Photovoltaic cell defect detection method and device based on image processing and medium

The invention relates to a photovoltaic cell defect detection method and device based on image processing and a medium. The method comprises: acquiring an original image; carrying out gray scale transformation on the original image to obtain a preprocessed image; based on a preset transverse filtering algorithm, obtaining a first image according to the preprocessed image; obtaining a second image according to the preprocessed image based on a preset longitudinal filtering algorithm; the preset transverse filtering algorithm and the longitudinal filtering algorithm are used for eliminating pixels of a smooth part of the image and highlighting a defect part; according to the preprocessed image, the first image and the second image, based on a defect algorithm, obtaining a subfissure defect area; the defect algorithm is used for accurately positioning a defect area. The method is used for solving the problem that in the prior art, interference information in a to-be-detected image is not processed, a detection a