不规则地质体的分割与体绘制方法研究

提出一种基于局部信息的区域增长方法(LI—RGA)，该方法克服了最小偏差区域增长算法(R—RGA)中一致性准则函数定义的模糊性问题．实验结果证明，算法的分割准确性有所下降，但基本上不影响对不规则地质体的解释和分析工作．针对地震数据的特点，对传统光线投射算法进行了简化，并将分割出的不规则地质体定义成区域模板，再与改进的光线投射体绘制算法结合起来．实验证明，此方法能够清晰地再现数据体中的不规则地质体，并能同时显示重要的地质特征体．

Research on Segmenting and Volume Rendering of Irregular Seismic Events

A new local-information-based segmenting method (LI-RGA) of irregular seismic events is given This method solves the fussy decision of homogeneity criteria in minimum-variance-based region growing algorithm (R-RGA) and the very slow segmenting in the assessment-function-based region growing algorithm (RM-RGA) The segmenting precision of LI-RGA is not so good as the RM-RGA, but the precision is enough to interpret of irregular seismic events According to the features of seismic data, the traditional ray-casting algorithm is modified, and the displaying time is saved By defining segmented regions as a mask, then combining them with the advanced ray casting algorithm to change the transfer function, the irregular seismic event can be rendered definitely The test result proves that this method is more effective than the traditional ray-casting algorithm, and can construct and display unidentifiable irregular seismic events of data set and other important seismic events