-negative coefficients. The results can be potentially useful in designing adaptive quantizer for achieving improved compression gain and reducing computational complexity for medical image coders.
Starting Page	162
Ending Page	165
File Size	468797
Page Count	4
File Format	PDF
ISBN	9781424448463
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-12-22
Publisher Place	India
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Digital images Quantization Gaussian distribution Shape parameter Statistics Wavelet coefficients Image coding Eibull distribution Computed tomography Generalized Pareto distribution Statistical distributions Chi-square test Pareto analysis Biomedical imaging Generalized Student-t distribution
Content Type	Text
Resource Type	Article

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