Oracle Character Recognition by Nearest Neighbor Classification with Deep Metric Learning
Zhang, Yikang1,2; Zhang, Heng1; Liu, Yongge4,5; Yang, Qing1; Liu, Chenglin1,2,3
2019-09-20
会议名称The 15th IAPR International Conference on Document Analysis and Recognition (ICDAR 2019)
会议日期20-25 Sep. 2019
会议地点International Convention Centre (ICC) Sydney
摘要

    Oracle character is one kind of the earliest hieroglyphics, which can be dated back to Shang Dynasty in China. Oracle character recognition is important for modern archaeology, ancient text understanding, and historical chronology, etc. To overcome the limitation and class imbalance of training data in oracle character recognition, we propose a classification method based on deep metric learning. We use a convolutional neural network (CNN) to map character images to an Euclidean space where the distance between different samples can measure their similarities such that classification can be performed by the Nearest Neighbor (NN) rule. Because new categories are still being discovered in reality, our model enables the rejection of unseen categories and the configuration of new categories. To accelerate NN classification, we also propose a prototype pruning method with little loss of accuracy. The proposed method exceeds the state of the art on the public dataset Oracle-20K and outperforms CNN with softmax layer on a new dataset Oracle-AYNU.

关键词Oracle Character Recognition Dense Convolutional Network Deep Metric Learning Nearest-neighbor Classifier
学科门类工学
收录类别EI
资助项目Beijing Science and Technology Project[Z181100008918010] ; National Natural Science Foundation of China[61721004] ; National Natural Science Foundation of China[61721004] ; Beijing Science and Technology Project[Z181100008918010]
语种英语
七大方向——子方向分类文字识别与文档分析
文献类型会议论文
条目标识符http://ir.ia.ac.cn/handle/173211/28356
专题模式识别国家重点实验室_模式分析与学习
通讯作者Zhang, Yikang
作者单位1.National Laboratory of Pattern Recognition, Institute of Automation, Chinese Academy of Sciences
2.School of Artificial Intelligence, University of Chinese Academy of Sciences
3.CAS Center for Excellence of Brain Science and Intelligence Technology
4.School of Computer & Information Engineering, Anyang Normal University
5.Key Laboratory of Oracle Bone Inscriptions Information Processing, Ministry of Education
第一作者单位模式识别国家重点实验室
通讯作者单位模式识别国家重点实验室
推荐引用方式
GB/T 7714
Zhang, Yikang,Zhang, Heng,Liu, Yongge,et al. Oracle Character Recognition by Nearest Neighbor Classification with Deep Metric Learning[C],2019.
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