视觉传达技术下星载激光光斑质心精准定位方法
A precise positioning method for the centroid of spaceborne laser spot under visual communication technology
刘燕 1董雪慧 1邹宇2
作者信息
- 1. 河南工学院,河南 新乡 453003
- 2. 南京信息工程大学人工智能学院未来技术学院,南京 210044
- 折叠
摘要
星载激光光斑质心的精准定位可以提高光学系统的性能和测量精度,为了提高其定位精度,提出视觉传达技术下星载激光光斑质心精准定位方法.首先,采用视觉传达技术中基于漫反射的CCD摄像机实时采集星载激光光斑图像;其次,利用光斑互相关系数计算方法,对采集到的光斑图像展开相似度评估,以初步确定光斑的位置和形状;最后,选择改进高斯拟合亚像素定位算法,对初步定位结果作精细化处理,进而提高定位精度,获得更精准的光斑质心位置.实验结果表明,所提方法在x轴和y轴方向上的质心定位偏差参数均在0.4 像素以内,多帧光斑图像质心定位坐标较为集中,说明该方法具有较高的精度和稳定性.
Abstract
The precise positioning of the centroid of spaceborne laser spots can improve the performance and meas-urement accuracy of optical systems.In order to improve its positioning accuracy,a precise positioning method for the centroid of spaceborne laser spots under visual communication technology is proposed.Firstly,a CCD camera based on diffuse reflection in visual communication technology is used to capture real-time satellite laser spot images;Secondly,using the method of calculating the cross-correlation coefficient of light spots,the similarity evaluation of the collected light spot images is carried out to preliminarily determine the position and shape of the light spot;Finally,the im-proved Gaussian fitting sub-pixel positioning algorithm is chosen to refine the preliminary positioning results,thereby improving positioning accuracy and obtaining more accurate spot centroid positions.The experimental results show that the proposed method has a centroid positioning deviation parameter within 0.4 pixels in both the x-axis and y-axis di-rections,and the centroid positioning coordinates in multi frame spot images are relatively concentrated,indicating that the method has high accuracy and stability.
关键词
视觉传达技术/CCD摄像机/互相关系数计算/高斯拟合亚像素定位Key words
visual communication technology/CCD camera/calculation of mutual relationship numbers/gaussian fitting sub-pixel localization引用本文复制引用
出版年
2024
NETL
NSTL
万方数据