| Presentation | 2010-11-18 An Improvement of Correction for Lens Distortion in Information Retrieval from Printed Image by Using Cellular Phones with Cameras Hiroshi KUDO, Takafumi SYONO, Mutsuji MUNEYASU, Yoshiko HANADA, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The information retrieval from the printed image by using a cellular phone attracts much attention. In this paper, we propose an improvement for the correction method of the lens distortion in capturing the image with the cellular phone. In the conventional method, a distortion coefficient has been determined based on the line based correction of radial distortion. This method has directly applied each candidate of the distortion coefficient in the predefined range to the captured image and the correctness of the applied distortion coefficient has been verified. However, many processing time should be required because of a lot of verified points. Therefore, to improve the processing speeds, the golden section search method for the estimation of the distortion coefficients is adopted. Moreover we propose an improvement method for the better accuracy of the estimation of the distortion coefficients. In the proposed method, all sides of the image are used for the correction. The experimental result shows the reduction of the processing time and the estimation accuracy of the distortion coefficient. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | watermark / lens distortion / golden section method / printed image / estimation of distortion coefficient |
| Paper # | CAS2010-71,CST2010-44 |
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| Conference Information | |
| Committee | CAS |
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| Conference Date | 2010/11/11(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Circuits and Systems (CAS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | An Improvement of Correction for Lens Distortion in Information Retrieval from Printed Image by Using Cellular Phones with Cameras |
| Sub Title (in English) | |
| Keyword(1) | watermark |
| Keyword(2) | lens distortion |
| Keyword(3) | golden section method |
| Keyword(4) | printed image |
| Keyword(5) | estimation of distortion coefficient |
| 1st Author's Name | Hiroshi KUDO |
| 1st Author's Affiliation | Faculty of Engineering Science, Kansai University() |
| 2nd Author's Name | Takafumi SYONO |
| 2nd Author's Affiliation | Faculty of Engineering Science, Kansai University |
| 3rd Author's Name | Mutsuji MUNEYASU |
| 3rd Author's Affiliation | Faculty of Engineering Science, Kansai University |
| 4th Author's Name | Yoshiko HANADA |
| 4th Author's Affiliation | Faculty of Engineering Science, Kansai University |
| Date | 2010-11-18 |
| Paper # | CAS2010-71,CST2010-44 |
| Volume (vol) | vol.110 |
| Number (no) | 283 |
| Page | pp.pp.- |
| #Pages | 4 |
| Date of Issue | |