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A New Method Using Geometric Invariability for Lens Distortion Correction  

Cao, Van-Toan (School of Electrical Engineering, University of Ulsan)
Cho, Sang-Bock (School of Electrical Engineering, University of Ulsan)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.48, no.6, 2011 , pp. 115-123 More about this Journal
Abstract
Most of cameras being used in practice induce lens distortion; the amount of distortion depends on the specific applications as well as the camera cost. Up to now, many methods of lens distortion correction have relied on invariant properties of projective geometry to find distortion parameters. A common property is "the straight line in scene is straight line in image". However, if the straight lines are also parallel together, the previous works have missed this restriction in determining lens distortion parameters. In this paper, we propose a method that leads to guarantee of the restrictions simultaneously for the determination. Therefore, corrected image will close to an ideal image taken by the pinhole camera model. The effectiveness of the proposed method is verified by our experiments on both synthetic images and real images.
Keywords
lens distortion; radial distortion; distortion model; invariant;
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