基于自适应镶嵌的地震剖面数据可视化方法

A seismic section data visualization method based on adaptive tessellation

地震剖面数据三维可视化可以比传统地震剖面显示更好地展现地震数据信息,但在网格镶嵌方面存在镶嵌错误的问题。为解决错误镶嵌问题,本文提出了新的低倾斜相关自适应镶嵌方法,首先在像素着色器中计算出下一道上与当前样点最相关的样点;然后将其在时间方向上的相对偏移映射为倾斜方式并渲染到纹理,填充顶点索引时,充分考虑同一道上相邻样点的倾斜方式以实现顶点的自适应镶嵌;最后,通过实验验证了所提方法的有效性。

Compared with the traditional method,3D visualization of seismic data can reveal seismic information better,but it has the deficiencies of incorrect tessellation during tessellating.To solve the incorrect tessellation problem,a new low dip correlate adaption tessellation method is proposed.First,find out the seismic sample point in the next trace which has the largest relevancy to the current one in pixel shader;then,map its relative offset in time direction as the dip style of the current point and render it to texture,and when filling vertices indices,consider the dip style of the points adjoin to the current one roundly to realize the low dip correlate adaption tessellation of the vertices.Experimental result proves the effectiveness of the proposed method.