基于数据场相关性的光线投射算法

Ray Casting Based on the Coherence of the 3D Data Field

光线投射算法是体绘制中的经典方法。这一算法具有结构清晰，实现便利的特点。但简单的光线投射算法存在采样效率低和绘制精度低的缺点。本文利用数据场的相关性和不等步长的采样方法来改善光线投射算法的品质，使它既具有快速的优点又具有较高的成象精度。

Abstract Ray casting is a classic algorithm of Volume Rendering. This method has the advantages of clear structure and easy to be accomplished. But simplify ray\|casting algorithm exists some weakness: low resampling efficiency and low image accuracy. This paper utilizes the coherence of 3D data filed and resampling with unequal step to improve the image quality of traditional ray\|casting method and reduce the rendering time.