| Presentation | 2013-03-11 Removing of curve and perspective distortion from document images captured by cameras Kouu YOU, Tetsuya MATSUMOTO, Yoshinori TAKEUCHI, Hiroaki KUDO, Noboru OHNISHI, |
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| PDF Download Page |  PDF download Page Link |
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| Abstract(in Japanese) | (See Japanese page) | |
| Abstract(in English) | We propose a method that can get character information from document images by removing curve and perspective distortions. In the proposed method, we extract character candidates and divide them by text-lines using the hoiiz)ntal overlap of neighboring characters and ^proximate the curve of text-lines by using 4^ | order polynomial. Then, we estimate the vertical lines based on invariant cross-ratio and vanishing point which extracted from the left and right edges. The estimated vertical lines and text-lines divide the image into grids. Finally, for each grid we calculate the perspective transform matrix and remove the distortions. Experimental results for 50 images of document images (30 Eiglish document images and 20 Japanes e/Chines e document images) show the effectiveness ofthe proposed method. |
| Keyword(in Japanese) | (See Japanese page) | |
| Keyword(in English) | Document images / OCR / Perspective dis tortion / Cross-ratio / Dewaiping | |
| Paper # | IMQ2012-61,IE2012-165,MVE2012-122,WIT2012-71 | |
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| Conference Information | |
| Committee | MVE |
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| Conference Date | 2013/3/4(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Media Experience and Virtual Environment (MVE) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Removing of curve and perspective distortion from document images captured by cameras |
| Sub Title (in English) | |
| Keyword(1) | Document images |
| Keyword(2) | OCR |
| Keyword(3) | Perspective dis tortion |
| Keyword(4) | Cross-ratio |
| Keyword(5) | Dewaiping |
| 1st Author's Name | Kouu YOU |
| 1st Author's Affiliation | Graduate school of Information Science, Nagoya University() |
| 2nd Author's Name | Tetsuya MATSUMOTO |
| 2nd Author's Affiliation | Graduate school of Information Science, Nagoya University |
| 3rd Author's Name | Yoshinori TAKEUCHI |
| 3rd Author's Affiliation | School of Informatics, Daido 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 | 2013-03-11 |
| Paper # | IMQ2012-61,IE2012-165,MVE2012-122,WIT2012-71 |
| Volume (vol) | vol.112 |
| Number (no) | 474 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |