基于折剖面的岩性自识别可视化控制算法研究

Visualization Algorithm of Automatic Lithological Recognition Based on Folded Cross Section Data

三维地质剖面因其可以对地质对象的内部表达和地质问题进行直观的展示,而成为三维地质建模的基础数据。为了将岩性符号准确、平滑地渲染到地质剖面上,研究一种剖面多边形自识别可视化控制算法,该算法基于折剖面展开数据,主要分为"剖面多边形自识别"和"岩性纹理映射控制"两部分;借助辅助平面,将复杂三维折剖面识别可视化控制问题,转化为二维多边形识别、岩性剖面数据组织和二维平面纹理映射等。纹理质量控制时采用了垂直双向步长控制参数,得到的岩性剖面更加准确和平滑。

3 D geological section is one of the basic data of geological modeling because of its intuitive display of the inner structure and problems of geological object. To exactly and smoothly render the lithological symbol to the geological sections,an algorithm is developed based on the polygon automatic recognition and visualization. The algorithm is based on folded cross section data,including automatic recognition of section polygon and lithological grain mapping control. Based on the parameter plain strategy,to transfer the complicated 3 D folded cross plain problems to the 2D polygon recognition,lithological section data organization and 2D plain grain mapping etc. To get more exactly and smoothly lithological section,vertical bidirectional step control algorithm is applied in grain quality control.