中国机械工程Issue(13)：1795-1799,5.DOI:10.3969/j.issn.1004-132X.2014.13.018
基于双树复小波变换的三维粗糙表面评定方法研究
Evaluation Method of Three-dimensional Rough Surface Based onDual-tree Complex Wavelet Transform Methods
摘要
Abstract
At present,wavelet transform applied to the establishment of three-dimensional rough surface datum was mainly the first and the second-generation wavelet.However,they had some de-fects such as the shift variation and poor directional selectivity and so on,especially the selection of optimum wavelet base and the determination of the times of wavelet decomposition,which was always the difficult points of surface evaluation.Now the third generation wavelet DT-CWT was used for val-uation of three-dimensional rough surfaces,by comparing the datum errors and maximum reconstruc-tion error of the actual reconstruction images of the three wavelets as well as simulation of three-di-mensional rough surface,the optimality of DT-CWT was obtained.Band energy method was em-ployed to ascertain the times of wavelet decomposition and then mean square error S which was the characterization parameter of three dimensional simulation surfaces was used to check the correctness of decomposition times.Finally,the reference surface of the three dimensional nonstationary random rough surface with fractal properties was extracted by DT-CWT transform.The results prove the ef-fectiveness.关键词
双树复小波变换/评定基准面/频带能量法/三维粗糙表面Key words
dual-tree complex wavelet transform (DT-CWT)/evaluation datum/band energy method/three-dimensional rough surface分类
机械制造引用本文复制引用
任志英,高诚辉,林建兴,申丁..基于双树复小波变换的三维粗糙表面评定方法研究[J].中国机械工程,2014,(13):1795-1799,5.基金项目
国家自然科学基金资助项目(51175085,51205062) （51175085,51205062）
福建省教育厅 A 类项目(JA13059) （JA13059）
福州大学科技发展基金资助项目(600907) （600907）
