摘要
在面向多用户的大规模地震体远程可视化中,针对传统任务调度策略会导致大量I/O操作和体纹理重复计算的问题,设计了基于视点相关的体绘制任务重排算法,改进了批量并行绘制任务调度策略,并进一步实现了基于并行保护锁的LRU缓冲区更新策略。为解决地震体可视化图像的传输效率与显示质量的矛盾,满足用户优先观察感兴趣区域的需求,设计了基于感兴趣区域优先编码的地震体图像渐进式传输方法。实验表明,该方法使纹理体块缓冲区命中率提升了6.2%,平均绘制时间减少了14%,低网速场景下传输44.5%的图像数据即可清晰展示地震体可视化结果。
During the remote visualization of large-scale seismic volume for multi-user concurrent interaction, traditional task scheduling approaches could lead to large amount of I/O operation and repetitive calculation of volume texture blocks. So, a more efficient multi-task scheduling strategy was proposed, which rearranged the schedule order of volume rendering tasks through computing their viewpoint correlation. Furthermore, an optimized design of LRU based on parallel protection lock was made. In order to improve the network transmission efficiency and quality of seismic visualization image simultaneously, and to meet the requirement of users to observe the region of interest（ROI） preferentially, the progressive transmission technique with ROI-first was developed. Experimental results show that the proposed methods can improve the hit rate of texture block buffer by 6.2%, reduce the average rendering time by 14%, and clearly show the visual results of seismic volume through only transmitting 44.5% of whole image data in the low-speed network.
作者
纪连恩
赵妮
梁适宜
黄博
Ji Lianen;Zhao Ni;Liang Shiyi;Huang BO(College of Geophysics and Information Engineering, China University of Petroleum, Beijing 102249, China;Beijing Key Laboratory of Petroleum Data Mining, Beijing 102249, China)
出处
《系统仿真学报》
CAS
CSCD
北大核心
2018年第7期2540-2549,共10页
Journal of System Simulation
基金
国家自然科学基金(60873093)
关键词
大规模地震体
远程可视化
多视点
多任务调度
large-scale seismic volume
remote visualization
multi-viewpoint
multi-task scheduling
