应用科学学报 ›› 2014, Vol. 32 ›› Issue (3): 274-280.doi: 10.3969/j.issn.0255-8297.2014.03.008

• 信号与信息处理 • 上一篇    下一篇

逆时偏移成像与SPIHT 的应用

张晓丹1, 张志禹2, 徐进1, 朱耀麟1   

  1. 1. 西安工程大学电子信息学院,西安710048
    2. 西安理工大学自动化与信息工程学院,西安710048
  • 收稿日期:2013-09-05 修回日期:2013-10-17 出版日期:2014-05-31 发布日期:2013-10-17
  • 作者简介:张晓丹,博士,讲师,研究方向:信号与信息处理、地震信号偏移成像处理、小波分析等,E-mail:xinda0723@126.com
  • 基金资助:

    陕西省教育厅自然科学基金(No.12JK0513);西安工程大学博士科研项目基金(No.BS1118)资助

Reverse Time Migration Imaging and SPIHT

ZHANG Xiao-dan1, ZHANG Zhi-yu2, XU Jin1, ZHU Yao-lin1   

  1. 1. Institute of Electronics and Information, Xi’an Polytechnic University, Xi’an 710048, China
    2. Institute of Automation and Information Engineering, Xi’an University of Technology, Xi’an 710048, China
  • Received:2013-09-05 Revised:2013-10-17 Online:2014-05-31 Published:2013-10-17

摘要: 逆时偏移成像建立在全波波动方程基础上,偏移成像结果精准,但偏移时计算耗时长,影响了逆时偏移的实际应用. 以缩短逆时偏移的计算时间为目的,分析造成计算耗时的原因,采用基于提升构架的整数小波变换的多级树集合分裂(set partitioning in hierarchical tree, SPIHT) 图像编码方法降低逆时偏移计算时的内存占有量,解决了计算耗时过长的问题,提高了综合计算效率. 对Marmousi 模型叠前深度逆时偏移处理表明,该方法能较好地解决逆时偏移计算耗时的问题,而且不影响成像精度.

关键词: 逆时偏移成像, 计算机机时, 整数小波变换, SPIHT, Marmousi 模型

Abstract: Reverse time migration (RTM) is a precise migration methods based on the full-wave equation,however, RTM takes too much computing time. This paper aims to save the computing time by analyzing the RTM and applying set partitioning in hierarchical tree (SPIHT) based on integer wavelet transform (IWT)
of LS to save memory consumption, thus reducing computing time. The Marmousi model is used in the RTM-SPHIT method. The migration results show that the method can solve the problem of computing time consumption with good imaging accuracy.

Key words:  reverse time migration (RTM), computer time, integer wavelet transform (IWT), set partitioning in hierarchical tree (SPIHT), Marmousi model

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