针对类球形对象的改进光线投射算法
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摘要
为提高光线投射算法的绘制速度和图像绘制质量,提出了一种针对类球形对象的改进光线投射算法。该算法首先设置球形包围盒的方法剔除对最后绘图结果没有影响的光线投射,用快速求交的方法来提高获取采样点的速度,通过自适应采样的方法加入新的采样点来提高绘制图像的质量。实验结果表明该算法不仅比传统方法绘制出的图像质量清晰,并且提高了算法的执行速度。
To improve the rendering speed and ray casting algorithm and the quality of rendering image,an improved ray-casting algorithm for spherical objects is proposed.The algorithm first removes the light that do not affect the final results by setting spherical bounding box,and then increase the speed of getting sampling points by rapid intersecting method,and finally add new sampling points to improve rendering image quality by adaptive sampling method.The experiment shows that the algorithm is not only make the quality of rendering image more clarity than traditional method,but also improves the algorithm execution speed.
To improve the rendering speed and ray casting algorithm and the quality of rendering image,an improved ray-casting algorithm for spherical objects is proposed.The algorithm first removes the light that do not affect the final results by setting spherical bounding box,and then increase the speed of getting sampling points by rapid intersecting method,and finally add new sampling points to improve rendering image quality by adaptive sampling method.The experiment shows that the algorithm is not only make the quality of rendering image more clarity than traditional method,but also improves the algorithm execution speed.
引文
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[9]ZHAO Liping,XIAO Degui,LI Kenli,et al.An efficient in al-gorithm for large scale volume data compression and its applica-tion in seismic data processing[J].Journal of Computer AidedDesign&Computer Graphics,2009,21(11):1606-1611(inChinese).[赵利平,肖德贵,李肯立,等.一种高效体数据压缩算法及其在地震数据处理中的应用[J].计算机辅助设计与图形学学报,2009,21(11):1606-1611.]
[10]LUO Yuetong,XUE Ye,LIU Xiaoping.GPU based multi-resolution volume data reconstruction and rendering[J].Journal of Computer-Aided Design&Computer Graphics,2009,21(1):107-111(in Chinese).[罗月童,薛哗,刘晓平.基于GPU的多分辨率体数据重构和渲染[J].计算机辅助设计与图形学学报,2009,21(1):107-111.]
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