大气激光通信载波光信号接收过程中光斑检测技术研究

Research on Spot Detection Technology in the Process of Receiving Carrier Optical Signal of Atmospheric Laser Communication

大气激光通信载波光信号在接收信息时,信息中存在大量光斑噪声,降低了激光通信质量。为此,提出大气激光通信载波光信号接收过程中的光斑检测技术。通过去噪处理获取光信号转换图像中的光斑,结合Retinex原理增强光斑图像;使用阈值分割方法提取光斑形状,并借助几何纠正方法修正光斑形状;利用Hough变换算法将光斑图像从空间域变换至参数空间中,通过光斑的极值点检测确定光斑曲线参数,计算激光光斑变形值,实现激光的光斑检测。实验结果表明,使用该方法检测激光光斑时,检测时间短、检测效果好。

When the carrier optical signal of atmospheric laser communication receives information,there is a lot of spot noise in the information,which reduces the quality of laser communication.Therefore,the spot detection technology in the process of receiving carrier optical signal in atmospheric laser communication is proposed.The light spot in the optical signal conversion image is obtained by denoising,and the light spot image is enhanced by combining Retinex principle.The method of threshold segmentation is used to extract the shape of the facula,and the geometric correction method is used to correct the shape of the facula.The Hough transform algorithm is used to transform the spot image from the space domain to the parameter space.The parameters of the spot curve are determined through the detection of the extreme points of the spot,and the deformation value of the laser spot is calculated to realize the laser spot detection.The experimental results show that the detection time is short and the detection effect is good when the proposed method is used to detect laser spot.