| Presentation | 2020-02-27 Estimation of camera parameters from starry photographs Naoto Ishikawa, Yoshinori Dobashi, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Estimation of the range of the sky captured by a starry photograph is useful for classification or editing of the images of the night sky. We propose a method for estimating camera parameters used to capture starry images. The previous method requires precomputation of index data from a database of positions of all stars. Furthermore, the method takes long time to estimate the range of the sky captured in a given input image. In this article, we present a method that estimates the camera parameters used to capture an input wide-angle image without the precomputation. Our method is much faster and more accurate than the previous method. Our method computes area ratios of stars in the input image and use them to extract necessary data from a star catalogue. The camera parameters are estimated by simple geometric calculations. Our method achieves more than ten times faster computation. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Starry Photograph / Constellation / Astrometry / Star Tracker / Pattern Matching |
| Paper # | ITS2019-40,IE2019-78 |
| Date of Issue | 2020-02-20 (ITS, IE) |
| Conference Information | |
| Committee | ITE-HI / IE / ITS / ITE-MMS / ITE-ME / ITE-AIT |
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| Conference Date | 2020/2/27(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Hokkaido Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Image Processing, etc. |
| Chair | Takehiro Nagai(Tokyo Inst. of Tech.) / / / Norihiko Ishii(NHK) / Norio Tagawa(Tokyo Metropolitan Univ.) / Nobuhiko Mukai(Tokyo Cisy Univ.) |
| Vice Chair | / / / / Hiroyuki Arai(Nippon Institute of Technology) / Hisaki Nate(Tokyo Polytechnic Univ.) |
| Secretary | (NTT) / / / (Fukuoka Univ.) / Hiroyuki Arai(NHK) / Hisaki Nate(NHK) |
| Assistant | |
| Paper Information | |
| Registration To | Technical Group on Human Inormation / Technical Committee on Image Engineering / Technical Committee on Intelligent Transport Systems Technology / Technical Group on Multi-media Storage / Technical Group on Media Engineering / Technical Group on Artistic Image Technology |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Estimation of camera parameters from starry photographs |
| Sub Title (in English) | |
| Keyword(1) | Starry Photograph |
| Keyword(2) | Constellation |
| Keyword(3) | Astrometry |
| Keyword(4) | Star Tracker |
| Keyword(5) | Pattern Matching |
| 1st Author's Name | Naoto Ishikawa |
| 1st Author's Affiliation | Hokkaido University(Hokkaido Univ.) |
| 2nd Author's Name | Yoshinori Dobashi |
| 2nd Author's Affiliation | Hokkaido University(Hokkaido Univ.) |
| Date | 2020-02-27 |
| Paper # | ITS2019-40,IE2019-78 |
| Volume (vol) | vol.119 |
| Number (no) | ITS-421,IE-422 |
| Page | pp.pp.213-218(ITS), pp.213-218(IE), |
| #Pages | 6 |
| Date of Issue | 2020-02-20 (ITS, IE) |