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光线投射算法因其算法成熟、成像质量高而被广泛应用于体绘制技术中.为解决高质量图像带来的计算量大、绘制时间长等问题,该文在传统光线投射算法的基础上,针对体绘制过程中重采样点插值、合成耗时长问题进行研究,提出一种改进的自适应复合插值光线投射算法.依据设置的阈值范围,调整后退采样步长大小进行插值采样点以及插值算法的选取,优化重采样及插值过程.实验结果表明,在保证所需图像质量下,此文改进方法与传统体绘制算法相比速度获得显著提升.“,”The ray casting algorithm is widely used in volume rendering technology due to its mature algorithm and high imaging quality.To solve the problems of large amount of calculation and long rendering time caused by high-quality images,the problems of re-sampling point interpolation and time-consuming synthesis in the volume rendering process based on the traditional ray casting algorithm are studied,and an improved adaptive compound interpolation ray casting algorithm is proposed.According to the set threshold range,the size of the retreating sampling step is adjusted to select the interpolation sampling point and interpolation algorithm,and the re-sampling and interpolation process are optimized.The experimental results show that the speed of the improved method is significantly improved compared with the traditional volume rendering algorithm under the guarantee of the required image quality.