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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/53685
Title: | 非擬真影像與視訊繪製之管線化設計 A Pipeline Design for Non-Photorealistic Image and Video Rendering |
Authors: | Lu Xiao 肖璐 |
Advisor: | 盧奕璋(Yi-Chang Lu) |
Keyword: | 非擬真繪製,水彩畫,蠟筆畫,擴散,紋理,影像繪製,視訊繪製, non-photorealistic rendering (NPR),watercolor,crayon,diffusion,texture,image rendering,video rendering, |
Publication Year : | 2015 |
Degree: | 碩士 |
Abstract: | 傳統繪製是一種擬真繪製,力求生成像照片一樣真實的影像。而非擬真繪製通常側重於藝術風格的呈現,例如水彩畫、蠟筆畫等不以複製真實場景為目標的形式。 在本篇論文中,我們提出了一種新的水彩畫繪製流程,其中涉及顏色空間轉換、均值移動分割、形態學、顏料擴散、邊緣檢測、顏色變化以及紋理添加等一系列演算法。另外在水彩畫繪製流程的基礎上,僅改變流程的後半部份,我們又設計了蠟筆畫繪製流程,並針對蠟筆畫的特點提出了一種蠟筆紋理添加法。 非擬真視訊繪製是非擬真影像繪製的延伸,然而,如果僅將相關繪製技術直接應用於視訊的每一幀,會導致視訊具有較多的晃動等幀間不連續問題。我們提出了一種新方法,在特定場景中,利用我們改進的快速視訊分割演算法對視訊進行共同背景提取,對背景和移動物體使用不同大小的窗格分別進行繪製,再進行融合,可以很好的解決幀間的晃動問題。 Non-photorealistic rendering (NPR) and physically-based rendering (PBR) are two distinct rendering technologies. NPR is to express a certain artistic style, while PBR is to provide a vivid viewing experience. In this thesis, we propose a new NPR pipeline for watercolor. A series of algorithms are used in the pipeline, including color space transformation, mean shift segmentation, morphology, color diffusion, edge detection, color and texture mapping. By modifying the second half of the watercolor pipeline, we also propose a crayon pipeline where crayon textures can be added to the image. Non-photorealistic video rendering is the extension of non-photorealistic image rendering. However, if we naively apply the NPR technique for images to each frame of the video, it will cause discontinuity problems between frames. Thus we propose to use a fast video segmentation algorithm to extract the common background in a video. With the help of the background mask, background and moving objects can be rendered respectively, and then combined together. By using this method, the video discontinuity problem can be greatly mitigated. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/53685 |
Fulltext Rights: | 有償授權 |
Appears in Collections: | 電子工程學研究所 |
Files in This Item:
File | Size | Format | |
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ntu-104-1.pdf Restricted Access | 7.63 MB | Adobe PDF |
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