| Presentation | 2019-12-20 Non-Orthogonal Cross Point Detection with Function and Numerical Models Nobuhiko Wakai, Takeo Azuma, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper studies non-orthogonal cross point detection problem for a fish-eye camera calibration. We suggest that cross point detector for checker pattern images which captured with fish-eye camera. Our method estimates cross points with cascaded two steps. First, expanded logistic function using two lines parameterized with their rotations to fit checker patters as 3-dimentional shapes composed of two-dimensional pixel coordinates and pixel values. The logistic function is differentiable and used for searching parameters by decent algorithms to detect cross point roughly. Second, A numerical model is defined by areas separated with higher and lower pixel values. This numerical model is fitted for three-dimensional and parameterized for accumulated pixel values to express subpixel resolution. Experiment results in simulations show that our proposed method detects cross points with 0.05 pixels in root-mean-square error. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Cross Point Detection / Corner Detection / Fish-eye Camera / Camera Calibration |
| Paper # | PRMU2019-60 |
| Date of Issue | 2019-12-12 (PRMU) |
| Conference Information | |
| Committee | PRMU |
|---|---|
| Conference Date | 2019/12/19(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Yoichi Sato(Univ. of Tokyo) |
| Vice Chair | Toru Tamaki(Hiroshima Univ.) / Akisato Kimura(NTT) |
| Secretary | Toru Tamaki(NTT) / Akisato Kimura(OMRON SINICX) |
| Assistant | Yusuke Uchida(DeNA) / Takayoshi Yamashita(Chubu Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Pattern Recognition and Media Understanding |
|---|---|
| Language | ENG-JTITLE |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Non-Orthogonal Cross Point Detection with Function and Numerical Models |
| Sub Title (in English) | |
| Keyword(1) | Cross Point Detection |
| Keyword(2) | Corner Detection |
| Keyword(3) | Fish-eye Camera |
| Keyword(4) | Camera Calibration |
| 1st Author's Name | Nobuhiko Wakai |
| 1st Author's Affiliation | Panasonic Corporation(Panasonic) |
| 2nd Author's Name | Takeo Azuma |
| 2nd Author's Affiliation | OmniVision Technologies, Inc.(OmniVision Technologies) |
| Date | 2019-12-20 |
| Paper # | PRMU2019-60 |
| Volume (vol) | vol.119 |
| Number (no) | PRMU-347 |
| Page | pp.pp.87-92(PRMU), |
| #Pages | 6 |
| Date of Issue | 2019-12-12 (PRMU) |