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Paper Abstract and Keywords
Presentation 2020-02-27 14:55
Estimation of camera parameters from starry photographs
Naoto Ishikawa, Yoshinori Dobashi (Hokkaido Univ.)
Abstract (in Japanese) (See Japanese page) 
(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) 
(in English) Starry Photograph / Constellation / Astrometry / Star Tracker / Pattern Matching / / /  
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Conference Information
Committee HI IEICE-IE IEICE-ITS MMS ME AIT  
Conference Date 2020-02-27 - 2020-02-28 
Place (in Japanese) (See Japanese page) 
Place (in English) Hokkaido Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Image Processing, etc. 
Paper Information
Registration To IEICE-IE 
Conference Code 2020-02-HI-IE-ITS-MMS-ME-AIT 
Language Japanese 
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  
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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.)
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Speaker Author-1 
Date Time 2020-02-27 14:55:00 
Presentation Time 15 minutes 
Registration for IEICE-IE 
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Volume (vol) vol.44 
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