| Presentation | 2005-06-17 Extracting Characters on a Curved Surface Takeshi SHINBA, Yoshinori TAKEUCHI, Tetsuya MATSUMOTO, Hiroaki KUDO, Noboru OHNISHI, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The projective distortion is caused when taking a picture of the characters written in the curved surface. Therefore, the character strings arranged in the straight line become rounded due to the angle of taking a picture. In this paper, we propose a method to extract the curved character strings. The input image is initially binarized in order to extract character regions. Because of the high contrast between character regions and background, we adopted a local threshold technique on the extracted edge image for binarization. The character-string-candidates are then extracted from the binary image using the size and proximity of characters in strings. Finally, these string-candidates are extended to expect character strings using distance and height thresholds of the neighboring candidates. The experimental result demonstrates the potentiality of the proposed approach that extracts the curved character strings including the extraction accuracy with 44.1% precision and 52.3% recall. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | curved surface / curved character string / character extraction / string candidate extension |
| Paper # | DE2005-14,PRMU2005-35 |
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| Conference Information | |
| Committee | DE |
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| Conference Date | 2005/6/10(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Data Engineering (DE) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Extracting Characters on a Curved Surface |
| Sub Title (in English) | |
| Keyword(1) | curved surface |
| Keyword(2) | curved character string |
| Keyword(3) | character extraction |
| Keyword(4) | string candidate extension |
| 1st Author's Name | Takeshi SHINBA |
| 1st Author's Affiliation | Graduate school of Information Science, Nagoya University() |
| 2nd Author's Name | Yoshinori TAKEUCHI |
| 2nd Author's Affiliation | Information Security Promotion Agency, Nagoya University, BMC Research Center, RIKEN |
| 3rd Author's Name | Tetsuya MATSUMOTO |
| 3rd Author's Affiliation | Graduate school of Information Science, Nagoya University |
| 4th Author's Name | Hiroaki KUDO |
| 4th Author's Affiliation | Graduate school of Information Science, Nagoya University |
| 5th Author's Name | Noboru OHNISHI |
| 5th Author's Affiliation | Graduate school of Information Science, Nagoya University |
| Date | 2005-06-17 |
| Paper # | DE2005-14,PRMU2005-35 |
| Volume (vol) | vol.105 |
| Number (no) | 117 |
| Page | pp.pp.- |
| #Pages | 6 |
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