应用于人卫激光测距光尖图像处理方法研究

Research on laser-tip image processing method for satellite laser ranging

介绍了一种基于人卫激光测距望远镜寻找激光光尖的新型检测方法和实施效果。通过实拍的激光光尖图像,采用高斯滤波等方法对图像进行预处理,再对降噪滤波后的图像提取边缘,输出二值图像,利用霍夫直线变换,对在CCD靶面成像的激光位置进行标定。基本达到了在肉眼识别不清的情况下检测出激光光尖,并精确计算出光尖的坐标。通过质心算法计算出的卫星星点质心坐标,可以确定光尖与星点质心的偏差量,从而控制望远镜的转动消除偏差,达到无人值守的科研目标。

A new method about the telescope for satellite laser range(SLR)is proposed,which is to find the laser-tip in a special way.Firstly,the method of Gauss filter and some other ways are adopted to preprocess the picture received in the experiment.Secondly,the edge of the images after noise reduction filtering is extracted,and binary images are exported.Thirdly,Hough Linear Transform is used to find the laser-tip position on CCD camera image surface.With this method,the laser tip can be detected when eyes can′t recognize it clearly.What′s more,the coordinate of laser-tip can be calculated accurately.The center-of-mass coordinate of satellite worked out by means of centroiding algorithm can determine deviation between laser-tip and center-of-mass centroiding,so as to control the rotation of the telescope to eliminate the offset and achieve the scientific research goal of unsupervised.