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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。
Laser active imaging system has a series of advantages such as high resolution, strong anti-interference ability, capable of three-dimensional image, so it is more and more widely used, but its image is affected by both speckle noise and some other Gaussian noise. Speckle noise is a kind of multiplicative noise, and Gaussian noise is an additive noise. Which of these two kinds of noise occupy the main position is of great significance to the establishment of image noise suppression noise model, and the influence of speckle noise and Gaussian Noise pollution image probability curve and the gray mean value variance ratio and other statistical properties, to find out the two different statistical characteristics of noise under the action of this as a criterion for laser active imaging system image analysis, the image was drawn The main component of noise suffered is speckle noise. At the same time, the speckle noise variance of this image is calculated.