基于多核处理器的星空背景弥散效果实现算法  

Multi-core based algorithm for generating celestial background confusion effect

作　　者：程小华[1,2] 郑昌文[1] 吴佳泽[1] 

机构地区：[1]中国科学院软件研究所天基综合信息系统重点实验室,北京100190 [2]中国科学院研究生院,北京100190

出　　处：《计算机工程与设计》2013年第1期252-255,共4页Computer Engineering and Design

基　　金：国家973重点基础研究发展计划基金项目(2009CB723906)

摘　　要：针对空间探测系统仿真中生成星空背景图像不能及时响应的弊端,提出一种利用多核加速生成星空背景图像的算法。阐述星空背景图像产生弥散效果的原理,在二维高斯模型的中心衰减函数基础之上对星空背景弥散效果进行建模仿真,并给出了一种基于多核处理器的并行实现方法。通过对不同恒星数目的星空背景进行仿真,分析了基于多核的并行算法相对于基于单核的串行算法的加速比,得出基于多核处理器的星空背景弥散效果实现算法基本能满足实时性要求。Due to the defect that requirement of speed for digital image generation of celestial background can＇t be met in time, a algorithm of celestial background is proposed, which is accelerated by multi--cores processor. First of all, clarify principle of confusion in generating digital image of celestial background is expounded, confusion effect of celestial background based on cen- ter-attenuated function of two-dimension Gauss model is modeled and simulated. Then, confusion effect generation algorithm is proposed based on multi-core processors generating and integrating sub-picture on multi-core processor. On the condition of dif- ferent counts of stars, accelerated-ratio with parallel algorithm based on multi-core processors compared is analyzed by serial al- gorithm based on single core. Ultimately, confusion effect generation algorithm based on multi-core processors is applied to meet requirement of generating images in time in spatial detecting system of stimulation.

关 键 词：多核 弥散 星空背景 成像仿真 加速成像 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]