基于矢量线强化的增强型2维流场实时绘制

在流场绘制中,合理地结合矢量场的多种属性有助于矢量场的特征分析,据此提出了一种基于矢量线强化的增强型2维流场实时绘制算法。通过对流场的一些标量属性如大小、角度和曲率进行色彩映射,该算法不仅可以清晰显示流场运动方向,而且能显示矢量场的多种属性,有助于了解流场矢量特征分布和主要拓扑结构。该算法采用了一种矢量线强化策略,即通过对卷积纹理在垂直矢量方向上进行1维高通滤波,增加了矢量线间的对比,改善了图像质量。利用现代图形卡的可编程能力,该算法可以在微机上达到实时绘制性能。

Enhanced Real-time 2D Flow Visualization Based on Flow Lines Enhancement

Considering that some helpful scalar properties to vector visualization with feature analysis,in this paper we present an enhanced realtime 2D flow visualization algorithm based on flow lines enhancement.Through the color mapping of some scalar properties,such as velocity,angle and curvature,it can not only reflect flow direction,but also display many properties of vector field which are helpful to analyze the features and topology of vector fields.In order to enhance the contrast among flow lines and improve the rendering image quality,it adopts a scheme of enhancing flow lines which applies one dimensional high-pass filter to convolution texture along the direction perpendicular to flow.By using the programmable ability of modern GPVS,the algorithm can achieve realtime rendering performance on Personal Computers.