| Presentation | 2006-02-24 Extraction of character strings on a curved surface and correction of their distortion Takeshi SHIMBA, Yoshinori TAKEUCHI, Tetsuya MATSUMOTO, Hiroaki KUDO, Noboru OHNISHI, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A linear arrangement of characters on the curved surface is curved due to a slant viewing. This paper proposes a method to extract the curved character strings and to correct its distortion. The proposed method uses some general characteristics of a character string. First, we binarize an image based on edges using characteristics that there are high contrast in brightness between a characters and its background, and the color in a string is the same color. Second, we extract character strings by connecting regions using three characteristics: the size of a character is similar, the space between neighboring characters is short and characters are locally aligned. Third, we approximate the curved character string by the 2nd order polynomial and extract its area. Finally, by a curve model, we correct the curved character string to obtain a linear string. The experimental results show that the method can extract even curved strings and correct their distortion. The extraction accuracy is 60.5% of average precision and 62.7% of average recall. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | curved surface / curved character string / character extraction / string candidate extension |
| Paper # | TL2005-69,PRMU2005-204 |
| Date of Issue |
| Conference Information | |
| Committee | TL |
|---|---|
| Conference Date | 2006/2/17(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Thought and Language (TL) |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Extraction of character strings on a curved surface and correction of their distortion |
| 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 SHIMBA |
| 1st Author's Affiliation | Graduate school of Infomation Science, Nagoya University() |
| 2nd Author's Name | Yoshinori TAKEUCHI |
| 2nd Author's Affiliation | Infomation Security Promotion Agency, Nagoya University, BMC Research Center |
| 3rd Author's Name | Tetsuya MATSUMOTO |
| 3rd Author's Affiliation | Graduate school of Infomation Science, Nagoya University |
| 4th Author's Name | Hiroaki KUDO |
| 4th Author's Affiliation | Graduate school of Infomation Science, Nagoya University |
| 5th Author's Name | Noboru OHNISHI |
| 5th Author's Affiliation | Graduate school of Infomation Science, Nagoya University |
| Date | 2006-02-24 |
| Paper # | TL2005-69,PRMU2005-204 |
| Volume (vol) | vol.105 |
| Number (no) | 613 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |