The invention discloses a video
stream-based
license plate recognition method, comprising the following steps: S1, detecting triggering, namely defining a rectangular
region of interest, obtaining a
binary image in the rectangular
region of interest by a
frame difference, and judging whether a vehicle passes through the region according to the result of the
binary image; S2,
license plate location, namely carrying out
license plate detection in the detection region in the image, and
cutting a detected license plate out to obtain a license plate image; S3, license plate pretreatment, namely carrying out license plate inclination correction and accurate license plate
cutting on the license plate image; S4, license plate character
cutting, namely cutting the character on the license plate image, and decomposing the character into a
single character image; S5, license plate
character recognition; S6, repeating operations from the steps S2 to S5 on each frame of image to obtain a plurality of license plate recognition results; and S7, result voting. By the video
stream-based license plate recognition method, license plate recognition is carried out on the basis of a plurality of frames of images. Thus, the risk caused by a recognition error of a
single image is greatly reduced, and the overall recognition rate of the license plate is improved.