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  • 學位論文

以環境遮蔽分析型變的多維度資料

Ambient Occlusion Analysis and Visualization of Deformed Volume Data

指導教授 : 謝東儒

摘要


以傳統一維、二維的方式觀測九二一集集地震的龐大資料會花費許多的時間,也缺乏一致性的觀察。在本篇論文中,我們使用多維度繪製 ( Volume Rendering ) 的方法來繪製由臺灣各地所記錄到的九二一集集地震量測資料和與模擬資料,希望比對這兩筆資料,從中分析出差異性,進而提供科學家從地震的多維度資料中發掘出有用的資訊。 然而,要以多維度的方式來比對兩組資料的差異性卻不是那麼容易,我們便利用環境遮蔽 ( Ambient Occlusion ) 的方式,對每一多維度像素 ( Voxel ) 計算其遮蔽特徵值,並配合資料的彎曲型變,用以找出其相異性。以我們方法彎曲型變,較長的邊被拉長放大,可以藉此放大資訊,以幫助觀察多維度資料的特徵,在由遮蔽頻譜的二維轉換函式輔助,確實從一些多維度資料找到資訊,也方便觀察。

並列摘要


We use volume rendering to render the 921 Chi-Chi earthquake measurement data and simulation data in order to provide an easy way for researchers to observe the 3D earthquake data. By comparing measurement data and simulation data, we try to find the differences to dig more useful information. However, it is not easy to compare the volume data sets directly, so we use ambient occlusion to compute the ambient value of each voxel and apply deformation which can help observe the heterogeneity.

參考文獻


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