基于流动图与时间上升频的实时云层移动研究  

Research on Real-time Cloud Movement Based on Flow-map and Temporal Upsampling

作　　者：陈烨 李顺新[1,2,3] CHEN Ye;LI Shun-xin(School of Computer Science and Technology,Wuhan University of Science and Technology,Wuhan 430065,China;Hubei Province Key Laboratory of Intelligent Information Processing and Real-time Industrial,Wuhan 430065,China;Institute of Big Data Science and Engineering,Wuhan University of Science and Technology,Wuhan 430065,China)

机构地区：[1]武汉科技大学计算机科学与技术学院,湖北武汉430065 [2]湖北智能信息处理与实时工业系统重点实验室,湖北武汉430065 [3]武汉科技大学大数据科学与工程研究院,湖北武汉430065

出　　处：《计算机技术与发展》2023年第8期37-42,共6页Computer Technology and Development

基　　金：国家自然科学基金联合基金重点支持项目(U1803262)。

摘　　要：现有基于光线步进的云层渲染方法能够较好地得到云层形状,但渲染效率不高且在云层移动时边缘会缺失云层移动形变细节且出现不连续的情况。针对上述问题,提出了一种基于流动图的云层移动渲染算法,算法的核心思想是利用流动图控制云层在移动时竖直方向上的偏移,使云层随风连续形变的同时增加一定前向扭曲效果。其次,为保证渲染的实时性,利用交叉矩阵来降低单帧渲染像素的数量,提高渲染速度。最后,提出使用时间上升频来增强减少渲染像素后的渲染结果。相较于未使用流动图的云层移动算法,所提算法能够在性能增加不超过10%的情况下表现出云层移动时的整体形变以及向风向连续翻滚的效果。Existing ray-marching based cloud rendering method is good at achieving the shape of clouds,but is not efficient and there are discontinuities at the edges when cloud moves.To address the issue above,a flow-map based algorithm is proposed for clouds movement rendering,and its main idea is to use flow-map to control the deflection of moving clouds in the vertical direction,so that the clouds can moving continuously with the wind while adding a certain forward distortion and deformation effect.Secondly,to ensure real-time rendering,the cross matrix is used to reduce the number of pixels rendered in a single frame for raising the rendering speed.Finally,temporal upsampling is introduced for enhancing the rendering results after the reduction of rendering pixels.The proposed algorithm is able to exhibit an overall shape change in cloud movement and a continuous roll towards the wind direction with no more than 10%increase in performance compared to the cloud movement algorithm without the use of flow-map.

关 键 词：实时渲染 云层移动 光线步进 流动图 时间上升频 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]