【摘要】 以敦煌壁画为研究背景,结合壁画特有的背景知识及艺术风格,提出了一种面向壁画的线描图提取算法.首先通过L0图像范数进行图像全局平滑;然后进行高频提升滤波,构造出边缘切向流场;最后利用改进的FDo G滤波器抽取出具有增强效果的线条图.利用文中算法进一步完成计算机辅助临摹系统的设计与开发,使用Surface Pro作为开发平台,用触摸笔、手来代替鼠标,提供包括壁画轮廓线提取、线描推荐和壁画临摹等功能.实验结果表明,采用该算法后,即使是完全没有绘画基础的用户也能临摹出比较好的壁画,不仅能够增添用户临摹的乐趣,还能帮助用户学习壁画绘画的技巧,同时还对敦煌壁画起到了数字化保护的目的.更多还原

【Abstract】 Taking Dunhuang fresco as the research background, we design a fresco-oriented line drawing extraction algorithm combining with the fresco-specific background knowledge and artistic style in this paper. L0 image norm is used to remove the unimportant details, and an improved FDo G operator is posed to extract the image contour. Based on our line drawing extraction algorithm, we further design and develop a fresco-oriented computer aided copying system which provides the functions such as layer management, mural contour extraction, murals copying, and so on. The results and the evaluation show that even users who do not have basic painting skills can copy better. The system can not only bring much fun for users, but also can protect Dunhuang’s fresco.更多还原