图像去噪滤波方法的对比研究

Comparative Study on Image Denoising Filter

去噪是图像预处理的关键,线性滤波器和非线性滤波器都可以对图像进行滤波操作。选取线性滤波器中的高斯滤波与非线性滤波器中的中值滤波和引导滤波对被椒盐噪声和高斯噪声污染的双排线束图像进行去噪操作,通过主观视觉观测和客观指标两个方面来衡量3种滤波方法的去噪效果并进行对比研究。结果表明:中值滤波去椒盐噪声的效果最好;引导滤波去高斯噪声的效果最好;当同时存在椒盐、高斯混合噪声时,中值滤波和引导滤波都能收获较好的滤波效果,但是引导滤波处理后的输出图像与原始图像的结构相似性更高。

In this paper,a comparison study is carried out to test denoising effects among Gaussian filter,median filter and guided filter.The results show that the median filter has the best effect on removing salt and pepper noise.Guided filtering has the best effect of removing Gaussian noise.When pepper,salt and Gaussian mixture noise is present,both median filtering and guided filtering show better filtering effect,but the output image processed by guided filtering has higher structural similarity with the original image.