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From one star to three stars : Upgrading legacy open data using crowdsourcing

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タイトル: From one star to three stars : Upgrading legacy open data using crowdsourcing
著者: Oyama, Satoshi 著作を一覧する
Baba, Yukino 著作を一覧する
Ohmukai, Ikki 著作を一覧する
Dokoshi, Hiroaki 著作を一覧する
Kashima, Hisashi 著作を一覧する
発行日: 2015年
出版者: IEEE (Institute of Electrical and Electronics Engineers)
引用: Data Science and Advanced Analytics (DSAA), 2015. 36678 2015. IEEE International Conference on, ISBN: 978-1-4673-8273-1
開始ページ: 1
終了ページ: 9
出版社 DOI: 10.1109/DSAA.2015.7344801
抄録: Despite recent open data initiatives in many coun- tries, a significant percentage of the data provided is in non- machine-readable formats like image format rather than in a machine-readable electronic format, thereby restricting their usability. This paper describes the first unified framework for converting legacy open data in image format into a machine- readable and reusable format by using crowdsourcing. Crowd workers are asked not only to extract data from an image of a chart but also to reproduce the chart objects in spreadsheets. The properties of the reconstructed chart objects give their data structures including series names and values, which are useful for automatic processing of data by computer. Since results produced by crowdsourcing inherently contain errors, a quality control mechanism was developed that improves the accuracy of extracted tables by aggregating tables created by different workers for the same chart image and by utilizing the data structures obtained from the reproduced chart objects. Experimental results demonstrated that the proposed framework and mechanism are effective.
Rights: © 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
資料タイプ: proceedings (author version)
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 小山 聡


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