A precise computation method of Lipschitz Exponent under noisy condition
In noisy condition,the accurate measurement of Lipschitz exponent is very important for many actual applications.All the modulus maxima are utilized to estimate Lipscbitz exponent in each maximum line in traditional wavelet transform modulus maxima (WTMM) method,but as the positions and wavelet coefficients are corrupted in some scales by the noise,so the performance of estimation is poor.For this proposed method,the unpolluted modulus maxima are filtrated in each maxima line,and then these modulus maxima and corresponding scales are used to obtain a pre-estimation of Lipschitz exponent.Based on the pre-estimation,different weighted operations are applied to achieve the precise estimation of Lipschitz exponent.Finally,the experimental resuits verify the good performance of the proposed method.
Lipschitz Exponent computation wavelet transform modulus maxima pre-estimation noisy condition
Xingwei Yan Wei Wang Lu Dawei Zhang Jun Wan Jianwei
School of Electronic Science and Engineering National University of Defense Technology Changsha,China
国际会议
杭州
英文
1755-1759
2013-03-22（万方平台首次上网日期，不代表论文的发表时间）