Ridgelet变换在地震数据压缩中的应用

来源期刊：中南大学学报(自然科学版)2004年第2期

论文作者：袁修贵 宋守根

文章页码：300 - 303

关键词：Wavelet变换; Radon变换; Ridgelet变换;地震数据;数据压缩

Key words：wavelet transform; Radon transform; Ridgelet transform; seismic data; data compression

摘    要：鉴于地震数据反映的物理界面的空间展布往往具有直线、平面等特性,小波变换进行震压缩处理不能很好地反映这一特性,根据Ridgelet变换的特点,将Ridgelet变换应用于地震数据压缩,结合嵌入式零树编码方法,提出了Ridgelet变换的地震数据压缩方法。通过对实际资料的处理,在压缩率为99.0%和90%时,比较了Ridgelet变换与 小波变换处理结果。研究结果表明:Ridgelet变换应用于地震数据压缩,其对数据的压缩比比小波变换对数据的压缩比大。

Abstract: Wavelet transform has been introduced successfully to seismic data compression, it is efficient to the objects of point singularities according to its characters. In seismic data imaging, because the layers media is of line (or super-plane) singularities, wavelet transform has its shortcomings. Recently, a new transform, i.e., Ridgelet transform, was proposed. Ridgelet transformhas much higher precision, especially for describing the objectswhich have line (or super-plane) singularities. In this paper, accordingto this characterof ridgelet transform, the method of seismic data compressing, used Ridgelet transform is proposed. The results of the method are obtained for real seismic data. Practical experiments results show that the proposed method works well. With the comparisons to the wavelet transform, at the compression ratio 99.0% and 90%, the Ridgelet transform is more efficient and has higher compressing ratio, and is much better than other methods.