Volume Rendering Of 3d Seismic Data Field, And Hybrid Rendering Method Study

We get huge 3-D seismic data through 3-D seismic data acquisition and processing, the data need to be converted into images and interpreted in order to be useful. The traditional method is to use the seismic profile and slice to explain the data and speculate the underground strata form and structure, this approach has great limitations. In recent years, Visualization in Scientific Computing(Visc) has applied to the field of 3-D seismic interpretation, it enable us to show the 3-D seismic image by using a volume rendering method ,thus resulting the three dimensional data of three dimensional interpretation, it greatly improve the efficiency and accuracy of the interpretation. Hybrid rendering is to render the volumes and the geometric objects simultaneously in one image. It is an important technology in scientific visualization and is essential in many cases. This thesis has studied these two issues: volume rendering and hybrid rendering. The work completed consists of:(1)Data classificationData classification is the first step in the volume rendering procedure, the data of different field has different classification method. According to the characteristics of the seismic data, several classification methods are proposed.(2) Analysis and implementation of volume rendering based on ray castingRay casting is an effective method for volume rendering ,it's an important content of this thesis. We study the principle and implementation of this algorithm in this thesis ,and propose some improvement and optimization according to the characteristics of the seismic data.(3)Hybrid renderingRendering geometric objects and volumes together is always an important area in scientific visualization. Based on the work of predecessors, we proposed a combination hybrid rendering method. The algorithm operates directly on the original data representations, thereby eliminating the conversion artifacts exhibited by other methods. Experiments show that the algorithm can properly visualize volumes, polygons combined scenes, and is an effective method for hybrid rendering.