高散射介质后向扩散散射实验的图像预处理  

Image Pre-processing for Diffuse Backscattering of Polarized Light from Highly Scattering Media

作　　者：陈远[1] 王凌[1] 冯华君[1] 徐之海[1] 黎明[1] 

机构地区：[1]浙江大学现代光学仪器国家重点实验室,浙江杭州310027

出　　处：《光电子．激光》2005年第11期1373-1377,共5页Journal of Optoelectronics·Laser

摘　　要：在高散射介质后向扩散散射实验中,偏振光扩散散射空间光强分布(PDB pattern)图像的几何偏差会影响其对称性,给精确分析带来困难。本文提出的图像预处理采用中值滤波的方法对图像进行去噪处理,运用函数矩理论对pattern的几何偏差进行矫正。实验结果显示,图像预处理能够有效地消除实验系统几何偏差引起的图像不对称性,以提高PDB pattern分析的准确度,有利于该系统应用于实时测量。In the experiments of diffuse backscattering from highly scattering media, the symmetry of the polarized-light diffuse backscattering（PDB） patterns are influenced by the its geometrical error, which prevents the precise analysis. An image pre-processing method is proposed to reduce the noise of the pattern images and correct the geometrical error by means of the median filter and the theory of moments, respectively. The experimental results show that the image pre-processing can eliminate the pattern asymmetry caused by the geometrical error of the system. It improves the analysis accuracy for the PDB pattern and makes the real-time measurement possible.

关 键 词：图像预处理 后向扩散散射 偏振 高散射介质 

分 类 号：TN911.73[电子电信—通信与信息系统]