Automatic analysis of speckle photographs with extended range and improved accuracy.
Automatic analysis of speckle photographs with extended range and improved accuracy.
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自动分析散斑照片，范围更广，精度更高。
DOI：
10.1364/ao.29.000296
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发表时间：
1990
期刊：
影响因子：
1.9
通讯作者：
I. Yamaguchi
中科院分区：
文献类型：
--
作者：
N. Deng;I. Yamaguchi
提出了一种适用于条纹数> ~ 0.5的散斑摄影中杨氏条纹自动分析的新算法。该算法首先将衍射图样除以相应的衍射晕，然后对各方向波段的结果进行积分来检测条纹的方向，并利用曲线拟合来确定条纹间距。该算法实现了双曝光散斑图的全自动分析，实现了大范围的散斑位移，提高了精度。利用分析结果绘制了位移场和应变场的轮廓。
A new algorithm for automatic analysis of Young's fringes in speckle photography, applicable to fringe numbers >0.5, is developed. In the algorithm we first divide the diffraction pattern by the corresponding diffraction halo, then integrate the result over bands in various directions for detecting the fringe orientation, and use curve fitting for determining the fringe spacing. The algorithm has enabled fully automatic analysis of double-exposure specklegrams for a wide range of speckle displacement with improved accuracy. Contours of displacement and strain fields have also been plotted using the result of the analysis.