| Presentation | 2015-02-19 Probabilistic Interpolation for Improving Three Dimensional Rotation Angle Estimation of Camera-captured Characters Kanta KURAMOTO, Wataru OHYAMA, Tetsushi WAKABAYASHI, Fumitaka KIMURA, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | It is necessary to recognize various accompanying information other than the character type in Camera-Based Optical Character Recognition. In this paper, we propose an efficient implementation of 3D rotation estimation for camera-captured characters. The proposed implementation requires small memory load and short computational time. We employ Linear Discriminant Function (LDF) instead of Modified Quadratic Discriminant Function (MQDF) for further memory reduction. The results of experimental evaluation using a alphanumeric character dataset showed that small number of dimensionality of original feature vector is sufficient for keeping accuracy of 3D rotation estimation and total amount of memory required for 3D rotation estimation is reduced from 1.7 GB to 6.6 MB. Moreover, we proposed probabilistic rotation angle estimation and achieved improvement of estimation accuray without increase of memory size. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | camera-based OCR / rotation angle estimation / gray-scale gradient feature / MQDF / probabilistic interpolation |
| Paper # | PRMU2014-116,CNR2014-31 |
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| Conference Information | |
| Committee | PRMU |
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| Conference Date | 2015/2/12(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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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) | Probabilistic Interpolation for Improving Three Dimensional Rotation Angle Estimation of Camera-captured Characters |
| Sub Title (in English) | |
| Keyword(1) | camera-based OCR |
| Keyword(2) | rotation angle estimation |
| Keyword(3) | gray-scale gradient feature |
| Keyword(4) | MQDF |
| Keyword(5) | probabilistic interpolation |
| 1st Author's Name | Kanta KURAMOTO |
| 1st Author's Affiliation | Graduate School of Engineering, Mie University() |
| 2nd Author's Name | Wataru OHYAMA |
| 2nd Author's Affiliation | Graduate School of Engineering, Mie University |
| 3rd Author's Name | Tetsushi WAKABAYASHI |
| 3rd Author's Affiliation | Graduate School of Engineering, Mie University |
| 4th Author's Name | Fumitaka KIMURA |
| 4th Author's Affiliation | Graduate School of Engineering, Mie University |
| Date | 2015-02-19 |
| Paper # | PRMU2014-116,CNR2014-31 |
| Volume (vol) | vol.114 |
| Number (no) | 454 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |