研究生: |
葉展岱 Chan-Tai Yeh |
---|---|
論文名稱: |
多層紋理重組 Texture Matting |
指導教授: |
陳煥宗
Hwann-Tzong Chen |
口試委員: | |
學位類別: |
碩士 Master |
系所名稱: |
電機資訊學院 - 資訊工程學系 Computer Science |
論文出版年: | 2008 |
畢業學年度: | 96 |
語文別: | 英文 |
論文頁數: | 45 |
中文關鍵詞: | 紋理重組 、影像組合 、法向量平面 |
外文關鍵詞: | Texture Synthesis, Image Matting, Normal Surface |
相關次數: | 點閱:68 下載:0 |
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本論文的主要目的是將多層次的紋理片段,重組於單張圖片中的物體表面。我們提出了一個新的紋理合成方法,針對多層次的半透明紋理,能夠合成出效果更為逼真的紋理。整體的處理架構可以分成兩個部份:首先,我們必須將小張的多層次紋理樣本,重組成更大的紋理影像;其次,以每一個像素為單位,計算出其各自的法向量,並以法向量的方向為基準,將法向量相似的像素聚合成單一平面,作為紋理重組的基本單位。和之前方法的不同之處,是我們在重組紋理片段時,不將其視為單層的紋理,而是將重疊區域視為多層片段的堆疊,依據每一個像素的前景機率做處理,並保留每一單層片段的紋理特徵。在平面法向量的推算過程中,我們試圖重建出一個近似的物體表面結構,並將多層次紋理依據平面法向量重組在物體表面上。除此之外,我們還可以將具有不同紋理的物件作結合,利用其前景機率產生各種不同的視覺效果。
The aim of this work is to transfer natural layered textures onto an unknown surface shown in a single image. The process of transferring textures can thus be divided into two parts: First, we need to recover the surface normals from the input image; second, we use a small template of natural texture to synthesize a large texture map, and then try to transfer it onto the surface according to the recovered surface normals. To produce visually pleasing results of texture transfer, we introduce a novel method of texture transfer called ''texture matting'' which can deal with layered texture and preserve their transparency to represent the layered effect.
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