改进的图标法进行平面向量场可视化  

Planar Vector Fields Visualization Using Improved Icon Method

作　　者：陈丽娜[1] 

机构地区：[1]河南商丘师范学院计算机与信息技术学院,河南476000

出　　处：《网络安全技术与应用》2013年第4期61-62,13,共3页Network Security Technology & Application

基　　金：河南省教育厅项目(2010A520031;2011B520031)

摘　　要：图标法是常见的平面矢量场可视化方法。但是当传统的图标法用在大数据集且变化不是很明显的矢量场中时,图像可能会显得比较混乱。本文基于矢量场中局部矢量近似平行的原理,将传统的图标法做一改进。将局部范围内变化不明显的矢量,用该范围内的某一矢量来代替,这样所得的图像不再是规整的图标图像,图像上图标的多少是由矢量变化的明显程度来决定的。矢量变化不大的地方,矢量图标少,反之,矢量变化较大的地方,矢量图标多。这种方法使得所显示的矢量场不显得混乱,又能表达出矢量场的方向和大小。Icon method is a common planar vector field visualization method.But when the traditional method is used in the vector field that its change is not very obvious and large data sets,the image may seem rather confused.This paper makes improve to traditional icons based on the principle of vector field vector local approximate parallel.The improvement is to use a certain vector to replace those vectors that their change are not obvious in a certain region,the result image is not structured icon image,but the amount of icon is according to the extent of change of vector direction.Less change the vector,less the vector icon,otherwise,larger change the vector,more the vector icon.This method makes the result vector field is not confused,at the same time,it can also display the direction and size of the vector field.

关 键 词：可视化 矢量场 图标法 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]