A two-step high-precision distortion correction algorithm of wide-angle lens

Hui Yang; Lu Xu; Wenyi Chen

doi:10.1117/12.2075892

19 February 2015 A two-step high-precision distortion correction algorithm of wide-angle lens

Hui Yang, Lu Xu, Wenyi Chen

Proceedings Volume 9449, The International Conference on Photonics and Optical Engineering (icPOE 2014); 944929 (2015) https://doi.org/10.1117/12.2075892
Event: The International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference (icPOE 2014), 2014, Xi'an, China

Abstract

As the performance of the previous distortion correction methods is not well for the wide-angel lens, we present a two-step correction algorithm for wide-angle distortion by using the Division Model and the coherent detection. In our algorithm, a grid template is used as the calibration target. Firstly, we approximate the distortion characteristic of wide-angle lens with single parameter Division Model, and then fit the distorted straight line with a circular arc to calculate the distortion parameter and distorted center. Secondly, we correct the residually distorted image, which is gotten from the previous step, with coherent detection to compensate the error between Division Model and the distortion characteristics of wide-angle lens. The quantitative assessment and experiment results show that the presented distortion correction algorithm is easy to achieve and has high accuracy.

Citation Download Citation

Hui Yang, Lu Xu, and Wenyi Chen "A two-step high-precision distortion correction algorithm of wide-angle lens", Proc. SPIE 9449, The International Conference on Photonics and Optical Engineering (icPOE 2014), 944929 (19 February 2015); https://doi.org/10.1117/12.2075892

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KEYWORDS

Distortion

Detection and tracking algorithms

Calibration

Precision calibration

Image sensors

Linear filtering

Performance modeling

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