摘要
探讨了多小波函数及其预处理方法对探地雷达(ground penetrating radar—GPR)图象去噪性能的影响,在Donoho D L和Johnstone I M提出的小波阈值去噪方法的基础上提出了一个改进的阈值函数,并对实际的GPR图象进行阈值化处理和对比分析,结果表明选取合适的预处理方法,采用DGHM和STT多小波对GPR图象去噪可获得比其他方法更好的效果。
The influence on ground penetrating radar (GPR) image de-noising with the multi-wavelets pre-processing methods and multi-wavelet function is discussed and investigated. A novel thresholding function is presented based on the wavelet shrinkage put forward by Donoho D L and Johnstone I M, and the processing by using an improved thresholding function is analyzed and compared. The results of simulation experiment indicate that the de-noising effect of GPR image with DGHM and STT multi-wavelets based on proper pre-processing methods is better than those traditional methods.
出处
《系统仿真学报》
EI
CAS
CSCD
北大核心
2005年第4期855-858,862,共5页
Journal of System Simulation
基金
教育部博士基金资助(20030290003)
山东省自然科学基金资助(Y2002G08)。
关键词
多小波变换
探地雷达
图象去噪
预滤波
阈值函数
multi-wavelet transform
ground penetrating radar (GPR)
image de-noising
pre-filter
thresholding function
