基于图像的弹道导弹垂直起飞段弹道分析

Analysis of the Ballistic Trajectory of the Ballistic Missile at the Vertical-Flying-Off Stage Based on Images

为了解析弹道导弹垂直起飞段的运动轨迹,对测量方法进行了研究.在热像仪静止,弹道导弹起飞条件下,获取红外序列图像.利用SUSAN滤波算法滤除噪声,利用迭代法求得阈值,将其作为灰度窗口变换下限,进行图像分割后,求得目标质心.通过比较序列图像中不同帧间质心位置的改变,根据比例映射,求得目标在不同时刻的飞行高度.在VC++6.0和Mat-lab6.5平台下,根据建立的弹道模型,利用非线性回归方法和矩阵理论,求得弹道模型参数.此方法可实现非接触测量,全场测量,而且精度高,自动化程度高.

Method for analysing the ballistic trajectory of the ballistic missile at the vertical-flying-off stage is presented. The serial infrared images are obtained on condition that thermal imaging system is static and the ballistic missile is taking off. Image noise is removed by SUSAN filtering and the gray threshold value which is regarded as the lower limit of the windowing transformation of gray is confirmed using iterative method in order to segment image and to obtain the coordinates of the target centroid. The flying height of the target at any moment can be acquired by proportion mapping according to the positional alteration of the centroid frame to frame in the serial infrared irnages. The parameters ters of the ballistic model are done on the basis of the math model built, by the norvlinear regression method and ma- trix theory, using VC＋＋ 6. 0 and Matlab 6. 5. This measurernent method which is in the complete visual field is untouched, and its measuring accuracy is high, so is its automaticity.