| 한글제목(Korean Title) |
An Improved Fast Camera Calibration Method for Mobile Terminals |
| 영문제목(English Title) |
An Improved Fast Camera Calibration Method for Mobile Terminals |
| 저자(Author) |
Fang-li Guan
Ai-jun Xu
Guang-yu Jiang
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| 원문수록처(Citation) |
VOL 15 NO. 05 PP. 1082 ~ 1095 (2019. 10) |
한글내용
(Korean Abstract) |
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영문내용
(English Abstract) |
Camera calibration is an important part of machine vision and close-range photogrammetry. Since current calibration methods fail to obtain ideal internal and external camera parameters with limited computing resources on mobile terminals efficiently, this paper proposes an improved fast camera calibration method for mobile terminals. Based on traditional camera calibration method, the new method introduces two-order radial distortion and tangential distortion models to establish the camera model with nonlinear distortion items. Meanwhile, the nonlinear least square L-M algorithm is used to optimize parameters iteration, the new method can quickly obtain high-precise internal and external camera parameters. The experimental results show that the new method improves the efficiency and precision of camera calibration. Terminals simulation experiment on PC indicates that the time consuming of parameter iteration reduced from 0.220 seconds to 0.063 seconds (0.234 seconds on mobile terminals) and the average reprojection error reduced from 0.25 pixel to 0.15 pixel. Therefore, the new method is an ideal mobile terminals camera calibration method which can expand the application range of 3D reconstruction and close-range photogrammetry technology on mobile terminals.
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| 키워드(Keyword) |
Camera Calibration Technique
Camera Distortion Correction
Close-Range Photogrammetry
Machine Vision
Mobile Terminals
Pinhole Model
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| 파일첨부 |
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