用定阈值Wiener滤波去除图像噪声

Image Denoising Using Prethresholding Wiener Filtering

本文介绍了Wiener滤波中的统计误差,提出 Wiener滤波去噪性能可以通过定阈值对图像作预处理得到提高,用标准 Wiener滤波法、逆滤波法及定阈值 Wiener滤波法对退化图像进行处理的结果表明,在进行图像恢复时,标准 Wiener滤波效果比逆滤波好,定阈值 Wiener滤波则优于标准 Wiener滤波和逆滤波。

This paper introduces the statistical errors occurring in Wiener filtering and presents possibility of improv- ing Wiener filtering performance in image denoising using prethresholding as a processing step. The results obtained by standard Wiener filtering, inverse filtering and prethresholding Wiener filtering in degenerated image processing show that in image restoration standard Wiener filtering is better than inverse filtering and prethresholding Wiener is much better than both standard Wiener filtering and inverse filtering.