Analiza uporabnosti fotogrametrično določenega oblaka točk za izdelavo 3D modela objekta kulturne dediščine : diplomska naloga

Vidmar, Blaž (author), Kosmatin Fras, Mojca (mentor)

V diplomski nalogi obravnavamo večslikovno ujemanje in njegovo primernost za izdelavo 3D modelov objektov kulturne dediščine. Osredotočimo se na dva konkretna primera iz območja današnje Grčije. Določimo metodologijo za zajem in obdelavo podatkov s programskim orodjem PhotoScan. Izdelane 3D modele opišemo z vizualnimi, geometričnimi in topološkimi značilnostmi. Osnovo za geometrično primerjavo predstavljajo oblaki točk laserskega skeniranja. Iz rezultatov primerjav razberemo, da je omenjen postopek primeren za vizualizacijo, osnovne meritve in izdelavo enostavnih načrtov. Postopek slikovnega ujemanja je v primerjavi z metodo laserskega skeniranja cenovno ugodnejši in hitrejši, hkrati pa pridobimo geometrijsko in vizualno primerljive rezultate. Zaradi zgladitev značilnih krivin postopek ni primeren za natančnejše opise obravnavane površine in za določevanje deformacij na objektih. Rezultati kažejo na smotrnost predhodne izvedbe kalibracije fotoaparatov.

• Language: Slovenian
• Keywords: geodezija, diplomska naloga, UNI, lasersko skeniranje, večslikovno ujemanje, bližnjeslikovna fotogrametrija, računalniški vid, kulturna dediščina, arheologija
• Work type: Undergraduate thesis
• Typology: 2.11 - Undergraduate Thesis
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Place of publishing: Ljubljana
• Publisher: [B. Vidmar]
• Year: 2014
• Number of pages: XVIII, 54 str.
• PID: 20.500.12556/RUL-32514
• UDC: 528.715:727(4-13)(043.2)
• COBISS.SI-ID: 6897761
• Publication date in RUL: 10.07.2015

Secondary language

• Language: English
• Title: Suitability analysis of a multi-image method for 3D model reconstruction in cultural heritage domain

Abstract

The graduation thesis evaluates the suitability of multi-image 3D reconstruction method and its applicability in the cultural heritage domain. Case study of two objects from the area of modern Greece is carried out. The optimal work ow for data acquisition and its processing in commercial software PhotoScan is determined. 3D meshes are described with visual, geometrical and topological characteristics. The data produced with laser scanning is the ground truth for geometrical evaluations. Data evaluation results show the suitability of multi-image 3D reconstruction method for visualisation, simple measurements and for production of simple plans. In comparison with laser scanning the proposed method is cheaper and faster while produces geometrically and visually comparable results. Misreconstructed curvatures are detected on produced 3D meshes which are therefore not suitable for precise surface modelling and for deformation analysis. The results suggest the use of precalibrated camera.

• Keywords: graduation thesis, geodesy, laser scanning, multi-view stereo, close-range photogrammetry, computer vision, cultural heritage, archeology