The Research Of Automatic Vehicle License Plate Recognition System And Implementation In VC++

In this article, some new algorithms and methods are presented in such stages as pre-processing of images, license plate segmentation, character segmentation, character recognition in the license plate recognition system. At the same time, some crucial problems of technology were overall discussed, for example, (1) How to locate and segment license plate rapidly and exactly? (2) How to segment each character image accurately? (3) How to design the high recognition ratio decision? (4) How to design and implement the system?This paper presents an approach called linear probe search to locate and segment license plate, which makes use of the characteristic of the license plate using a linear structure to scan the image and record the marching pixels. About the character segmentation, this article studies the method of based on vertical projection difference analysis, which can reflect the width of apex and paddy. In the recognition of characters module we present an approach of based on characteristic template matching combined with neural network recognition. Finally we specify the design and realization of the license plate recognition system on the plat of VC++6.0.