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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/8585


    Title: 外觀守恆及視點相關的多重解析度模塑;Appearance-preserving View-dependent Multiresolution Modeling Using QEM
    Authors: 楊璿;Xuan Yang
    Contributors: 資訊工程研究所
    Keywords: 視點相關;多重解析度模塑;外觀守恆;appearance-preserving;view-dependent;multiresolutiom modeling
    Date: 2002-06-27
    Issue Date: 2009-09-22 11:31:08 (UTC+8)
    Publisher: 國立中央大學圖書館
    Abstract: 多重解析度模塑技術已經廣泛的應用在地形展示、飛行模擬、科學視覺化、及電腦遊戲上。目前在繪製一個3D埸景時,大部分的應用程式都使用了很多的三角形來構成複雜的3D埸景,因而使得繪圖效能受到埸景中三角形數目的影響而下降。多重解析度模塑技術是一種在繪製複雜3D埸景時可以維持繪圖效能的技術。然而這個技術在低解析度的情形下並無法完整保存3D埸景的模型的形狀及其外觀屬性。 在這篇論文中,我們修改了一個以二次式誤差 (Quadric error metrics)為準則的多重解析度模塑技術加入了模型的外觀屬性,如顏色、法向量、及貼圖座標資訊,使得簡化後的模型有著高品質的多重解析度模形外,還能保持和原始模型相似的外觀。 視點相關展示技術是一種可以更進一步改善多重解析度模形展示效能的方法。在我們的研究中,我們也加入了視點相關展示技術,根據視點參數,使多重解析度模形能夠在相同展示效能下,展示更精細的模型或在相同展示品質的模型下,提供更好的展示效能。 Multiresolution modeling techniques have been applied in terrain visualization, military simulation, flight simulation, and other simulations for many years. The number of triangles of models influences the 3D rendering performance significantly and most applications generally use a large amount of triangles to render the simulation environment. Using the multiresolution technique is one way to archive the real-time rendering for the large-scale environment; however, most multiresolution techniques did not consider the appearance of the environment, then the shapes of the models and environment are degraded during lower-resolution rendering. In this paper, we presented a multiresolution modeling algorithm using quadric error metrics and provide the error metrics with the appearance attributes of a model such as color, normal and texture coordinates to rapidly obtain multiresolution models with high qualities. The view-dependent technique is one way to further improve the rendering performance of multiresolution models. In this study, we also provide the view-dependent technique for automatically deciding the proper resolution and model structure based on the view parameters to archive a real-time visualization.
    Appears in Collections:[資訊工程研究所] 博碩士論文

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