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| 研究生： |
黃嗣心 Huang, Ssu Shin |
|---|---|
| 論文名稱： |
使用適應性直方圖均衡化之加速與風格化淺浮雕生成 Fast and stylized bas-relief generation using adaptive histogram equalization |
| 指導教授： |
紀明德
Chi, Ming Te |
| 學位類別： |
碩士
Master |
| 系所名稱： |
理學院 - 資訊科學系 |
| 論文出版年： | 2012 |
| 畢業學年度： | 101 |
| 語文別： | 中文 |
| 論文頁數： | 51 |
| 中文關鍵詞： | 淺浮雕 、適應性直方圖均衡化 、幾何生成 、非相片寫實電腦繪圖 |
| 外文關鍵詞： | bas-relief, adaptive histogram equalization, geometry generation, non-photorealistic rendering |
| 相關次數： | 點閱：51 下載：3 |
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浮雕是雕刻藝術中重要的表現方法，藉由在平板上雕刻出高低落差，傳達出豐富的形狀視覺線索，是介於3D雕塑和2D畫作中間的一種物體外形的表現方式。本論文將針對淺浮雕這類型相對高度較低的浮雕技法，將要表達的3D場景壓縮到接近平面但盡可能保留細節。我們使用適應性直方圖均衡化技術去壓縮高度的動態範圍並盡可能強化細節，且經由降低取樣點數量的技巧加速適應性直方圖均衡化的計算，以利於使用者進行互動性自訂風格化。另外依照場景特徵的流向，增加特殊的刻紋去豐富淺浮雕的風格表現。
Relief is a sculptural technique to express the shape feature on a flat surface. It is an art medium between 3D sculpture and 2D painting. In this thesis, we focus on bas-relief, which is a relatively low relief to compress the depth of 3D scene to a shallow overall depth and preserve details of the shape. We use the adaptive histogram equalization (AHE) to compress the depth range and enhance details, and accelerate the AHE computation by sample reduction, which is in favor of the user interaction of custom stylization. Furthermore, adding special carving patterns according to feature flows of the scene enriches the stylization of the relief generation.
第一章 緒論 1
1.1 研究背景與目的 1
1.2 問題描述 3
1.3 論文貢獻 3
1.4 論文章節架構 4
第二章 相關研究 5
2.1 色調映射與直方圖均衡化 5
2.2 浮雕生成 6
2.3 Non-photorealistic Rendering 7
第三章 研究方法與步驟 8
3.1 方法流程 8
3.2 場景前處理 10
3.3 適應性直方圖均衡化於浮雕之應用 10
3.3.1 直方圖均衡化(Histogram Equalization, HE) 10
3.3.2 適應性直方圖均衡化(Adaptive Histogram Equalization, AHE) 11
3.3.3 加權AHE 12
3.3.4 對比限制AHE(Contrast Limited AHE, CLAHE) 14
3.4 AHE之改進 16
3.4.1 輪廓限制 16
3.4.2 取樣與內插 16
3.5 風格化生成 19
3.5.1 Edge Extraction與距離轉換 20
3.5.2 刻紋中軸線 21
3.5.3 刻紋合成 23
3.6. 浮雕生成 28
第四章 實驗結果 29
4.1 實驗環境與效能 29
4.2 品質檢測 33
4.2.1 PSNR 33
4.2.2 SSIM 34
4.3 剖面圖分析 35
4.4 風格化 41
第五章 結論與未來工作 47
5.1 結論 47
5.2 未來工作 48
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