Accuracy analysis of automatic distortion correction

Abstract

The paper addresses the problem of the automatic distortion removal from images acquired with non-metric SLR camera equipped with prime lenses. From the photogrammetric point of view the following question arises: is the accuracy of distortion control data provided by the manufacturer for a certain lens model (not item) sufficient in order to achieve demanded accuracy? In order to obtain the reliable answer to the aforementioned problem the two kinds of tests were carried out for three lens models. Firstly the multi-variant camera calibration was conducted using the software providing full accuracy analysis. Secondly the accuracy analysis using check points took place. The check points were measured in the images resampled based on estimated distortion model or in distortion-free images simply acquired in the automatic distortion removal mode. The extensive conclusions regarding application of each calibration approach in practice are given. Finally the rules of applying automatic distortion removal in photogrammetric measurements are suggested.

Calibration of Non-Metric Uav Camera Using Different Test Fields

“…The measurement methods based on properly processed digital images have become increasingly popular in recent years. The development of photogrammetric software followed by the automation of image orientation has facilitated the use of the studies on photogrammetry by specialists in different fields of science (Deng et al, 2014;Han et al, 2018;Kolecki & Rzonca, 2015;Tokarczyk & Huppert, 2006;Mikoláš et al, 2014).…”