A Method for Obtaining Basic Frequency of Grating Image in Fourier Transforms Profilometry

摘要：

In order to obtain the useful basic frequency easily and reduce the loss of image energy in the Fourier transforms profilometry, the multi-scale character of wavelet transform is used to separate the direct current part and the basic frequency in this paper. Then the handled grating images are filtered according to the number and features of noises. The simulation test indicates that the choice of filter window and the level of wavelet decomposing scale are important. And the method is tested effective in this paper.

关键词： wavelet transform Fourier transforms profilometry spectrum characteristic basic frequency

作者: LV Yutao GUO Chaoyong HU Mingshu

作者单位: Shijiazhuang Mechanical Engineering College Shijiazhuang, 050003 China

会议类型: 国际会议

会议名称: 第七届国际测试技术研讨会

会议地点: 北京

会议语种:英文

在线出版日期: 2007-08-05（万方平台首次上网日期，不代表论文的发表时间）