Research Of The Vehicle License Plate Automatic Recongnition

This paper discuss on the topic of my research in Vehicle-License-plate automatic recognizing technologies, it is mainly about the application of Image Processing technologies and Pattern Recognition technologies which applied in LPR. A typical LPR system will include image collecting part, plate location and result processing part, character segmentation part, character recognition part and result processing part etc. This paper is mainly about three parts that of: the first part that Vehicle-License-Plate automatic location and segmentation, the second part that License-Plate-Image processing and character images segmentation, and the last part that License-Characters recognition.This text is mainly including the following parts:1) We cluster the color of the whole vehicle image into eight colors and draw two-dimension histogram of the vehicle license grounding.2) We fix the location and segment the vehicle license automatically based on the idea of two-dimension histogram.3) We pre-process the image of the vehicle license. ( including filtering based on math morphologic, skew correction, threshold and edge measure)4) We utilize two-dimension histogram to segment the character of the license.5) We recognize the character based on the features picked out by BP nerve-network.