Study Of Visualizing Algorithm Of 3-D Seismic And Topography Data

Scientific Visualization is an important technology in the fields of exploitation of geoloy and petroleum, reconstruction of 3-D topography. Application the Scientific Visualization technology of 3-D seismic data, researchers can interpret original seismic data exactly, so can get the important information of position and reserves of mineral resources. Also application the Scientific Visualization technology of 3-D grid data of topography, researchers can get the wave of topography.The traditional algorithm of Volume Rendering is Ray-Casting, not a proper algorithm for the large 3-D seismic data, referring some improved method and considering the characteristic of seismic data, a new fast Ray-Casting algorithm of oriented image space and negative-view transform was brought forward. As a result, this algorithm excels the traditional obviously by speed with image quality in experiment. Grid hiding and break line cut are difficult point in displaying of 3-D grid data, the thesis also presented a new visualizing algorithm applicable for 3-D grid data of topography-Sliced Polygon Filling. The experiment result shown, contrasting to Floating Level, this algorithm excels in both time complication and effect of grid hiding and break line cut.Aiming at studying algorithm of 3-D seismic data and 3-D grid data of topography, a interactive visualization system of 3-D seismic and topography data was discussed. The system main realized interactive rendering of 3-D seismic data, interactive rendering of three crossed slices, interactive rendering of rand-cutting face and interactive rendering of 3-D topography grid data.