计算机图形学反走样技术及实现

计算机图形学反走样技术及实现 ANTIALIASING TECHNIQUE AND APPLICATIONS IN COMPUTER GRAPHICS 沈强 Shen Qiang 1 first-author 张波 Zhang Bo 1 陈淑珍 Chen Shuzhen 1 孙晓安 Sun Xiaoan 1 武汉大学电子信息学学院 武汉大学电子信息学学院 College of Electronic Information,Wuhan University College of Electronic Information,Wuhan University 介绍了在计算机图形学中存在的走样问题，从频域的角度剖析了其产生的机理，阐明了反走样技术实现的基本原理和常见的实现方法，并对二维滤波的反走样技术作了细致的分析．通过对取样体积数值积分的数学推导，提出了二维圆锥形滤波器的关键参数的提取方法，并将此参数运用于消除显示直线时产生的锯齿现象，结合直线的中点画线法，在微机上用程序实现了直线的反走样图形算法，结果表明，此算法取得了令人满意的效果 Antialiasing problem in computer graphics is introduced. This paper analyzes the causes of aliasing in the view of frequency field, and explains how antialiasing technique is usually actualized,and some methods are presented. Two dimension filter antialiasing method is analysed in detail. Key parameters of two dimension cone filter are deduced by sampling bulks numerical integration. With the parameters and middle point drawing line algorithm,an antialiasing algorithm in drawing line is implemented,which comes out with fine effect in computer. 计算机图形学 走样 采样 滤波 圆锥形滤波器 computer graphics aliasing sampling filter cone filter TP391.41 国家教委面向二十一世纪教学改革科研基金 1997-01-01 2021-04-01 1