复杂背景下激光等离子体光斑中心亚像素提取方法  

Subpixel extraction method for laser plasma spot center image in complex background

作　　者：韦运玲 田小东 唐小玲 WEI Yunling;TIAN Xiaodong;TANG Xiaoling(College of Electronic Information and Computer Engineering,Sichuan Institute of Industrial Technology,Deyang Sichuan 618000,China)

机构地区：[1]四川工业科技学院电子信息与计算机工程学院,四川德阳618000

出　　处：《激光杂志》2024年第9期203-207,共5页Laser Journal

摘　　要：激光等离子体光斑中心提取由于图像降噪效果不佳,导致复杂背景下的中心提取不准确,因此,设计一种新的复杂背景下激光等离子体光斑中心亚像素提取方法。该方法采用多图平均法和高斯滤波算法,将两者结合,降噪处理激光等离子体光斑图像,完整图像预处理。引入Zernike矩法,提取激光等离子体光斑中心,采用圆拟合方法优化该算法,实现光斑图像中心亚像素提取。实验结果表明,所提方法在复杂背景下提取激光等离子体光斑中心亚像素时,提取的光斑中心图像更加清晰,并且信噪比达到了47.0 dB以上,提取的中心位置的绝对误差仅为1 mm,说明该方法提取准确性较高,图像质量更好。Laser plasma spot center extraction due to the poor effect of image noise reduction,the center extraction under complex background is inaccurate,so a new subpixel extraction method of laser plasma spot center under complex background is designed.In this method,the multi-graph average method and Gaussian filter algorithm are combined to process the laser plasma spot image with noise reduction and complete image pre-processing.Zernike moment method is introduced to extract the laser plasma spot center,and the circle fitting method is adopted to optimize the algorithm to achieve the subpixel extraction of the spot image center.The experimental results show that when the proposed method is used to extract the laser plasma spot center subpixel under complex background,the image of the spot center extracted by the proposed method is more clear,and the signal-to-noise ratio reaches more than 47.0dB,and the absolute error of the extracted center position is only 1mm,this method has high extraction accuracy and better image quality.

关 键 词：激光等离子体 光斑图像 亚像素 高斯滤波 多图平均法 ZERNIKE矩 圆拟合方法 

分 类 号：TN911[电子电信—通信与信息系统]