Geodetski list, Vol. 70 (93) No. 1, 2016.
Preliminary communication
The Algorithm for the Precise Elimination of Lens Distortion Influence on Digital Cameras
Mateo Gašparović
orcid.org/0000-0003-2345-7882
; Faculty of Geodesy, University of Zagreb, Zagreb, Croatia
Dubravko Gajski
orcid.org/0000-0002-0237-647X
; Faculty of Geodesy, University of Zagreb, Zagreb, Croatia
Abstract
In this paper the algorithm for precise elimination of the impact of lens distortion in digital camera will be shown. The paper explains in detail the theoretical basis and mathematical model on which the algorithm is based on. The development of photogrammetric tools in the past years increased interest in photogrammetry and its products. Those are primarily the algorithms for automatic correlation and producing thick clouds of points which are the basis for the production of photo-realistic 3D models. As photogrammetric product, photo-realistic 3D model is today the most interesting product to a wider audience, both in the visualization and the measurement purposes. Given the large number of photogrammetric tools there is a problem of quality of modelling elements of internal orientation of the camera. A lot of software has quality and optimized algorithms for automatic correlation but however the end results are often limited by their accuracy because of the insufficient quality of mathematical models for modelling of distortion and other geometric errors of the image. This algorithm allows that by the calibration parameters of the camera based on appropriate and highly precise mathematical models for modelling of distortion, conducted by the calibration process, the original footage is transformed into an idealized image from which most of the geometric errors of the camera are removed. Such idealized image can be used in a variety of photogrammetric tools.
Keywords
algorithm; lens distortion; camera calibration; photogrammetry; idealized image
Hrčak ID:
156881
URI
Publication date:
25.3.2016.
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