https://scholars.lib.ntu.edu.tw/handle/123456789/24144
標題: | OCR雜訊文件之檢索 An Approach to Retrieval of OCR Degraded Text |
作者: | 曾元顯 Tseng, Yuen-Hsien |
關鍵字: | Optical Character Recognition;Information Retrieval;Fault-tolerant Retrieval;Keyword Extraction;Fuzzy Matching | 公開日期: | 十二月-1998 | 出版社: | 國立臺灣大學圖書資訊學系 Department of Library and Information Science, National Taiwan University |
期: | n.13 pp.153-168 | 起(迄)頁: | - | 來源出版物: | 圖書館學刊 | 摘要: | The major problem with retrieval of OCR text is the unpredictable distortion of characters due to recognition errors. Because users have no ideas of such distortion, the terms they query can hardly match the terms stored in the OCR text exactly. Thus retrieval effectiveness is significantly reduced , especially for low-quality input. To reduce the losses from retrieving such noisy OCR text, a fault-tolerant retrieval strategy based on automatic keyword extraction and fuzzy matching is proposed. In this strategy, terms, correct or not, and their term frequencies are extracted from the noisy text and presented for browsing and selection in response to users' initial queries , With the understanding of the real terms stored in the noisy text and of their estimated frequency distributions, users may then choose appropriate terms for a more effective searching, A text retrieval system based on this strategy has been built. Examples to show the effectiveness are demonstrated. Finally, some OCR issues for further enhancing retrieval effectiveness are discussed. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/190595 | DOI: | doi: 10.6182/jls.1998.13.153 |
顯示於: | 圖書資訊學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。