Character confidence based on N-best list for keyword spotting in online Chinese handwritten documents
文献类型：期刊论文
| 作者 | Zhang, Heng ; Wang, Da-Han; Liu, Cheng-Lin
|
| 刊名 | PATTERN RECOGNITION
 |
| 出版日期 | 2014-05-01 |
| 卷号 | 47期号:5页码:1880-1890 |
| 关键词 | Online Chinese handwritten documents Keyword spotting Posterior probability N-best list Confidence measure Confusion network |
| 英文摘要 | In keyword spotting from handwritten documents by text query, the word similarity is usually computed by combining character similarities, which are desired to approximate the logarithm of the character probabilities. In this paper, we propose to directly estimate the posterior probability (also called confidence) of candidate characters based on the N-best paths from the candidate segmentation-recognition lattice. On evaluating the candidate segmentation-recognition paths by combining multiple contexts, the scores of the N-best paths are transformed to posterior probabilities using soft-max. The parameter of soft-max (confidence parameter) is estimated from the character confusion network, which is constructed by aligning different paths using a string matching algorithm. The posterior probability of a candidate character is the summation of the probabilities of the paths that pass through the candidate character. We compare the proposed posterior probability estimation method with some reference methods including the word confidence measure and the text line recognition method. Experimental results of keyword spotting on a large database CASIA-OLHWDB of unconstrained online Chinese handwriting demonstrate the effectiveness of the proposed method. (C) 2013 Elsevier Ltd. All rights reserved. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Computer Science, Artificial Intelligence ; Engineering, Electrical & Electronic |
| 研究领域[WOS] | Computer Science ; Engineering |
| 关键词[WOS] | CONTINUOUS SPEECH RECOGNITION ; NETWORKS ; SEGMENTATION ; CONSENSUS ; STRATEGY |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000331667400009 |
| 源URL | [http://ir.ia.ac.cn/handle/173211/3084]  |
| 专题 | 自动化研究所_模式识别国家重点实验室_模式分析与学习团队 |
| 作者单位 | Chinese Acad Sci, Inst Automat, NLPR, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Heng,Wang, Da-Han,Liu, Cheng-Lin. Character confidence based on N-best list for keyword spotting in online Chinese handwritten documents[J]. PATTERN RECOGNITION,2014,47(5):1880-1890. |
| APA | Zhang, Heng,Wang, Da-Han,&Liu, Cheng-Lin.(2014).Character confidence based on N-best list for keyword spotting in online Chinese handwritten documents.PATTERN RECOGNITION,47(5),1880-1890. |
| MLA | Zhang, Heng,et al."Character confidence based on N-best list for keyword spotting in online Chinese handwritten documents".PATTERN RECOGNITION 47.5(2014):1880-1890. |
入库方式： OAI收割
来源：自动化研究所
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