摘要
作者在本文中就如何利用小波变换消除噪音干扰的方法进行了研究。针对地震资料的特点提出了消除相干干扰的具体计算方法 ,即将地震资料用小波变换分频处理 ,针对干扰与有效波共存的频段波场 ,利用自动追踪找出相干干扰的方向 ,再用中值滤波恢复相干波场 ,即从共存的波场中分离出来 ,再对它进行小波反变换即可重构相干干扰 ,最后从原始记录中消去它 ,以获得所需要的有效信号。几个地区的试算表明该方法的有效性 。
This paper mainly studies how to eliminate noise interference by wavelet transform and puts forward an applied method to cleanup the coherence interference in seismic data. At first, frequencies of seismic data are divided using wavelet transform and the direction of the coherence interferences in the common frequency band of the interferences and signals are traced automatically. Then, coherence interference is recovered by mid-value filtering. The interference is separated from the common frequency band and reconstructed by reverse wavelet transform and consequently is deducted from original data. A real case is given to illustrate the validity of this method.
出处
《物探化探计算技术》
CAS
CSCD
2001年第4期299-302,共4页
Computing Techniques For Geophysical and Geochemical Exploration
关键词
小波变换
中值滤波
自动追踪
相干干扰
地震资料
wavelet transform
mid value filter
automatic tracing
coherence interference
seismic data
