中国彩绘书画的颜色特征分析及虚拟修复

Color Characteristics Analysis and Restoration for Chinese Painting and Calligraphy

摘要: 敦煌壁画是我国灿烂辉煌的绘画史中最为浓墨重彩的一笔，经过千年的风雨洗礼，大部分壁画正在面临褪色、变色等问题。敦煌壁画的保护性研究主要针对褪色和变色区域修复，提出一种基于L*a*b*颜色空间实现颜色分割的虚拟修复方法。该方法首先分析不同时期壁画常用颜料及其主要特征，归纳总结不同颜料褪色、变色的规律，得到壁画常用颜料的褪色、变色机理；其次，利用L*a*b*颜色空间实现褪变色壁画的颜色分割，同时利用Photoshop软件在Lab模式下对壁画进行虚拟修复，通过改变L曲线、a曲线和b曲线调整壁画色貌。本文的复原结果得到专家的认可，对壁画虚拟修复提供了一定的参考。

Abstract: The Dunhuang murals are the most colorful part of China’s brilliant painting history, after a thousand years of exposure to the elements, most of them are facing problems such as fading and discoloration. The conservation study of Dunhuang murals focuses on the restoration of faded and discolored areas, and proposes a virtual restoration method based on L*a*b* color space to achieve color segmentation. The method first analyzes the common pigments used in murals of different periods and their main characteristics, summarizes the laws of fading and discoloration of different pigments, and obtains the mechanism of fading and discoloration of common pigments used in murals; second, uses L*a*b* color space to realize the color segmentation of faded and discolored murals, and at the same time uses Photoshop software in Lab mode to virtually restore the murals by changing the L curve, a curve, and b curve to adjust the color appearance of the mural. The restoration results of this paper are recognized by experts and provide a certain reference for the virtual restoration of murals.