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在光测力学中,条纹图正则化是进一步提取条纹位相信息的重要基础。对于散斑条纹图来说,正则化的过程还需能够有效地抑制散斑噪声。本文提出一种基于多通道滤波技术的散斑条纹图正则化方法。通过使用多个Gabor滤波通道对散斑条纹图进行滤波,并且引入与条纹对比度有关的权重因子把各个滤波通道的滤波结果叠加起来,最终得到滤除了散斑噪声的正则化条纹图。数值模拟和实验结果表明,该方法在将散斑条纹图正则化的同时能够有效地滤除条纹图中的散斑噪声,为进一步提取条纹位相奠定了良好的基础。
In photometric mechanics, the fringe pattern regularization is an important basis for further extracting the information of the fringe phase. For the speckle fringe pattern, the regularization process needs to be able to effectively suppress the speckle noises. In this paper, we propose a regularization method of speckle fringe pattern based on multi-channel filtering. The speckle fringe pattern is filtered by using a plurality of Gabor filter channels, and the weight factor related to fringe contrast is introduced to superpose the filtering results of the respective filter channels to finally obtain a regularized fringe pattern with speckle noise filtering. Numerical simulation and experimental results show that this method can filter out the speckle noise in the fringe pattern while regularizing the speckle fringe pattern, which lays a good foundation for further extracting the fringe phase.