parameters calibration;
focused light field camera;
edge spread information fitting;
internal parameters;
corner detection;
DEPTH ESTIMATION;
D O I:
10.3390/photonics10020187
中图分类号:
O43 [光学];
学科分类号:
070207 ;
0803 ;
摘要:
In this paper, a novel method based on edge spread information fitting (ESIF) is proposed to accurately calibrate the geometric parameters of a focused light field camera. A focused light field camera with flexible adjustment of spatial resolution and angular resolution is designed and built to capture the four-dimensional light field information of the scenes, and the geometric relationship between the focus plane of the camera and its internal parameters is derived to establish and simplify the calibration model. After that, a new algorithm based on sub-pixel edge fitting is designed to accurately detect corners, and the minimum corner size can be calculated to confirm the focus plane. In the simulation experiments, the error is 0.083% between the ground truth and the calibration result. The physical experiments show that our method is effective and reliable for the geometric calibration of a focused light field camera. Our method cleverly utilizes the special imaging geometric relationship of the focused light field camera to ensure the better calibration accuracy, which makes the calibration process more reliable.
机构:
Xi An Jiao Tong Univ, State Key Lab Mfg Syst Engn, Xian 710049, Peoples R ChinaXi An Jiao Tong Univ, State Key Lab Mfg Syst Engn, Xian 710049, Peoples R China
Yang, Xieliu
Fang, Suping
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机构:
Xi An Jiao Tong Univ, State Key Lab Mfg Syst Engn, Xian 710049, Peoples R ChinaXi An Jiao Tong Univ, State Key Lab Mfg Syst Engn, Xian 710049, Peoples R China
机构:
Beijing Univ Chem Technol, Coll Informat Sci & Technol, Bei San Huan East Rd 15, Beijing 100029, CO, Peoples R ChinaBeijing Univ Chem Technol, Coll Informat Sci & Technol, Bei San Huan East Rd 15, Beijing 100029, CO, Peoples R China
Zhu, H.
Chang, S.
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机构:
Beijing Univ Chem Technol, Coll Informat Sci & Technol, Bei San Huan East Rd 15, Beijing 100029, CO, Peoples R ChinaBeijing Univ Chem Technol, Coll Informat Sci & Technol, Bei San Huan East Rd 15, Beijing 100029, CO, Peoples R China
Chang, S.
Yang, P.
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机构:
Natl Inst Metrol, Div Mech & Acoust, Acoust Lab, Bei San Huan East Rd 18, Beijing 100029, CO, Peoples R ChinaBeijing Univ Chem Technol, Coll Informat Sci & Technol, Bei San Huan East Rd 15, Beijing 100029, CO, Peoples R China
Yang, P.
He, L.
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机构:
Natl Inst Metrol, Div Mech & Acoust, Acoust Lab, Bei San Huan East Rd 18, Beijing 100029, CO, Peoples R ChinaBeijing Univ Chem Technol, Coll Informat Sci & Technol, Bei San Huan East Rd 15, Beijing 100029, CO, Peoples R China
机构:
Minist Publ Secur, Res Inst 3, Cyber Phys Syst R&D Ctr, Shanghai, Peoples R China
Shanghai Int Technol & Trade United Co Ltd, Shanghai, Peoples R ChinaMinist Publ Secur, Res Inst 3, Cyber Phys Syst R&D Ctr, Shanghai, Peoples R China
Duan, Huixian
Mei, Lin
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Minist Publ Secur, Res Inst 3, Cyber Phys Syst R&D Ctr, Shanghai, Peoples R ChinaMinist Publ Secur, Res Inst 3, Cyber Phys Syst R&D Ctr, Shanghai, Peoples R China
Mei, Lin
Wang, Jun
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机构:
Minist Publ Secur, Res Inst 3, Cyber Phys Syst R&D Ctr, Shanghai, Peoples R ChinaMinist Publ Secur, Res Inst 3, Cyber Phys Syst R&D Ctr, Shanghai, Peoples R China
Wang, Jun
Song, Lei
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机构:
Minist Publ Secur, Res Inst 3, Cyber Phys Syst R&D Ctr, Shanghai, Peoples R China
Shenzhen Univ, Shenzhen Key Lab Media Secur, Shenzhen, Peoples R ChinaMinist Publ Secur, Res Inst 3, Cyber Phys Syst R&D Ctr, Shanghai, Peoples R China
Song, Lei
Liu, Na
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机构:
Minist Publ Secur, Res Inst 3, Cyber Phys Syst R&D Ctr, Shanghai, Peoples R ChinaMinist Publ Secur, Res Inst 3, Cyber Phys Syst R&D Ctr, Shanghai, Peoples R China