基于旋滤波的散斑干涉图预处理方法
Preprocess method for speckle interference image based on spin filtering
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摘要: 介绍了旋滤波算法中窗口大小变化对滤波效果的影响，得出旋滤波的窗口应该取在约1/4条纹宽度的结论。处理了大散斑噪声的干涉图，发现窗口尺寸必须超过散斑尺寸才能得到比较好的滤波效果。确定了旋滤波算法应用的范围是大于散斑尺寸，且在1/4条纹宽度处比较合适。针对滤波后条纹对比度降低的问题，使用灰度拉伸的方法进行对比度增强。Abstract: This paper introduces the filter effect after the image with speckle noise is processed by different spin filters window. Comparing the images processed by spin filters, it is proved that the spin filter window should be one-fourth of the fringe width, and must be larger than the speckle size to filter off noise for images with large speckle noise. The gray scale extension has been applied for the fringe image to increase the fringe contrast, which was reduced by the spin and median filter.
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Key words:
- spin filtering /
- speckle noise /
- median filtering /
- interference image /
- preprocess
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