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由统计特性分析激光主动成像系统图像的噪声性质
引用本文:李自勤,李琦,王骐.由统计特性分析激光主动成像系统图像的噪声性质[J].中国激光,2004,31(9):081-1085.
作者姓名:李自勤  李琦  王骐
作者单位:哈尔滨工业大学光电子技术研究所可调谐激光技术国家级重点实验室,黑龙江,哈尔滨,150001
摘    要:激光主动成像系统具有分辨率高、抗干扰能力强、能成三维像等一系列优点,因而应用越来越广泛,但它的图像同时受到散斑噪声和其他一些高斯噪声的影响。散斑噪声为一种乘性噪声,高斯噪声则为一种加性噪声,这两种噪声哪种占据主要地位对于图像噪声抑制噪声模型的建立具有重要的意义,分析了受到散斑噪声和高斯噪声污染图像的概率曲线及灰度均值方差比等统计特性,找出在两种噪声分别作用下的不同统计特性,以此为判别标准,对激光主动成像系统图像进行分析,得出了此图像所受噪声的主要成分为散斑噪声的结论。同时,算出了此图像的散斑噪声方差。

关 键 词:图像处理  激光主动成像系统  统计特性  噪声性质
收稿时间:2003/5/15

Noise Characteristic in Active Laser Imaging System by Statistic Analysis
LI Zi-qin,LI Qi,WANG Qi.Noise Characteristic in Active Laser Imaging System by Statistic Analysis[J].Chinese Journal of Lasers,2004,31(9):081-1085.
Authors:LI Zi-qin  LI Qi  WANG Qi
Abstract:Active laser imaging system, which can be of high resolution, anti-interference and three-dimensional (3-D) imaging, has been used widely. But its imagery can be disturbed by speckle and some other Gaussian noises. Speckle noise is a kind of multiplicative noise and the Gaussian noise is additive noise, and which noise on the dominating status is very important for building the model of noise suppression. So, in the paper, the statistic characteristics such as probability curve and gray mean variance ratio etc. in the imagery disturbed by speckle and some other Gaussian noises are analyzed firstly, then the different statistic characteristics effected by the two kinds of noises respectively are found. Based on these characteristics, the images of active laser imaging system are discussed, then the results show that the most imagery noise is speckle. At the same time, the speckle noise variance in this imagery is calculated.
Keywords:image processing  active laser imaging system  statistic characteristic  noise characteristic
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