Geometric Calibration Algorithm of Polarization Camera Using Planar Patterns

Polarization pattern provides additional information besides spectral signatures. It can be used in many applications, such as navigation, defect detection and object identification. A novel polarization camera composed of four synchronized cameras is proposed, and it can realize real-time polarizat...

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Bibliographic Details
Published in:Shanghai jiao tong da xue xue bao 2017-02, Vol.22 (1), p.55-59
Main Author: 王玉杰 胡小平 练军想 张礼廉 何晓峰 范晨
Format: Article
Language:English
Subjects:
Algorithms
Architecture
Calibration
Cameras
Computer Science
Electrical Engineering
Engineering
Error analysis
Errors
Global optimization
Image acquisition
Information dissemination
Life Sciences
Materials Science
Navigation
Object recognition
Optimization
Polarization
Projection model
Real time
Spectral signatures
Time synchronization
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Summary:Polarization pattern provides additional information besides spectral signatures. It can be used in many applications, such as navigation, defect detection and object identification. A novel polarization camera composed of four synchronized cameras is proposed, and it can realize real-time polarization measurement. This study particularly concentrates on the geometric calibration of the system. The projection model is analyzed and the multi-camera calibration algorithm is proposed. Firstly, each camera is calibrated separately using planar patterns, and then the geometric calibration algorithms are performed. Due to the geometrical constraint, a global optimization method results in smaller estimation uncertainties. A mean rotation error of 0.025?and a mean translation error of 0.26 mm are achieved after geometric calibration. The images are rectified to establish a correspondence among cameras and are combined to acquire the polarization measurement. The polarization pattern of the skylight is measured by the system and the results are consistent with the previous studies.
ISSN:1007-1172
1995-8188
DOI:10.1007/s12204-017-1799-3