一种基于条纹密度和方向的干涉条纹图滤波方法

An Interference Fringe Pattern Filtering Method Based on Fringe Density and Direction

光学干涉测量技术是以激光技术、视频技术、计算机图像处理技术相结合的一种现代测量技术。针对传统的图像滤波算法和经典的偏微分方程滤波存在的问题,将偏微分方程应用于干涉条纹图像滤波中,以条纹图光强导数为零的方向为条纹方向,并用条纹灰度在法向上的变化量来估计条纹密度;然后结合条纹的方向性和条纹疏密性对现有的偏微分方程滤波模型进行了改进。最后对实验结果进行了定性和定量分析,表明改进后的模型可以更有效地对光干涉图像进行滤波处理。

Optical interferometry techniques is a modem measuring technology that combined with laser technology, video technology, and computer image processing technology. For the problems of the traditional image filtering algorithms and classical partial differential filter, the partial differential equation was applied to interference fringe image filtering. It defined the fringe intensity derivative in the direction of zero as stripe direction and esti- mated the fringe density by the change of gray stripe normal, then improved the existing partial differential equations model combined with the stripes directionalit and density. Finally, do the analysis with the qualitative and quantitative of experimental results, and it showed that the improved model can do the filtering processing more effectively for the optical interference image.