Vpliv pomičnega zaklopa na geometrično distorzijo fotografije : diplomska naloga

Gracar, Anže (author), Kosmatin Fras, Mojca (mentor)

Vse pogostejša uporaba digitalnih fotoaparatov v geodeziji zahteva dobro poznavanje tehnologije nastanka fotografije in morebitnih negativnih vplivov na geometrično popačenje fotografije. Eden takšnih vplivov, ki se ga pogosto ne upošteva, je pomični zaklop. Pri fotoaparatih s pomičnim zaklopom fotografija nastane sekvenčno, zato gibanje platforme (npr. letalnika) ali motiva fotografiranja lahko povzroči dodatna geometrična popačenja na sliki. V tej diplomski nalogi smo najprej na kratko predstavili delovanje digitalnega fotoaparata, predvsem kako delujejo senzorji in zaklopi. Podrobneje je predstavljeno delovanje pomičnega zaklopa in njegov vpliv na geometrijo slike. Razloženo je, kdaj nastane in kako ga lahko minimaliziramo. V praktičnem delu naloge so opisani eksperimenti, s katerimi smo ugotavljali velikost geometričnega popačenja na fotografijah v odvisnosti od hitrosti premikanja objekta. Potrdili smo predpostavko, da je geometrično popačenje pri višji hitrosti večje. Poleg tega smo potrdili, da je bolje uporabiti fotoaparat z mehanskim zaklopom, ki deluje hitreje kot elektronski zaklop, zato je vpliv pomičnega zaklopa na geometrično popačenje manjši.

• Language: Slovenian
• Keywords: pomični zaklop, geometrična distorzija, digitalni fotoaparat, kalibracija fotoaparata
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Publisher: [A. Gracar]
• Year: 2018
• PID: 20.500.12556/RUL-103348
• UDC: 528.7(043.2)
• COBISS.SI-ID: 8535905
• Publication date in RUL: 16.09.2018

GRACAR, Anže, 2018, Vpliv pomičnega zaklopa na geometrično distorzijo fotografije : diplomska naloga [online]. Bachelor’s thesis. A. Gracar. [Accessed 14 April 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=103348

Secondary language

• Language: English
• Title: Impact of the rolling shutter on the geometric distortion of the image : graduation thesis

Abstract

Increasing use of digital cameras in geodesy requires a good knowledge of the technology of how images are captured and possible negative effects on the geometric distortion in the image. One such impact, which is often ignored, is a rolling shutter. In cameras with a rolling shutter, the image is created sequentially, so a movement of the platform (e.g. drone) or the motive can cause additional geometric distortions in the image. In this graduation thesis, we first briefly present the operation of the digital camera, especially how the sensors and shutters work. How a rolling shutter works and its influence on the geometry of the image is presented in more detail. It is explained when the effect of a rolling shutter appears in the image and how we can minimize it. In the practical part of the thesis, we describe experiments made to determine the size of the geometric distortion in the images, depending on the moving speed of the object. We have confirmed the assumption that the geometric distortion at higher speeds is greater. In addition, we have confirmed that it is better to use a camera with a mechanical shutter which works faster than an electronic shutter, so the impact of the rolling shutter on the geometric distortion is lower

• Keywords: rolling shutter, geometric distortion, digital camera, camera calibration