Abstract: Traditional 3D texture based volume rendering algorithms are usually not capable of producing high quality images compared with ray casting algorithms.In order to enhance rendered image quality，during GPU-based 3D texture volume rendering the volume shadow effect is realized by the interactive speed.At the same time，volume graphics are used for realistic image synthesis.Aspects of visual perception are taken into account by means of GPU-based real-time high dynamic range tone mapping．Several examples are given to illustrate the effectiveness on real volume datasets and get better result.

Key words: 3D texture, Graphics Processing Unit（GPU）, volume shadow, tone mapping

摘要： 与光线投射法相比，传统的3D纹理体绘制算法通常难以产生高质量的图像。为了增强渲染图像的真实感与质量，在基于GPU（Graphics Processing Unit）的三维纹理体绘制过程中以交互的速率实现了体阴影效果，并考虑现实图像合成中的可视化感知，提出将基于GPU的高动态范围色调映射技术应用到体绘制得到的结果图片中。最后对一些体数据集进行绘制，实验表明这些技术较好地解决了传统纹理绘制方法的缺点，提高了图像的质量。

关键词: 三维纹理, 图形处理器, 体阴影, 色调映射