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npr | DRAKE

Meta

View Shuen-Huei Guan's profile on LinkedIn

BlogLook Score and Rank

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  • user warning: Table './drakegua_drake4/cache_filter' is marked as crashed and should be repaired query: UPDATE cache_filter SET data = '<p>Check out this cool gallery of NPR shaders by <a href=\"http://algorithmicarts.com/gallery/\">Algorithmic Arts</a>.</p>\n<p><a href=\"http://www.flickr.com/photos/drakeguan/2595762324/\" title=\"NPR Shader Gallery | Algorithmic Arts by DrakeGuan, on Flickr\"><img src=\"http://farm4.static.flickr.com/3038/2595762324_d6af42c970.jpg\" width=\"346\" height=\"500\" alt=\"NPR Shader Gallery | Algorithmic Arts\" /></a></p>\n<p>There are also several demonstrating <a href=\"http://algorithmicarts.com/gallery/npr-animation/\">videos</a>. A fabulous website and demo :)</p>', created = 1227249062, expire = 1227335462, headers = '', serialized = 0 WHERE cid = '4:11847a4f0460514e47260922310462db' in /home/drakegua/public_html/includes/cache.inc on line 109.
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  • user warning: Table './drakegua_drake4/cache_filter' is marked as crashed and should be repaired query: UPDATE cache_filter SET data = '<p>1994 年，University of Washington 的 <a href=\"http://salesin.cs.washington.edu/\" title=\"David Salesin\">David Salesin</a> 與 <a href=\"http://www.informatik.uni-trier.de/~ley/db/indices/a-tree/w/Winkenbach:Georges.html\" title=\"Georges Winkenbach\">Georges Winkenbach</a> 發表了一篇論文&ldquo;<a href=\"http://grail.cs.washington.edu/pub/abstracts.html#PenAndInk\" title=\"Computer-Generated Pen-and-Ink Illustration\">Computer-Generated Pen-and-Ink Illustration</a>&ldquo;，<a href=\"http://en.wikipedia.org/wiki/Non-photorealistic_rendering\" title=\"NPR @ wikipedia\">Non-Photorealistic Rendering （NPR）</a>這個技術名詞由此而生。NPR 是個非常迷人的技術，透過它，電腦不再只能計算出很 3D 或很真實的畫面來，它還可以像畫家一般，畫出各具特色的圖來。</p>\n<p><a href=\"http://www.flickr.com/photos/drakeguan/2330577689/\" title=\"Freestyle Gallery by DrakeGuan, on Flickr\"><img width=\"500\" height=\"421\" src=\"http://farm3.static.flickr.com/2139/2330577689_84ae9c1fb2.jpg\" alt=\"Freestyle Gallery\" /></a></p>\n<p>上圖是透過一個叫 <a href=\"http://freestyle.sourceforge.net/\" title=\"Freestyle\">Freestyle</a> 的軟體，創造出來的 NPR 圖，每一列的最左側是一個 3D 模型，右側則是幾個 NPR 線稿的例子。拿第一列來說，最左側是一個 <a href=\"http://en.wikipedia.org/wiki/Torus_knot\" title=\"Torus Knot\">Torus Knot</a> 的 3D 模型，第二張圖是它的 outlines，第三張是它的 silhouette，而第四張則是模擬出來的一種手繪線條。Freestyle 能產生出來的線稿不止這些，完全依使用者的創造力。</p>\n', created = 1227249062, expire = 1227335462, headers = '', serialized = 0 WHERE cid = '4:7ed714d030b028ae4e0be8889043ebb3' in /home/drakegua/public_html/includes/cache.inc on line 109.
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npr

NPR shaders by Algorithmic Arts

Check out this cool gallery of NPR shaders by Algorithmic Arts.

NPR Shader Gallery | Algorithmic Arts

There are also several demonstrating videos. A fabulous website and demo :)

Freestyle：NPR 下的 line drawing project

1994 年，University of Washington 的 David Salesin 與 Georges Winkenbach 發表了一篇論文“Computer-Generated Pen-and-Ink Illustration“，Non-Photorealistic Rendering （NPR）這個技術名詞由此而生。NPR 是個非常迷人的技術，透過它，電腦不再只能計算出很 3D 或很真實的畫面來，它還可以像畫家一般，畫出各具特色的圖來。

Freestyle Gallery

上圖是透過一個叫 Freestyle 的軟體，創造出來的 NPR 圖，每一列的最左側是一個 3D 模型，右側則是幾個 NPR 線稿的例子。拿第一列來說，最左側是一個 Torus Knot 的 3D 模型，第二張圖是它的 outlines，第三張是它的 silhouette，而第四張則是模擬出來的一種手繪線條。Freestyle 能產生出來的線稿不止這些，完全依使用者的創造力。

Shader Ball & Lit Sphere Shading

shading sphere

如果，開發像上頭這張圖所呈現的視覺效果，是很容易，而且可以隨著人的藝術創造力而有不同的變化，並且使用在 3D 動畫裏頭也很順利且自然的話，那該是件多麼有趣的事…

國寶總動員裏的宋朝工筆畫

國寶總動員有段故事橋段是這樣的…

嬰兒枕覺得玩轉心瓶有點無聊，剛好看到翠玉白菜上頭的螽蟴（ㄓㄨㄥ  ㄙ），於是很開心地把它抓了起來，急著拿去到處秀。第一個現寶的對像，就是住在一幅國畫--冬日嬰戲圖--宋朝--工筆畫--裏的姐弟倆…

我參與這個案子的任務之一，是不管用什麼手段，負責把嬰戲圖的樣貌搞定。為此，花了三個月的時間，整天和這些所謂的 NPR ( Non-Photorealistic Rendering ) 博鬥，最後，卻是使用合成的方式搞定一切（還好，我們有 Ahdee 這位天字一號的合成大師）。然後呢，這一篇還很幸運地，進了 SIGGRAPH 2007 research poster ( ACM Portal )。