Assessing a 35mm Fixed-Lens Sony Alpha-5100 Intrinsic Parameters Prior to, During, and Post UAV Flight Mission

Tjahjadi, Martinus Edwin and Sai, Silvester Sari and Handoko, Fourry (2019) Assessing a 35mm Fixed-Lens Sony Alpha-5100 Intrinsic Parameters Prior to, During, and Post UAV Flight Mission. In: GEODETA 2019 The 1st International Conference on Geodesy, Geomatics, and Land Administration 2019, 24–25 July 2019, Semarang, Indonesia.

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A fixed focal length lens (FFL) camera with on-adjustable focal length is common companions for conducting aerial photography using unmanned aerial vehicles (UAVs) due to its superiority on optical quality and wider maximum aperture, lighter weight and smaller sizes. A wide-angle 35mm FFL Sony a5100 camera had been used extensively in our recent aerial photography campaign using UAV. Since this off-the-self digital camera is categorized into a non-metric one, a stability performance issue in terms of intrinsic parameters raises a considerably attention, particularly on variations of the lens principal distance and principal point's position relative to the camera's CCD/CMOS sensor caused by the engine and other vibrations during flight data acquisitions. A series of calibration bundle adjustment was conducted to determine variations in the principal distances and principal point coordinates before commencing, during, and after accomplishment of the flight missions. This paper demonstrates the computation of the parameters and presents the resulting parameters for three different epochs. It reveals that there are distinct discrepancies of the principal distances and principal point coordinates prior to, during, and after the mission, that peaked around 1.2mm for the principal distance, as well as around 0.4mm and 1.3mm along the x-axis and the y-axis of the principal point coordinates respectively. In contrast, the lens distortions parameters show practically no perturbations in terms of radial, decentering, and affinity distortion terms during the experiments.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: UAV, Non-metric, Camera, fixed-focal length Lens, Calibration
Subjects: Engineering > Geodesy Engineering
Engineering > Industrial Engineering
Divisions: Fakultas Teknologi Industri > Teknik Industri S1
Fakultas teknik Sipil dan Perencanaan > Teknik Geodesi S1
Depositing User: Mr Sayekti Aditya Endra
Date Deposited: 20 Aug 2021 03:11
Last Modified: 24 Aug 2021 02:39

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