一种基于图像的快速点画法

点画法是将微小而密集的点均匀而随机地排列,以点的疏密产生明暗色调和纹理,手工完成点画通常需要耗费艺术家相当长的时间,由计算机生成点画效果是非常有必要的,而其中关键问题就是如何快速合理地产生点的分布。提出一种由数字图像快速生成点画效果的算法,算法能够在不规则区域快速地产生均匀而随机的点。首先根据灰度值将图像划分为多个区域,然后利用密度函数在不同的区域产生不同密度的点,为了能够突出图像特征,对图像的特征区域和非特征区域采用不同的处理方法。实验结果表明利用算法可以快速产生接近人类手工作品的点画。

A Fast Image-based Method of Stippling

The artistic technique of stippling is to place small dots of ink onto paper evenly and randomly,which gives the impression of tone and texture.It always takes artist long time to complete a stippling drawing,so it is necessary to generate stippling style by computer quickly.The key problem is to distribute dots reasonably to produce even tone and avoid artifacts.This paper presents a fast method to produce stippling style from input image,which can distribute dots evenly and randomly in arbitrary areas.Fir...