License plate tracking recognition method based on event triggering

The invention discloses a license plate tracking recognition method based on event triggering. The method comprises the following steps of performing vehicle detection and license plate extraction ona trigger frame at the trigger moment to obtain vehicle coordinates or a license plate area, and performing target vehicle judgment; and starting video stream tracking under the condition that whetherthe license plate quality evaluation of the target vehicle exceeds a specified threshold, performing license plate region judgment on a target vehicle region in the tracked video stream, and finallyobtaining a finally identified license plate through identification voting. According to the invention, bidirectional simultaneous frame-by-frame decoding and vehicle license plate tracking identification are carried out by taking the trigger frame as a reference in the video stream, so that the length of the intercepted video stream is effectively reduced and the tracking identification efficiency is improved; according to