Fast Barrel Distortion Correction for Wide-Angle Cameras

Tae-Hwan KIM

IEICE TRANSACTIONS on Information and Systems   Vol.E98-D    No.7    pp.1413-1416
Publication Date: 2015/07/01
Publicized: 2015/04/01
Online ISSN: 1745-1361
DOI: 10.1587/transinf.2014EDL8236
Type of Manuscript: LETTER
Category: Image Processing and Video Processing
barrel distortion correction,  optical distortion,  wide-angle cameras,  image enhancement,  

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Barrel distortion is a critical problem that can hinder the successful application of wide-angle cameras. This letter presents an implementation method for fast correction of the barrel distortion. In the proposed method, the required scaling factor is obtained by interpolating a mapping polynomial with a non-uniform spline instead of calculating it directly, which reduces the number of computations required for the distortion correction. This reduction in the number of computations leads to faster correction while maintaining quality: when compared to the conventional method, the reduction ratio of the correction time is about 89%, and the correction quality is 35.3 dB in terms of the average peak signal-to-noise ratio.