Character Segmentation for License Plate by the Separator Symbols Frame of Reference
Character segmentation is the middle stage of the license plate recognition algorithm. The precision of the character segmentation is blocked by two factors. One is the character area always have errors for the reason of license plate location algorithm, which made the real margin of the license plate define impossible. The other is that the characters themselves are illegible, or the strokes are broken or conjoint, namely the image is degraded. So characters borders are also very difficult to obtain. To solve these problems, a character segmentation method bases on the separator symbols frame of reference is proposed in this paper. At first, figuring out the separator symbols region by using the uniqueness of projection feature of separator symbols region, then constructing the characters borders of pre segmentation based on the separator symbols region combines some prior knowledge of license plate format. After analyzing the projection feature on character area, each character can be segmented accurately. Experiment results show that this method can segment license plate characters precisely and robustly.
license plate recognition character segmentation separator symbol
Hongwei Ying Jiatao Song Xiaobo Ren
College of Electronic and Information Engineering Ningbo University of Technology Ningbo,China
国际会议
昆明
英文
438-442
2010-10-17（万方平台首次上网日期，不代表论文的发表时间）