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.