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 com-plex background is designed.In this method,the multi-graph average method and Gaussian filter algorithm are com-bined 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 al-gorithm to achieve the subpixel extraction of the spot image center.The experimental results show that when the pro-posed 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 im-age quality.
laser plasmaspot imagesubpixelgaussian filtermulti-graph average methodZernike momentcircle fitting method
维普
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