非真实感油画绘制中明暗色调获取方法研究  

Research of Catching Hue in Non-photorealistic Canvas Painting

作　　者：辛玲[1] 王相海[1,2] 

机构地区：[1]辽宁师范大学计算机与信息技术学院,大连116029 [2]南京大学计算机软件新技术国家重点实验室,南京210093

出　　处：《计算机科学》2008年第12期216-219,共4页Computer Science

基　　金：辽宁省高等学校优秀人才支持计划(RC-04-11);辽宁省自然基金项目(20072156);辽宁省教育厅科学技术研究项目(20060486);南京邮电学院图像处理与图像通信江苏省重点实验室开放基金项目(ZK207006)资助

摘　　要：作为与真实感图形学相对应的图形学分支,近年来非真实感图形学的发展受到人们的关注并已成为计算机图形学的研究热点之一。然而,非真实感绘制作为一个新的研究领域在很多方面还处于不断发展之中。在非真实感油画的绘制中,场景中明暗色调的合理性和协调性直接影响到最后生成画面的效果。对非真实感油画绘制中明暗色调的获取方法进行研究,提出一种基于小平面片的色调信息提取方法。该方法假设场景中客体表面均匀覆盖了一层大小相同的正方形"小平面",这些小平面起到了"提取器"的作用。通过计算这些小平面被遮挡的明暗信息和近似的镜面反射信息等来确定小平面所在位置的色调信息,在绘制过程中利用这些色调信息在相应位置上绘制"笔触",从而保证了所生成油画画面场景整体色调的合理性。所提出的方法结构简单、计算速度快,同时可方便实现对场景中局部信息的调整。实验结果验证了所提出方法的有效性。As a branch of graphics corresponding to reality graphics, the development of non-photorealistic graphics is obtaining attention these years and has become a hotspot in the research. However, non-photorealistic painting as a new research field, is developing in many aspects. In the non-photorealistic canvas painting, the rationality and compatibility in scene directly affect the effect of the last created menu. Discussed the methods of catching hue in non-photorealistic canvas painting, and put forward a method of extracting hue information based on little patch. This method supposes the surface of objects in scene is symmetrically covered with a layer of the same size square little patches, these little patches act as an extractor, by computing the sheltered hue information and the approximate mirror reflection information, etc. of these little patches to confirm the hue information of the little patches in these position, using this hue information to paint brushstroke at the corresponding position in the process of painting, thereby ensures the rationality of the whole hue in created canvas scene. The method has advantages of simple structure and fast computation speed,and could sim- ultaneously adjust local information in scene expediently. Simulation results show it is effective.

关 键 词：非真实感 小平面片 色调信息 笔触 

分 类 号：TP317.4[自动化与计算机技术—计算机软件与理论] TU238.2[自动化与计算机技术—计算机科学与技术]