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研究生: 楊馥聰
Fu-tsung Yang
論文名稱: 植基於骨架的網格重製
Skeleton-aware Remeshing
指導教授: 賴祐吉
Yu-chi Lai
姚智原
Chih-yuan Yao
口試委員: 朱宏國
Hung-kuo Chu
學位類別: 碩士
Master
系所名稱: 電資學院 - 資訊工程系
Department of Computer Science and Information Engineering
論文出版年: 2012
畢業學年度: 100
語文別: 中文
論文頁數: 34
中文關鍵詞: 網格重製四角形網格骨架擷取網格分割調和函數流場設計
外文關鍵詞: Remeshing, quadrilateral meshing, skeleton extraction, meshpartitioning, harmonic function, line field design
相關次數: 點閱:222下載:3
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  • 在電腦圖學的領域裡,三維模型網格結構深深地影響著三維模型的紋理貼圖、模型壓縮、及多網格模型間應用之效能與成果。然而,現今透過三維掃描硬體設備所產生的三維模型,網格結構普遍具有不規則的問題。因此,為了改善三維模型網格結構的不規則性,三維模型的網格重製技術一值是電腦圖學裡相當重要且核心的研究議題。在本論文中,考量到奇異點的位置對於網格重製的成果品質有著嚴重的影響,我們提出了一植基於骨架的網格重製技術,根據骨架資訊自動化地切割模型網格,而不需要使用者人工切割路徑;另一方面,自動化地控制奇異點的位置以抑制奇異點對流場設計產生的不良影響,並產生較具規則性的四角網格以供應用。在我們所提出的方法裡,首先我們利用三維模型的骨架擷取技術找出三維模型的骨架與節點。接著,根據骨架與節點等資訊分割三維模型成為不同的種類的三維模型區塊。在不同種類的模型區塊上,我們用調和函數在三維模型上產生流場,並依流場重製網格結構。基於不同的三維測試模型,實驗結果證實我們的三維模型重製技術的網格一致性優於其他方法。


    Remeshing is the basic technique which reconstructs the surfaceof 3D models for many applications among the computer graphics andvisualization techniques. In this paper, we propose a novel remeshing method based on the skeleton of 3D model. The proposedremeshing method first extracts the skeleton of 3D model by usingthe mesh contraction. According to the skeleton, the 3D model ispartitioned into several kinds of divisions. Then, line field designis applied on the surface of each division to generate the newquadrilateral mesh. Unlike the conventional remeshing method, theproposedremeshing method automatically partitions the 3D modelbased on the skeleton instead of assigning patches by user. On theother hand, the proposed method also automatically controls wherethe singularities occur to prevent the drawback of singularities. Inaddition, We demonstrate that the proposed remeshing method couldimprove the 3D model quality for 3D movies, 3D animations, and manykinds of 3D applications.

    論文摘要 ii Abstract iii 目錄 iv 圖目錄 v 第一章緒論 1 1.1 研究動機與目的 1 1.2 研究內容與流程 5 1.3 論文架構 7 第二章相關文獻與探討 8 2.1 網格重製之種類 8 2.2 四角網格之處理 15 2.2.1 網格簡化 15 2.2.2 網格幾何最佳化 16 2.2.3 網格連通最佳化 17 第三章所提出之三維模型重製 19 3.1 網格收縮與骨架擷取 19 3.2 模型切割與網格合併 21 3.3 流場設計與網格重製 23 第四章實驗結果與討論分析 26 4.1 重製結果之展示 26 4.2 研究成果之分析 31 第五章結論與未來展望 32 參考文獻 33

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