非擬真算圖NPR(Non-Photorealistic Rendering)應用於3D電腦動畫之研究-以賽璐珞風格(Cel-shading)為例
Abstract
非擬真算圖技術NPR(Non-Photorealistic Rendering)是近年來在電腦繪圖CG(Computer Graphic)領域中發展相當快速之一項研究課題。不同與擬真式算圖PR(Photorealistic Rendering)致力於製作模擬真實世界的3D影像，NPR技術主要目的在以演算法自動產生模仿素描或水彩、插畫…等傳統繪畫媒材的筆觸、線條與質感，強調的是藝術、風格化甚於追求寫實感。
本研究在探討NPR(Non-Photorealistic Rendering)類型中用以模擬傳統動畫片的「賽璐珞風格」(Cel-shading)，在電腦動畫領域中的運用。相對於擬真算圖產生的3D逼真影像，非擬真性算圖使電腦動畫的創作表現中加入了許多人文溫暖及感性的元素，增加作品的情感、獨特魅力與多變性，使得動畫創作者多了一種工具建構其個人風格的異想世界。國外許多遊戲開發團隊也在此方面做了大量的嘗試和研究，更豐富了玩家的遊戲體驗。本研究在探討「賽璐珞風格」(Cel-shading)的興起與運用，更探究其豐富的視覺樣貌背後來自傳統動畫美學形式的影響。
關鍵字：電腦動畫，非擬真算圖，NPR，Non-Photorealistic Rendering，賽璐珞風格動畫，Cel-shading。
ABSTRACT NPR (Non-Photo-Realistic Rendering) is a new and quick-developed research topic in Computer Graphic. While PR (Photorealistic Rendering) produces 3D image which emulates real world, NPR generates image automatically by computer algorithms, of which its stroke, line, texture are similar to traditional pencil sketching, watercolor, and illustrating. The latter focuses on art and style itself rather than reaching realistic effect. Cel-shading is one type of NPR, used to emulates traditional animation. This research is to discuss the application of Cel-shading in computer animation. Opposite to PR that generates 3D images, NPR adds in humanistic, warm, and perceptual elements in the art work of computer animation. It enables the possibilities of humanity, uniqueness, and versatility. The animation producer can use it to construct his or her own wonderland. Many game developing teams in other countries has already made numerous attempts and research on NPR. They do enrich the playing experiences of the game buff. This study is to discuss the rise-up and application of Cel-shading, also to explore the influences of traditional animation aesthetics upon the rich visionary effects of Cel-shading.
ABSTRACT NPR (Non-Photo-Realistic Rendering) is a new and quick-developed research topic in Computer Graphic. While PR (Photorealistic Rendering) produces 3D image which emulates real world, NPR generates image automatically by computer algorithms, of which its stroke, line, texture are similar to traditional pencil sketching, watercolor, and illustrating. The latter focuses on art and style itself rather than reaching realistic effect. Cel-shading is one type of NPR, used to emulates traditional animation. This research is to discuss the application of Cel-shading in computer animation. Opposite to PR that generates 3D images, NPR adds in humanistic, warm, and perceptual elements in the art work of computer animation. It enables the possibilities of humanity, uniqueness, and versatility. The animation producer can use it to construct his or her own wonderland. Many game developing teams in other countries has already made numerous attempts and research on NPR. They do enrich the playing experiences of the game buff. This study is to discuss the rise-up and application of Cel-shading, also to explore the influences of traditional animation aesthetics upon the rich visionary effects of Cel-shading.
Description
Keywords
電腦動畫, 非擬真算圖, NPR, Non-Photorealistic Rendering, 賽璐珞風格動畫, Cel-shading