关键词: 车牌识别, 车牌定位, 数学形态学, 几何拓扑学

Abstract: Vehicle license plate locating is one of the key technologies for automatic License Plate Recognition(LPR),and has a great impact on character segmentation and character recognition.In this paper,morphology and topology are used in plate location.Image preprocessing is first adopted,which is implemented by Top-Hat transform,opening and closing operations.Connected components analysis is then performed to detect candidate regions.At last,the real license plate area is obtained according to the Euler number of candidate regions.Experiments show that it can realize the fast search and location of the corner angles of the license plate and segment the license plate from the complex image.

Key words: license plate recognition, license plate location, morphology, topology