Simulating Chinese Painting Using Procedural Shaders

以程序性著色模擬中國水墨畫

謝啓民(Chi-Min Hsieh) ； 鐘世凱(Shih-Kai Chung)

《立德學報》 5卷2期 (2008/06) Pp. 78-94

https://doi.org/10.7080/JLU.200806.0078

摘要

中國繪畫之氣韻生動，由於其難以模擬的氣勢與技法，在電腦繪圖的世界舞台上，極爲少見，然而其獨有的美學價值與文化特色，若因此而況寂，實爲日新月異的電腦動畫領域之一大遺憾。有鑑於此，無論爲發揚中國繪畫藝術，或爲拓展3D動畫更覓廣的視野，本論文之主要研究方向，即是企圖以電腦動畫技術呈現具中國繪畫之特有影像風格。本研究探討以非寫實性的電腦算圖，來呈現中國水墨畫的影像風格。依照電腦動畫的製作流程，在模型製作上，以「每一筆觸即是一個物件」做爲塑模原則；在燈光上有「關閉燈光」及「將燈光視爲對比程度的參數」兩種設定；而在著色演算時，藉著「輪廓線的判定」，「以Depth map修正輪廓線」，並搭配「墨色渲染演算」三個步驟模擬中國水墨畫的墨色呈現；最後，再結合紙賬色彩及材質的特性，合成處理之後，得到具有中國水墨畫風格之影像。

關鍵字

非寫實性算圖 ； 中國水墨畫 ； 程序性著色 ； 飛白 ； 邊緣輪廓判定

並列摘要

The imposing manner and vibrant tone of both Chinese painting are rarely seen on the world stage of the computer graphics due to the difficulty in simulating their style and techniques. However, it will be a pity for the changeful field of computer animations if the unique aesthetic value and cultural characteristic fade into silence just because of the lack of innovations. Therefore, this paper will emphasize how to show the special image style of Chinese painting in computer animated techniques in order to promote the art of Chinese painting as well as to widen a broader view of three-dimensional animation.
The research of this paper is discussing non-photorealistic rendering (NPR) by using computer graphics to express the image style of Chinese painting. The applied method is on the basis of production pipeline of computer animation. The modeling principle is ”every stroke is viewed as an object.” The tips of the light control are divided into ”turned-off light” and ”light regarded as the parameter of the contrastive degree”. As for shading rendering, the following four shading procedures are being manipulated to simulate the approach of Chinese painting to display the ink color: ink color layer, silhouette diffusion layer, fei-bai layer, and scenic-depth layer. At last, the picture will be synthesized and, at the same time, match the paper's color and material quality to regain the image of Chinese painting style.

並列關鍵字

Non-photorealistic Rendering ； Chinese Painting ； Procedural Shader ； fei-bai ； Silhouette Extraction