DocumentCode :
554439
Title :
Extracting subtle feature of target signal based on double tree complex wavelet transformation
Author :
Liu Jihai ; Li Dongsheng ; Xu Jiren ; Cheng Jiasong ; Gao Huaihui
Author_Institution :
Dept. of Inf., Eletric Eng. Inst. of Hefei, Hefei, China
Volume :
3
fYear :
2011
fDate :
12-14 Aug. 2011
Firstpage :
1177
Lastpage :
1180
Abstract :
Double tree after wavelet transform has good direction selectivity and invariant parallel movement. Based on analysing histogram of modulus sub-band corresponding to six high frequency sub-band after double tree wavelet decomposition, we put forward a new kind of subtle character, namely combination character of Lognormal distribution parameters and Gamma distribution parameter. Using the character to segment signal feature, and using edge smooth technology in the process of segmentation and using k-means clustering to realize unsupervised segmentation. Experiments show that the method of feature extraction is new, and edge accuracy of segmentation results and regional consistency has antinoise character, and it is a kind of effective subtle segmentation method.
Keywords :
feature extraction; gamma distribution; pattern clustering; signal denoising; trees (mathematics); wavelet transforms; antinoise character; combination character; direction selectivity; double tree complex wavelet transformation; double tree wavelet decomposition; edge accuracy; edge smooth technology; gamma distribution parameter; invariant parallel movement; k-means clustering; lognormal distribution parameter; regional consistency; signal feature segmentation; subtle character feature extraction; subtle segmentation method; target signal; unsupervised segmentation; Accuracy; Discrete wavelet transforms; Feature extraction; Wavelet analysis; Wavelet domain; Double tree wavelet transform; Gamma distribution; Lognormal distribution; subtle features;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electronic and Mechanical Engineering and Information Technology (EMEIT), 2011 International Conference on
Conference_Location :
Harbin, Heilongjiang, China
Print_ISBN :
978-1-61284-087-1
Type :
conf
DOI :
10.1109/EMEIT.2011.6023304
Filename :
6023304
Link To Document :
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