三维地震数据体的切片播放算法
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摘要
目前三维数据可视化技术已经广泛应用于地震解释中,而绝大多数的三维地震解释,是通过数据体的切片实行的。切片显示步骤是:确定切面多边形、对数据体的重采样和图像合成、切片的图像绘制。并且通常需要对切片实现播放、缩放等操作,此时,对于有限的内存采用传统的方法实现庞大的三维地震数据体的切片播放是相当的困难的。文章提出了一种将三维地震数据进行分块存储及显示的技术,即三维数据的砖块组织结构,并建立了快速索引机制,及砖块结构的调度算法。实验证明,该算法对三维地震数据切片的播放具有实时性及高效性。
At present,three-dimensional data visualization technology has been widely applied in seismic interpretation,however most of 3D seismic data is interpreted through the slices of the volume.The traditional display steps of slices were as follows: determine the section polygon,re-sample data and compound the image,rendering the slice images.Also,it needs to achieve operations with these slices such as playing,zooming,etc.Simultaneously,it is quite difficult for the limited memory to realize the play of slices of huge 3D seismic data.Therefore,a technology is proposed which stored and display 3D seismic data in blocks.It means the brick structure of 3D seismic data.The mechanism for fast indexing scheduling algorithm of brick structure is established.Experiments show that the algorithm is real-time playback and efficiency for three-dimensional slice of seismic data.
At present,three-dimensional data visualization technology has been widely applied in seismic interpretation,however most of 3D seismic data is interpreted through the slices of the volume.The traditional display steps of slices were as follows: determine the section polygon,re-sample data and compound the image,rendering the slice images.Also,it needs to achieve operations with these slices such as playing,zooming,etc.Simultaneously,it is quite difficult for the limited memory to realize the play of slices of huge 3D seismic data.Therefore,a technology is proposed which stored and display 3D seismic data in blocks.It means the brick structure of 3D seismic data.The mechanism for fast indexing scheduling algorithm of brick structure is established.Experiments show that the algorithm is real-time playback and efficiency for three-dimensional slice of seismic data.
引文
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[2]张二华,高林,马仁安,等.三维地震数据可视化原理及方法[J].CT理论与应用研究.2007,16(3):20-28.
[3]Xue Daq ing,Roger Crawfis.E ffic ient Splatting UsingModern Graphics Hardware[J].Proceed ings of theComputer Graphics,Imaging and V ision:NewTrends,2005,8(3):1-21.
[4]David Laur,Hanrahan P.H ierarchical Footprintmethod:A Progressive Refinement A lgorithm forVolume Rendering[C].New York,NY,USA:ACM SIGGRAPH Computer Graphics,1991:285-288.
[5]夏凡.地震数据处理系统中三维可视化的研究与实现[D].成都电子科技大学,2010.
[6]Peter Lindstrom,Valerio Pascucc i.V isualization ofLarge Terrains Made Easy[C].In:Proceed ings ofthe IEEE V isuali-zation 01,2001,363-371.
[7]Dachsbacher C,Stamm ingerM.Rendering Procedur-al Terrain by Geometry ImageW arp ing[C].In:Pro-ceed ings of the Eurographics'04,2004,103-110.
[8]Hua Y i-X in.Theory and Technology of GeographicsInformation System[M].Being:PLA Press,2001:1-2.
[9]钟晓霞.大范围复杂场景的简化与漫游技术研究[D].南京理工大学,2003.
[10]张伟.显微图像拼接系统设计与实现[D].北京邮电大学,2009.
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