关键词: 车牌定位, 倾斜校正, 特征匹配, 仿射模型

Abstract: In order to robustly locate vehicle license plate and correct tilt under different conditions, a novel approach for license plate location and tilt correction was proposed based on the feature matching of character. Considering that the primacy characteristic of the PRC license plates was Chinese characters, this approach got the Chinese character's position using standard Chinese characters of the PRC license plates based on feature matching. The Chinese character's position in the PRC license plates was fixed, thus, the proposed approach achieved license plate location and tilt correction using Chinese characters location. To demonstrate the effectiveness of the proposed approach, it conducted extensive experiments over a large number of real-world vehicle license plates. It reports that the proposed approach has high accuracy and robustness.

Key words: license plate location, tilt correction, feature matching, affine model