摘要
本文针对地震图像具有线形纹理的特征 ,提出和分析了基于偏微分方程一致增强性扩散去噪模型及其适用范围 ,设计了提高地震图像信噪比的具体算法 ,同时研究了扩散模型中的参数选择 .大量真实地震图像处理结果及其数据分析表明 ,在信号能量保持 80～ 90 %的条件下 ,对于信噪比为 15～ 2 0dB的地震图像 ,可使其信噪比提高 9dB左右 ,且不会出现假象 ,增强了地质信息 ,有利于地震解释 。
According to line-like texture characters of seismic image,the suppressing noise model and applicable fields of coherent enhancing diffusion based on partial differential equation are presented and analyzed.Then,an actual algorithm of increasing signal to noise ratio (SNR) of seismic image is designed,at the same time,the selections of some parameters used in the diffusion model are studied.A great deal of processing results and data analysis of real seismic images indicate that SNR could be increased about 9dB for seismic image with SNR being 15～20dB under the condition that the 80～90% of signal energy is kept.There are no artifacts,and as important geological information could be enhanced as well.All of these are available to seismic interpretation and have the very great significance for exploring the geological reserves.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2004年第11期1885-1890,共6页
Acta Electronica Sinica
关键词
地震图像处理
线形纹理
偏微分方程
一致增强性扩散
信噪比
数据分析
seismic image
line-like texture
partial differential equation
coherence enhancing diffusion
signal to noise ratio
data analysis
