基于Holt双参数指数平滑的图像椒盐噪声滤除

Salt and pepper noise filtering algorithm based on Holt's two-parameter exponential smoothing

在消除椒盐噪声的问题上,引入Holt双参数平滑法,利用像素点坐标位置代替原本时间序列,在进行加边处理后,对图像中每个像素点,选取其上方、左方已处理的像素点,利用Holt双参数平滑法对目标像素进行预测.与以往几种算法对比,本文算法简单易于实现,在去除噪声和保留细节方面具有更好的效果,此外这一方法对低噪声比和高噪声比的图像都有显著效果.

In this paper, Holt＇s two -parameter smoothing method was introduced inventivelyto eliminate salt -pepper noise. Firstly, the original time series was replaced by the pixelcoordinate position. After the edge processing was performed, Holt＇s two -parameter smoot-hing method was used to predict the target pixel. Finally compared with previous algorithms,this algorithm was simple and easy to implement, and has better effect in removing noise andretaining details. For the images with low noise ratio and high noise ratio, the method in thispaper was suitable for images with low noise ratio and high noise ratio.