摘要
探讨了基于JPEG的有损压缩方法在载频条纹图分析中的应用前景。简介了当今流行的JPEG有损压缩技术和傅里叶变换轮廓术。使用专业软件对傅里叶变换轮廓术中拍摄的载频条纹图进行各种压缩比的压缩,解压后再解调出相位,与未经压缩的原图解调出的相位进行比较。将其相位误差与相位移法解调出的相位误差进行了对比,指出相对于相位移法而言,傅里叶变换轮廓术具有滤波的作用,对其拍摄的载频条纹图,应用JPEG压缩算法是可能的,解调出来的相位误差更小。
The applied foreground of lossy-JPEG image compression was studied which could use in carrier-fringe pattern images analysis. The popular lossy-JPEG image compression arithmetic and Fourier transform profilometry were introduced. Professional software was used to compress the carrier-fringe pattern images used in Fourier transform profilometry with different ratios. The pictures were decompressed and the phase was demodulated. And they were compared with original pictures. The phase error was compared with the phase error which demodulate by four-step phase-measuring method. The conclusion is drew that compare with four-step phase-measuring method, using JPEG to compress the images which use in Fourier transform profilometry is feasible. Because Fourier transform profilornetry has filter function so phase errors is less than four-step phasemeasuring method.
出处
《光学技术》
EI
CAS
CSCD
北大核心
2007年第3期357-360,共4页
Optical Technique
基金
国家自然科学资金资助(60677019)
关键词
有损压缩
载频条纹图
傅里叶变换轮廓术
JPEG
相关系数
lose compression
carrier-fringe pattern images
Fourier transform profilometry
JPEG
correlation coefficient
