摘要
文章提出了一种新的用于斑点噪声抑制的非线性多小波变换自适应阈值算法。此算法对原图像进行多小波变换,然后在不同尺度,不同方向进行自适应阈值处理,仿真结果表明: 本算法能够有效地抑制了斑点噪声,又保留有用信号及边缘信息。通过比较证明其优于小波硬阈值和软阈值算法。
In this paper, a nonlinear multiwavelet transform adaptive threshold value method is proposed to suppress speckle noise. Experimental result shows the algorithm has nearly the same edge preserving performance as nonlinear multiwavelet transform,and nearly the same speckle noise suppression performance as filtering. That is say,it can not only effectively suppress speckle noise but also preserve availability signal and the geometrical features of images.
出处
《激光与红外》
CAS
CSCD
北大核心
2006年第2期155-157,共3页
Laser & Infrared
关键词
非线性多小波变换
自适应阈值
SAR斑点噪声
nonlinear multiwavelet transform
adaptive threshold value
SAR speckle noise
