箭载图像中目标测距方法研究

摘要

研究箭载图像中的目标测距方法,可作为遥测的一条新途径.首先,使用STK软件仿真运载火箭级间分离过程,输出箭载视角仿真图像.然后,应用阈值分割方法突出目标,基于针孔成像模型解算出一、二级箭体的分离距离,并将其与仿真输入的实际距离作比对,验证方法的测量误差.实验结果表明,方法可在不改变现有图像测量系统结构的前提下深入挖掘图像信息,测量结果精度较好,为后续进一步开发基于箭载图像的物理量测量打下了基础.%This paper carries research on distance measurement method using rocket image, it is regarded as a new approach of telemetering. Firstly, STK software is used to simulate launch vehicle's stage separation process and output simulated images in launch vehicle's view. Afterwards, the simulated images are segmented to highlight the target, then the relative distances between two stages are calculated based on pinhole imaging model. The measured distances are compared with real distances, and then the measurement errors are obtained. The result indicates that the method has satisfactory accuracy and doesn't change the structure of the image measurement system. The method will strongly support further development of physical parameters measurement based on rocket images.