Obogatitev 3D modelov stavb z okni iz podatkov aerolaserskega skeniranja poševnega pogleda in fasadnih tekstur

diplomska naloga

Urša Hribernik (Author), Mojca Kosmatin Fras (Mentor), Dušan Kogoj (Thesis defence commission member), Simona Savšek (Thesis defence commission member), Tomaž Ambrožič (Thesis defence commission member), Sebastian Tuttas (Co-mentor), Uwe Stilla (Co-mentor)

Abstract

Keywords

geodezija;diplomska dela;UNI;ALS poševnega pogleda;fasadne teksture;3D model stavb;koregistracija;zaznava oken;3D kartiranje;

Data

Language:	Slovenian
Year of publishing:	2013
Source:	Ljubljana
Typology:	2.11 - Undergraduate Thesis
Organization:	UL FGG - Faculty of Civil and Geodetic Engineering
Publisher:	[U. Hribernik]
UDC:	528.7:692.23(043.2)
COBISS:	6264673
Views:	2320
Downloads:	518
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Enrichment of a 3D building model with windows using oblique-view als and facade textures
Secondary abstract:	A wide range of applications using 3D building models exists; such as computer games, city marketing, disaster management, tourist information systems, simulations of noise propagation and surveillance of sustainable construction. Complete acquisition of large urban scenes has become feasible using multi-aspect-oblique-view ALS; however, automated generation of detailed 3D models, the main focus of this thesis, still poses a significant challenge. To enable enrichment of a 3D building model with windows, the 3D wire-frame building model and the ALS point cloud are first automatically co-registered. The novel approach to window extraction presented in this thesis exploits evidences about window positions in processed oblique-view ALS point cloud and façade image textures. Laser beam penetrates glassy window areas, and thus points found behind a segmented façade plane, projected onto the façade plane, give reliable evidence about intrusion positions. On the other hand, high values of gradient on a texture are usually due to window frames. These two facts are exploited when extracting initial window patches. Additionally, binary masks, obtained by region growing of homogeneous parts of façade textures, are used to eliminate certain façade artefacts and to improve shape of window patches. The assumption, that many windows of the same kind are on the same floor, is used for the refinement procedure. First, façade textures are divided into horizontal blocks, representing floors. Second, a search for non-similar window patch templates within each block is performed. Third, to obtain additional window patch positions, the chosen templates are cross-correlated along the respective block. Eleven façade planes of an existing 3D wire-frame building model are textured with extracted patches, representing windows and other intrusions. Despite different arrangements of windows, varying window sizes, and relatively strict evaluation method, the method results in 63% detection rate. What is more, the method is mostly data-driven and the detection rate outperforms the method using only oblique-view ALS (Tuttas & Stilla, 2013). The windows are well defined, since the basis for most of window patches are connected components of edges belonging to window frames.
Secondary keywords:	graduation thesis;oblique-view ALS;visible façade textures;3D building model;co-registration;window detection;3D mapping;
File type:	application/pdf
Type (COBISS):	Undergraduate thesis
Thesis comment:	Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo
Pages:	XXIV, 75 str., [5] str. pril.
Keywords (UDC):	mathematics;natural sciences;naravoslovne vede;matematika;astronomy;astrophysics;space research;geodesy;astronomija;astrofizika;raziskovanje vesolja;geodesy;surveying;photogrammetry;remote sensing;cartography;geodezija;pregled terena;fotogrametrija;daljinsko zaznavanje;kartografija;photogrammetry: aerial;terrestrial;aerofotogrametrija;terestrična fotogrametrija;applied sciences;medicine;technology;uporabne znanosti;medicina;tehnika;building (construction) trade;building materials;building practice and procedure;gradbeništvo;gradbeni materiali;gradbene obrti in dela;structural parts and elements of buildings;gradbeni deli in stavbni elementi;
ID:	81127