自适应红外隐身系统的背景投影误差分析

Background Projection Error Analysis in the Adaptive Infrared Stealth System

通过观察点、目标以及背景之间的透视投影关系,建立了目标与遮挡背景之间的空间对应模型,得到了模型中的视点坐标和距离参数的背景投影误差方程,并利用蒙特卡罗统计方法对旋转角度参数进行误差分析.实验结果表明:各参数误差与像素偏差之间呈线性关系,在不同初始条件下,视点坐标和距离参数的误差对像素偏差的影响是不同的;由视点X、Y坐标误差引起的像素偏差远大于视点Z坐标或距离参数的误差,俯仰角与偏航角误差引起的像素偏差远大于由滚动角引起的偏差.

The model between the object and the occlusion background was established by the relationship of perspective projection between the viewpoint,object and background.The error equation was obtained for the coordinates of the viewpoint and the distance to background.The errors of the angle of rotation were analyzed based on the Mont Carlo method.The results show that the relationship between the pixel offset and the errors of parameters is linear,the viewpoint coordinates and the distance errors have different influence in different initial conditions.The pixel offset which is caused by Xcoordinate and Y coordinate of viewpoint is much higher than the offset which is caused by Zcoordinate or the distance to object.The pixel offset which is caused by the pitch angle and the yaw angle is much higher than the offset which is caused by the rolling angle.