中國水墨畫的渲染技法之研究

Abstract

在中國水墨畫中，水扮演了重要的角色。簡單如濃墨、淡墨的表現，複雜如墨在紙上渲染出各式不同的形狀與墨色，水的運用使畫中的筆觸變化萬千。由於水的多變性及複雜的流動，水的模擬成為圖學中最具挑戰性的項目之一。雖然很早便有人對墨在紙上的渲染現象進行研究，但是許多複雜效果的模擬和擬真度始終無法有所突破。在本篇論文中，我們結合了物理的理論以及現象的觀察分析，提出一個模擬真實渲染效果的方法。根據這個模型，除了能模擬在不同特性的紙張上不同墨色的表現之外，模擬多種乾濕濃淡等不同筆觸混合的表現更是我們的重要貢獻之一。

ABSTRACT Water plays an essential role in expression of Chinese Ink Paintings, such as some simple effects of dense brush and dry brush, and various kinds of shape and color intensity of strokes after ink diffused in the paper. Varied kinds of strokes can be implemented by controlling water in different ways. Simulation of water behavior is among the most challenging aspects in the field of computer graphics due to water’s multiformity and complex patterns of motion. Although simulation of ink diffusion in the paper has been researched in computer graphics a long time ago, methods for simulating complex effects of ink diffusion have not been proposed and the simulated images are not realistic enough. In the thesis, we present a method to simulate the ink diffusion effects based on observation and analysis of the physical phenomenon. Using this method, we can simulate various expressions of tones on different kinds of paper. The effect of mixture of simulated strokes in different kinds of brushes is one of the important contributions in our method.