License plate localization and identification method based on high-definition image

The invention discloses a license plate localization and identification method based on a high-definition image, comprising the following steps of: (1) carrying out one-time downsampling on the original color images, graying the downsampled images and carrying out vertical edge detection and binaryzation on the images, and carrying out license plate rough localization by utilizing vertical edge information to obtain all candidate license plate areas; (2) mapping all the candidate license plate areas into the original images and sending to a trained cascade Adaboost grader so as to remove non-license plate areas; (3) carrying tilt correction on the license plate areas obtained in the step (2); (4) carrying out character segmentation on the license plate areas obtained in the step (3); and (5) identifying segmented characters. The invention can rapidly and effectively extract a plurality of license plates in different sizes from a complicated scene and can effectively improve the character identification accuracy. The license plate localization and identification method has wide application prospect in the aspects of intelligent transportation, parking lot management, residential quarter management, and the like.