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http://dx.doi.org/10.6109/jkiice.2010.14.2.513

A Study on Noise Reduction Method using Wavelet Approximation Coefficient-based Distribution Characteristics  

Bae, Sang-Bum (부경대학교 전기제어공학부)
Kim, Nam-Ho (부경대학교 전기제어공학부)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.14, no.2, 2010 , pp. 513-520 More about this Journal
Abstract
The degradation phenomenon caused by noises significantly corrupts digitalized data. Therefore, a variety of methods to preserve the edge component of signals and remove noise simultaneously have been used in time domain and frequency domain. In this paper, we have proposed a new noise reduction algorithm using wavelet approximation coefficients to reduce the mixed noise overlapping the signal. The proposed algorithm adopts the distribution characteristics of the error function which is obtained by accumulating the wavelet approximation coefficients, in order to improve the capability to separate edges of the signal and noises.
Keywords
degradation; noise; wavelet approximation coefficient; distribution characteristic;
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