Backlight interference resistance identification method for lightning arrester leakage ampere meter

The invention relates to a lightning arrester leakage ampere meter anti-backlight identification method based on gradient direction characteristics, and the method comprises the following steps: collecting an original image of a lightning arrester leakage ampere meter, and carrying out the preprocessing of the original image, and obtaining an enhanced image; obtaining a direction gradient histogram of pixels in the enhanced image, and processing to obtain gradient direction features of the whole enhanced image; the gradient direction features of the lightning arrester leakage ammeter enhanced image are obtained through the above steps as samples, and the readings of the ammeter are added to the samples as sample labels; the gradient direction features of all the samples serve as input, the sample labels serve as output, an SVM classifier is trained, and a trained reading recognition model is obtained; obtaining an original image of a leakage ammeter of a target lightning arrester, and obtaining gradient direc