Expansion of queries and databases for improving the retrieval accuracy of document portions

An application to a camera-pen system

Koichi Kise, Masakazu Iwamura, Megumi Chikano, Seiichi Uchida, Kazumasa Iwata, Shinichiro Omachi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Citations (Scopus)

Abstract

This paper presents a method of improving the accuracy of document image retrieval focusing on the application to a camera-pen system. In a camera-pen system, document image retrieval is employed for locating the pen-tip position on a page. A serious problem is that since the camera is mounted close to the pen-tip, the camera captures only a tiny portion of the page and the resultant image is under severe perspective distortion, resulting in lowering the retrieval accuracy. To solve this problem, we propose new geometrically invariant features as well as expansion techniques which increase the number of index features of either the database or the query images. Prom the experimental results, it has been found that the query expansion technique with features by combining affine and perspective invariants allows us the best performance that improves the accuracy of a baseline method more than 27%.

Original languageEnglish
Title of host publicationProceedings of the 9th IAPR International Workshop on Document Analysis Systems, DAS '10
Pages309-316
Number of pages8
DOIs
Publication statusPublished - Aug 2 2010
Event2010 IAPR Workshop on Document Analysis Systems, DAS 2010 - Boston, MA, United States
Duration: Jun 9 2010Jun 11 2010

Other

Other2010 IAPR Workshop on Document Analysis Systems, DAS 2010
CountryUnited States
CityBoston, MA
Period6/9/106/11/10

Fingerprint

Light pens
Cameras
Image retrieval

All Science Journal Classification (ASJC) codes

  • Human-Computer Interaction
  • Computer Networks and Communications
  • Computer Vision and Pattern Recognition
  • Software

Cite this

Kise, K., Iwamura, M., Chikano, M., Uchida, S., Iwata, K., & Omachi, S. (2010). Expansion of queries and databases for improving the retrieval accuracy of document portions: An application to a camera-pen system. In Proceedings of the 9th IAPR International Workshop on Document Analysis Systems, DAS '10 (pp. 309-316) https://doi.org/10.1145/1815330.1815370

Expansion of queries and databases for improving the retrieval accuracy of document portions : An application to a camera-pen system. / Kise, Koichi; Iwamura, Masakazu; Chikano, Megumi; Uchida, Seiichi; Iwata, Kazumasa; Omachi, Shinichiro.

Proceedings of the 9th IAPR International Workshop on Document Analysis Systems, DAS '10. 2010. p. 309-316.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kise, K, Iwamura, M, Chikano, M, Uchida, S, Iwata, K & Omachi, S 2010, Expansion of queries and databases for improving the retrieval accuracy of document portions: An application to a camera-pen system. in Proceedings of the 9th IAPR International Workshop on Document Analysis Systems, DAS '10. pp. 309-316, 2010 IAPR Workshop on Document Analysis Systems, DAS 2010, Boston, MA, United States, 6/9/10. https://doi.org/10.1145/1815330.1815370
Kise K, Iwamura M, Chikano M, Uchida S, Iwata K, Omachi S. Expansion of queries and databases for improving the retrieval accuracy of document portions: An application to a camera-pen system. In Proceedings of the 9th IAPR International Workshop on Document Analysis Systems, DAS '10. 2010. p. 309-316 https://doi.org/10.1145/1815330.1815370
Kise, Koichi ; Iwamura, Masakazu ; Chikano, Megumi ; Uchida, Seiichi ; Iwata, Kazumasa ; Omachi, Shinichiro. / Expansion of queries and databases for improving the retrieval accuracy of document portions : An application to a camera-pen system. Proceedings of the 9th IAPR International Workshop on Document Analysis Systems, DAS '10. 2010. pp. 309-316
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