Publikace detail

The Automatic Undistortion Strength Estimation for Any Describable Optical Distortion

Autoři: Chmelařová Natalija | Chmelař Pavel | Rejfek Luboš

Rok: 2019

Druh publikace: článek ve sborníku

Název zdroje: 29th International Conference Radioelektronika, RADIOELEKTRONIKA 2019

Název nakladatele: IEEE (Institute of Electrical and Electronics Engineers)

Místo vydání: New York

Strana od-do: 258-262

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
cze	The Automatic Undistortion Strength Estimation for Any Describable Optical Distortion	A presence of an optical distortion does undesired influence on the geometrical image quality. The main reason of its occurring is using a lens with low or variable focal length or simple camera optics. When an image captured by a camera is affected by undesired distortion and it is used for the distance measurement, it can cause significant measurement errors. The aim of this paper is to introduce a method for finding an optimal undistortion parameter for any optical distortion, which can be described mathematically. The proposed method uses the Hough transformation accumulator and at each iteration step the quality of straight lines is evaluated as a gradient from local maximum. The algorithm is verified and assessed on several images. The developed approach can be used to find the global maximum gradient in general, even when a local maximum changes its size over iterations.	optical distortion; distance measurement; Hough transform; gradient method
eng	The Automatic Undistortion Strength Estimation for Any Describable Optical Distortion	A presence of an optical distortion does undesired influence on the geometrical image quality. The main reason of its occurring is using a lens with low or variable focal length or simple camera optics. When an image captured by a camera is affected by undesired distortion and it is used for the distance measurement, it can cause significant measurement errors. The aim of this paper is to introduce a method for finding an optimal undistortion parameter for any optical distortion, which can be described mathematically. The proposed method uses the Hough transformation accumulator and at each iteration step the quality of straight lines is evaluated as a gradient from local maximum. The algorithm is verified and assessed on several images. The developed approach can be used to find the global maximum gradient in general, even when a local maximum changes its size over iterations.	optical distortion; distance measurement; Hough transform; gradient method

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