实时舰船红外热像仿真平台的加速算法

Optimized algorithms used in realtime infrared simulator of marine ship

在舰船红外热像仿真研究中,仿真的实时性和仿真结果的精度一直是制约热像仿真成果得到工程应用的主要因素.介绍了船舶系统工程部针对舰船红外抑制和红外对抗的需要开发 RIS(Real-time InfraredSimulator,实时海面舰船红外热像仿真平台)所采用的加速算法,包括提高三维图像精度的"多层投影算法"和提高可视性判断速度的"z 缓冲区采样算法".在普通 PC 机上的验证结果表明,RIS 仿真计算所需的时间仅约30s,图像刷新所需时间小于0.05 s.提高计算机硬件配置后,RIS 的仿真速度还将有大幅度的提高.

The study on infrared signature simulation of marine ship has always been limited in engineering practice because of the deficiency of validity and the time-consuming simulation program.Several optimized algorithms are introduced in this paper,which has been used in Real-time Infrared Simulator (RIS) developed by Ship System Engineering Research Institute for the study of Infrared Signature Suppression (IRSS) and Infrared Counter-Measure (IRCM).These optimized algorithms include'multi-layer projection algorithm'to enhance the precision of 3D image and'z-buffer sample algorithm'to reduce the computation time consumed by the judgments of visual ability of ship surface.Running on common PC plat,the computation time consumed by RIS to simulate the infrared signature is less than 30 s,and the refreshing period of RIS is less than 0.05 s.The speed of RIS will greatly increase on high capability computers.