| Presentation | 2002/5/10 Image Enhancement of Text in Scenery Images for Degraded Character Recognition Hiroki TAKAHASHI, Kousuke OGATA, Masayuki NAKAJIMA, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper proposes a method to enhance text images for a system which extracts, recognizes and translates characters in scenery images captured by a digital camera. The proposed method magnifies text images in frequency domain. It restores hi-frequency component caused by JPEG(Joint Photographic Experts Group) compression and reduces mosquito noise and block noise caused by magnification process. The obtained enhanced text images are binarized and then recognized by a commercial character recognition software. Experiments are performed for printed documents, sign boards and plates captured by a digital camera. In our experiments, texts are manually extracted from images because our goal in this paper is image enhancement. compared with traditional approaches, the recognition ratio for our enhanced images by using a commercial character recognition software improves. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | DCT(Discrete Cosine Transform) / Image enhancement / Binarization / Degraded image / Character recognition |
| Paper # | PRMU2002-17 |
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| Conference Information | |
| Committee | PRMU |
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| Conference Date | 2002/5/10(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
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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) | Image Enhancement of Text in Scenery Images for Degraded Character Recognition |
| Sub Title (in English) | |
| Keyword(1) | DCT(Discrete Cosine Transform) |
| Keyword(2) | Image enhancement |
| Keyword(3) | Binarization |
| Keyword(4) | Degraded image |
| Keyword(5) | Character recognition |
| 1st Author's Name | Hiroki TAKAHASHI |
| 1st Author's Affiliation | Graduate School of Information Science & Engineering, Tokyo Institute of Technology() |
| 2nd Author's Name | Kousuke OGATA |
| 2nd Author's Affiliation | Graduate School of Information Science & Engineering, Tokyo Institute of Technology |
| 3rd Author's Name | Masayuki NAKAJIMA |
| 3rd Author's Affiliation | Graduate School of Information Science & Engineering, Tokyo Institute of Technology |
| Date | 2002/5/10 |
| Paper # | PRMU2002-17 |
| Volume (vol) | vol.102 |
| Number (no) | 55 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |