Accurate evidence obtaining method for long-distance illegal parking of expressway emergency lane

The invention provides an accurate evidence obtaining method for long-distance illegal parking of an expressway emergency lane, which can realize accurate evidence obtaining of vehicles which are parked illegally in a long distance by utilizing existing equipment, and is low in cost, short in time consumption and high in practicability. The usability of an image which is shot by a dome camera and is used for extracting a feature vector is ensured through quality judgment operation, the difficulty of verification feature value extraction is reduced, the overall calculation speed is increased, and the accuracy of a final calculation result is improved; identifying the illegal parking behavior of the long-distance emergency lane through a gunlock, and analyzing the ReID characteristics of the vehicle; the method comprises the following steps: firstly, carrying out camera shooting on the vehicle, then linking a ball machine to close, analyzing the ReID characteristics of the vehicle in a picture, and meanwhile, c