摘要
基于Stellarium开源天文软件获取的星空背景图像数据,在其上随机添加不同运动方向的小目标,并在不同的帧图像对小目标进行随机方向和大小的位移,模拟空间目标的形态特征和运动特征;在对序列帧图像进行预处理、去除噪声、图像分割、质心确定、图像配准、最大值投影等一系列操作后,生成包含运动目标轨迹和恒星背景目标的图像;之后使用Radon变换对空间目标的运动方向进行检测。实验结果表明,该处理方法和流程不仅能够对单个目标进行运动方向检测,而且能够检测多个运动目标的运动方向,计算得到的空间目标运动方向和实际设置运动方向的绝对误差精度均值为0.022 2°,支持对圆弧状运动轨迹进行分析,并对噪声有一定的抗干扰能力,能够有效地对空间目标运动方向进行精确、准确检测。
From stellar background images obtained by using the Stellarium astronomy software,small targets with different motion directions are selected randomly. The small targets are randomly assigned,shifted in random directions,and modified in size within the different frame images to simulate the morphological and motion characteristics of the space targets in the stellar background,and the sequence frame image is pre-processed to remove noise. After a series of operations,viz. image segmentation,mass determination,image registration,and maximum projection,an image containing the motion target trajectory and the space target is generated. Subsequently,the motion direction of the space target is detected using the Radon transformation. The experimental results show that the absolute error of both the calculated direction and the actual direction of motion is 0. 0222°. Therefore,the process can be used to effectively detect the motion direction of the space target.
作者
曹城华
武文波
王钰
CAO Cheng-hua;WU Wen-bo;WANG Yu(Beijing Institute of Space Mechanics&Electricity,Beijing 100094,China)
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2021年第7期1678-1685,共8页
Optics and Precision Engineering
关键词
RADON变换
星空背景
空间目标
运动方向检测
Radon transformation
starry background
space target
movement direction detection
