基于小波变换的解相技术研究  

Study on Phase Demodulation Technique Based on Wavelet Transform

作　　者：许庆红[1] 钟约先[1] 由志福[1] 

机构地区：[1]清华大学机械工程系，北京 100084

出　　处：《光学学报》2000年第12期1617-1622,共6页Acta Optica Sinica

摘　　要：提出一种基于小波变换的频域解相技术。对调制栅线图像进行小波变换 ,生成被测物体背景图像 ,两幅图像相减得到相对变形栅线图像 ,分析基频谱 ,由于背景成分基本消除 ,利于有用频带的提取 。A novel phase demodulation technique in frequency domain based on wavelet transform is introduced. Handling the original modulated grating image with wavelet transform, the object background image is created. And subtracting these two images, a relative distorted grating image is obtained. The background components in spectrum of the relative image are basically removed and the useful one is leached easily. The steep gradient and complex object shapes can be measured automatically with this technique.

关 键 词：解相 频域处理 频谱 小波变换 信号处理 光栅 

分 类 号：O436[机械工程—光学工程] O438[理学—光学]