An Improved Method of Vehicle License Plate Localization

Aiming at the disadvantages of most license plate localization methods which are short of illumination adaptability and discriminate plate color, an improved method was put forward.Adopt multi-layer searching arithmetic which integrates texture with color,and using a floating threshold.Test 2450 frame pictures take from freeway crossing,the localization rate is about 99%,running time less than 0.15 s/frame under Matlab with P4 1.8G CPU/512MB.This improved method improves the localization rate and flexibility,and its operation speed meet real time requires.