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Proceedings Paper

Full-field calibration and compensation of lateral chromatic aberration based on unwrapped phase
Author(s): Xiaohong Liu; Shujun Huang; Zonghua Zhang; Feng Gao; Xiangqian Jiang
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Paper Abstract

Lateral chromatic aberration (CA) of color cameras has great effects on the imaging quality. This paper presents a novel method to full-field calibrate lateral CA between color channels by using unwrapped phase data. Closed circle sinusoidal fringe patterns having the optimum three-fringe numbers are generated and displayed on a liquid crystal screen consecutively through red, green and blue channels. These closed fringe patterns are captured by a color camera. The wrapped phase and unwrapped phase of each pixel can be calculated by using four-step phase shifting algorithm and optimum three-fringe number method, respectively. The pixel deviations produced by lateral CA are computed by comparing the obtained absolute phase data between red, blue, and green channels in polar coordinate system and calibration is accomplished in Cartesian coordinate system. Lateral CA between color channels of the color camera can be compensated by using the calibrated data. Simulated and experimental results show the validity of the proposed calibration and compensation method.

Paper Details

Date Published: 31 October 2016
PDF: 9 pages
Proc. SPIE 10021, Optical Design and Testing VII, 1002119 (31 October 2016); doi: 10.1117/12.2245839
Show Author Affiliations
Xiaohong Liu, Hebei Univ. of Technology (China)
Shujun Huang, Hebei Univ. of Technology (China)
Zonghua Zhang, Hebei Univ. of Technology (China)
Univ. of Huddersfield (United Kingdom)
Feng Gao, Univ. of Huddersfield (United Kingdom)
Xiangqian Jiang, Univ. of Huddersfield (United Kingdom)

Published in SPIE Proceedings Vol. 10021:
Optical Design and Testing VII
Yongtian Wang; Tina E. Kidger; Kimio Tatsuno, Editor(s)

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