| Presentation | 2010-03-16 Improvement of Accuracy of Document Image Retrieval by Expanding Queries and Databases Megumi CHIKANO, Kazumasa IWATA, Koichi KISE, Masakazu IWAMURA, Seiichi UCHIDA, Shinichiro OMACHI, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this report, we propose a method to improve accuracy of document image retrieval for a camera-pen system. The system is to acquire handwriting on a printed document as digital ink. In this system, document image retrieval is employed to locate the pen-tip position. Features calculated based on the foreground image are used to retrieve the document image and the pen-tip position on it. A problem of this system is that severe perspective distortion in the query image prevents us from acquiring an accurate position. To solve this problem, we improve the discrimination power of the features using a perspective invariant. In addition, we propose two expansion methods which bring database image and query image closer. Database expansion is to store geometrically distorted images in the database, and query expansion is to generate transformed images from a query image. From the experimental results, we confirm that the best combination is the query expansion with the proposed feature. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | document image retrieval / document image processing / LLAH / handwriting / camera-pen system |
| Paper # | PRMU2009-319,HIP2009-204 |
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| Conference Information | |
| Committee | PRMU |
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| Conference Date | 2010/3/8(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Pattern Recognition and Media Understanding (PRMU) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Improvement of Accuracy of Document Image Retrieval by Expanding Queries and Databases |
| Sub Title (in English) | |
| Keyword(1) | document image retrieval |
| Keyword(2) | document image processing |
| Keyword(3) | LLAH |
| Keyword(4) | handwriting |
| Keyword(5) | camera-pen system |
| 1st Author's Name | Megumi CHIKANO |
| 1st Author's Affiliation | School of Engineering, Osaka Prefecture University() |
| 2nd Author's Name | Kazumasa IWATA |
| 2nd Author's Affiliation | Graduate School of Engineering, Osaka Prefecture University |
| 3rd Author's Name | Koichi KISE |
| 3rd Author's Affiliation | Graduate School of Engineering, Osaka Prefecture University |
| 4th Author's Name | Masakazu IWAMURA |
| 4th Author's Affiliation | Graduate School of Engineering, Osaka Prefecture University |
| 5th Author's Name | Seiichi UCHIDA |
| 5th Author's Affiliation | Faculity of Information Science and Electrical Engineering, Kyushu University |
| 6th Author's Name | Shinichiro OMACHI |
| 6th Author's Affiliation | Graduate School of Engineering, Tohoku University |
| Date | 2010-03-16 |
| Paper # | PRMU2009-319,HIP2009-204 |
| Volume (vol) | vol.109 |
| Number (no) | 470 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |