Depth-Dependent High Distortion Lens Calibration

[EN] Accurate correction of high distorted images is a very complex problem. Several lens distortion models exist that are adjusted using different techniques. Usually, regardless of the chosen model, a unique distortion model is adjusted to undistort images and the camera-calibration template distance is not considered. Several authors have presented the depth dependency of lens distortion but none of them have treated it with highly distorted images. This paper presents an analysis of the distortion depth dependency in strongly distorted images. The division model that is able to represent high distortion with only one parameter is modified to represent a depth-dependent high distortion lens model. The proposed calibration method obtains more accurate results when compared to existing calibration methods.The Instituto de Automatica e Informatica Industrial (ai2) of the Universitat Politecnica de Valencia has financed the open access fees of this paper.Ricolfe Viala, C.; Esparza Peidro, A. (2020). Depth-Dependent High Distortion Lens Calibration. Sensors. 20(13):1-12. https://doi.org/10.3390/s20133695S1122013Ricolfe-Viala, C., & Sanchez-Salmeron, A.-J. (2010). Lens distortion models evaluation. Applied Optics, 49(30), 5914. doi:10.1364/ao.49.005914Wieneke, B. (2008). Volume self-calibration for 3D particle image velocimetry. Experiments in Fluids, 45(4), 549-556. doi:10.1007/s00348-008-0521-5Magill, A. A. (1955). Variation in Distortion with Magnification*. Journal of the Optical Society of America, 45(3), 148. doi:10.1364/josa.45.000148Fryer, J. G., & Fraser, C. S. (2006). ON THE CALIBRATION OF UNDERWATER CAMERAS. The Photogrammetric Record, 12(67), 73-85. doi:10.1111/j.1477-9730.1986.tb00539.xAlvarez, L., Gómez, L., & Sendra, J. R. (2010). Accurate Depth Dependent Lens Distortion Models: An Application to Planar View Scenarios. Journal of Mathematical Imaging and Vision, 39(1), 75-85. doi:10.1007/s10851-010-0226-2Ricolfe-Viala, C., Sanchez-Salmeron, A.-J., & Martinez-Berti, E. (2011). Accurate calibration with highly distorted images. Applied Optics, 51(1), 89. doi:10.1364/ao.51.000089Ricolfe-Viala, C., & Sánchez-Salmerón, A.-J. (2010). Robust metric calibration of non-linear camera lens distortion. Pattern Recognition, 43(4), 1688-1699. doi:10.1016/j.patcog.2009.10.003Devernay, F., & Faugeras, O. (2001). Straight lines have to be straight. Machine Vision and Applications, 13(1), 14-24. doi:10.1007/pl0001326

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