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虚拟现实系统下基于错切—变形的三维地震数据场可视化方法研究
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摘要
三维地震数据体中蕴涵着地下岩层的丰富信息,以前由于没有合适的三维显示技术,人们只好利用一条条地震剖面和水平切片来显示三维地震数据。这样导致了大量信息的丢失,多年以前人们就认识到了这个问题,并指出了三维数据三维解释的出路。
     科学计算可视化是20世纪80年代发展起来的一门新学科,它运用计算机图形学和图像处理技术,将科学计算过程中及计算结果的数据转换为图形及图像在屏幕上显示并进行交互式处理。这样极大的提高了计算数据的处理速度和质量,实现了科学计算工具和环境的现代化。在科学计算可视化的研究领域,体绘制技术是一个重要的研究方向,具有较大的研究价值和应用前景。
     本文主要研究了在虚拟现实环境下基于错切-变形的直接体绘制方法,对基于透视投影的错切-变形算法进行了详细的论述,并给出了具体执行过程。此外还对虚拟现实技术及立体显示原理进行了介绍,并阐述了虚拟现实系统下可视化图像立体显示的实现过程。
The 3-D seismic data contains abundant information of terrane. In the past,there is notappropriate method which displays 3-D data, so people had to display 3-D seismic datawith many seismic sections and horizontal slices. This method leads to the loss of muchinformation,and people had realized this problem many years ago, therefore they advancedthe suggestion that explain 3-D data by using 3-D method.
     Scientific visualization is a kind of newly developed subject in the 1980s. It is basedon Computer Graphics and Image manipulation technology, and the calculation result willbe changed graphics image, which is displayed on the screen for interactive processing. Itgreatly improves the process speed and quality of calculated data, and realizes themodemization of scientific tool and environment. In the field of VISC, volume rendering isan important research topic, which has much research value and future application.
     This paper mainly researchs shear-warp algorithm of direct volume rendering invirtual reality,and introduces detailedly shear-warp algorithm which based on perspectiveprojection.Then,the process of performance is explained step by step .Furthermore, thispaper introduces virtual reality technology, and explains the principle which displays 3-Ddata. At last, the paper gives the process of virtual reality.
引文
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