| Presentation | 2006-02-23 Use of Affine Invariants and Similarity Invariants in Fast Camera-based Document Image Retrieval Tomohiro NAKAI, Koichi KISE, Masakazu IWAMURA, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We have already proposed a method of camera-based document image retrieval which utilizes perspective invariants called cross-ratios. However, the cross-ratios have defects that they are unstable against changes of positions of feature points. In this paper, we evaluate the use of affine invariants and similarity invariants which are considered to be more stable. Experimental results have shown that higher accuracy is obtained with affine invarinats even under perspective distortion. It is also shown that similarity invariants are not suitable for retrieval of largely distorted images since they are not robust to perspective distortion. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Document image retrieval / Digital camera / Affine invariant / Similarity invariant / Hashing / Voting |
| Paper # | TL2005-53,PRMU2005-188 |
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| Conference Information | |
| Committee | PRMU |
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| Conference Date | 2006/2/16(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) | Use of Affine Invariants and Similarity Invariants in Fast Camera-based Document Image Retrieval |
| Sub Title (in English) | |
| Keyword(1) | Document image retrieval |
| Keyword(2) | Digital camera |
| Keyword(3) | Affine invariant |
| Keyword(4) | Similarity invariant |
| Keyword(5) | Hashing |
| Keyword(6) | Voting |
| 1st Author's Name | Tomohiro NAKAI |
| 1st Author's Affiliation | Graduate School of Engineering, Osaka Prefecture University() |
| 2nd Author's Name | Koichi KISE |
| 2nd Author's Affiliation | Graduate School of Engineering, Osaka Prefecture University |
| 3rd Author's Name | Masakazu IWAMURA |
| 3rd Author's Affiliation | Graduate School of Engineering, Osaka Prefecture University |
| Date | 2006-02-23 |
| Paper # | TL2005-53,PRMU2005-188 |
| Volume (vol) | vol.105 |
| Number (no) | 614 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |