摘要
为了消除或衰减图像上的噪声,同时尽可能地保留图像细节,提出了一种基于双谱的图像平滑去噪法。该方法根据双谱对高斯噪声不敏感(即高斯噪声的双谱为零)的特性,对一个像素点采用其梯度和最小的几个点的灰度平均值来代替其灰度值,以便对噪声进行平滑滤波的同时,最大限度地保留图像的细节信息。仿真结果表明,该方法较好地实现了这个要求。与常用的中值滤波相比,该方法处理后的PSNR可提高1dB。
In order to remove the noise of the image and keep the details of the image, a novel image noise smoothing method based on bispectrum has been proposed. It uses the property that bispectrum is not sensitive to Gauss noise, and can mostly keep the image details while greatly dwindling down the noise. Simulation results have shown the effectiveness of the proposed scheme, the PSNR has been improved for about 1 dB compared with the images processed by other methods.
出处
《长春工业大学学报》
CAS
2005年第2期114-116,共3页
Journal of Changchun University of Technology
基金
吉林省科技厅基础研究基金资助项目(吉科合字第20010120号)
关键词
噪声
图像平滑
双谱
noise
image-smoothing
bispectrum.
