关键词: 尺度旋转不变特征描述算子（SIFT）特征匹配, 车牌识别, 智能交通系统

Abstract: In view of the numerous methods to recognize license plate in image, most use optical character recognition based method. And confounding factors such complex scene, occlusion and background clutter, make license plate recognition in the real scene be far away from matured. To this end, a SIFT matching based method for license plate recognition is proposed in this paper. The interpolation based super-resolution method is used as preprocessing for image reconstruction. And a license plate segmentation method is proposed by using shape feature. Finally, SIFT matching method is used for license plate recognition. Experimental results show that the proposed method locates and recognizes license plate in image accurately.

Key words: Scale Invariant Feature Transform（SIFT） feature matching, license plate recognition, intelligent transportation system