A novel approach to license plate locating and identifying based on the Curved Field Space is proposed in this paper.Firstly

by detecting the brightness information in the color vehicle image

the gradual gradient vectors are fitted

and then the dot matrix depiction with curved quantum is used to describe the gradual gradient vectors and the color information is eliminated.Then

the sampling curved quantum groups are merged into sub-curved spaces which include car's body

plate and chars.The sub-curved spaces of plate and chars which are formed of curved quantum groups constitute the curved field space by linking up with each edge curved quantum smoothly.Finally

recognition results are obtained by depth and dimension both of which are extracted from Curved Field Space.Experiments show that the proposed approach has overcame the problem of feature rotating

varied angle

wear and fuzzy chars

and achieves good locating and identifying results.