摘要
研究了噪声能量的估计方法:MAD法及其改进方法,空域相关估计法.在传统阈值法的基础上,提出半软阈值法.仿真结果表明:半软阈值去噪方法有效地抑制了噪声,提高了信噪比,同时保留了图像细节,获得了最小的均方差,具有一定的应用价值.
The estimation methods of noise energy are studied in this paper, which include MAD method and its improved null field correlation estimation method. Semi-soft threshold method is put forward based on classical threshold methods. The simulation results show that the semi-soft threshold denoising method reduces the noise effectively, improves the ratio of signal and noise, retains the detail of image and obtains the minimum mean square deviation. It finds some application in engineering.
出处
《大庆石油学院学报》
CAS
北大核心
2004年第1期63-66,共4页
Journal of Daqing Petroleum Institute
关键词
图像信号
半软阈值法
噪声能量估计
去噪方法
image signal
semi-soft threshold model
estimation of noise energy
denoising method
