非均匀照明场中参考格栅信号提取的研究  

Study on Reference Grid Extracting from Ununiformity Illumination Field

作　　者：牛建军[1,2] 刘上乾[1] 付小宁[1] 

机构地区：[1]西安电子科技大学技术物理学院 [2]西安电子科技大学理学院,西安710071

出　　处：《电子测量与仪器学报》2005年第1期66-68,共3页Journal of Electronic Measurement and Instrumentation

摘　　要：本文对非均匀照明场中参考格栅图像作了统计分析 ,在此基础上提出了一种格栅信号提取方案。该方案利用图像中像素点邻域的灰度均值和均方差值的统计特性 ,把原始图像分割为一系列子图像 ,对每一个子图像进行自适应阈值分割 ,进而获得原始图像中的参考格栅信号。实验确定了各子图像临界阈值与图像灰度均值的关系 ,并与LoG算子的结果进行了对比 ,该方法明显较优。A statistical analysis on a reference grid image in a ununiformity illumination field is proposed. On that basis a grid signal extraction project is presented. The deviated value on the around zone for each pixel, several subsidiary image are got from the original image, they are segmented by the threshold value of auto-adaptive, and then obtained the reference grid image of the original image upon this knowledge. The relation between the threshold value and the mean gray level is given by experimental result. The result of this strategy is fine obviously through comparing with the result of LOG edge detected method.

关 键 词：子图像 LOG算子 自适应阈值分割 图像分割 非均匀 灰度 像素点 信号提取 统计特性 均方差 

分 类 号：TH432.1[机械工程—机械制造及自动化] TP391[自动化与计算机技术—计算机应用技术]