Improvement of measuring accuracy of spatial fringe analysis method using a Kalman filter and its application
Improvement of measuring accuracy of spatial fringe analysis method using a Kalman filter and its application
复制标题
卡尔曼滤波器空间条纹分析方法测量精度的提高及其应用
DOI：
10.1117/1.1410103
复制
发表时间：
2001
影响因子：
1.3
通讯作者：
S. Yokozeki
中科院分区：
文献类型：
--
作者：
Y. Arai;S. Yokozeki
当基于莫尔技术的空间条纹分析方法应用于有噪声的条纹图像时，在处理中出现例如相位展开、分析精度等问题，数字滤波器技术和基于时间序列分析的滤波器应用于空间条纹分析方法以解决这些问题。在利用条纹图像的模型的仿真中，结果表明，使用数字滤波器的空间条纹分析方法对于图像中的噪声具有高度鲁棒性，并且使用卡尔曼滤波器的方法可以平滑且准确地检测具有连续相位分布的对象的相位图。最后，将该方法应用于电子散斑干涉条纹图像的分析。基于该方法的散斑干涉术可以用普通的电子散斑干涉系统分析散斑图。结果表明，基于莫尔条纹技术的空间条纹分析方法，只需一幅条纹图像，就能准确地分析散斑条纹图像的相位。该方法有望加速电子散斑干涉技术在工业上的应用。
When the spatial fringe analysis method based on the moire technique is applied to a noisy fringe image, problems arise in the processing with, for example, phase unwrapping, accuracy of analysis, and so on. A digital filter technique and a filter based on time series analysis are applied to the spatial fringe analysis method to solve these problems. In a simulation with a model of the fringe image, results show that the spatial fringe analysis method using digital filters is highly robust against a noise in an image, and that the method using a Kalman filter can smoothly and accurately detect the phase map of the object with a continuous phase distribution. Furthermore, the method is applied to analyze a speckle fringe image in ESPI. A new speckle interferometry based on the proposed method can analyze specklegrams with a normal ESPI system. The results show that a spatial fringe analysis method based on the moire technique can analyze accurately the phase of a speckle fringe image using only a single fringe image. The proposed method can be anticipated to accelerate the use of ESPI in industry.