| Sažetak | U diplomskome radu je izrađen 3D model visoke točnosti crkve sv. Križa u Ninu. Model je rezultat 3D modeliranja prostornih podataka prikupljenih na terenskom istraživanju. Terensko istraživanje i prikupljanje podataka je izvršeno uređajem Faro Focusm 70. Taj uređaj pripada skupini faznih laserskih uređaja (AMCW). Ukupno je napravljeno 13 snimanja s 13 različitih stajališta. Napravljena su 3 snimanja interijera i 10 snimanja eksterijera. Prikupljanje podataka interijera je obavljeno na uređaju podešenom na 1/8 rezolucije sa faktorom kvalitete 4. Snimanje sa prvih 6 stajališta eksterijera napravljeno je na postavkama rezolucije od 1/2 te faktorom kvalitete 2x, te 4 snimanja na postavkama rezolucije od 1/4 te faktorom kvalitete 2x. U obradi podataka su korišteni računalni programi SCENE, MeshLab i CloudCompare. Generirana su dva modela. Prvi koji je nastao u programu SCENE ima niži broj vrhova i stranica, sastoji se od 1 151 879 vrhova i 2 302 994 stranice te tekstura nije dobro generirana. Drugi 3D model je generiran u programu MeshLab s deseterostruko više vrhova i stranica. Novi model se sastoji od 10 272 623 vrha i 20 531 569 stranica. Prije generiranja drugog modela pristupilo se čišćenju i filtriranju podataka. Čišćenjem se oblak točaka čisti od grubih pogrešaka nastalih prilikom prikupljanja podataka i to je napravljeno u računalnom programu CloudCompare. U istom programu je napravljeno i filtriranje podataka. Novi poligonski model je napravljen u računalnom programu MeshLab pomoću Screened Poisson Surface Reconstruction algoritma. Iz ta dva modela je vidljivo da je tehnika terestričkog laserskog skeniranja pogodna za oblikovanje virtualne kulturne baštine te da se usprkos svim ograničenjima s kojima je trenutno suočena prometnula u vodeći oblik prikupljanja podataka o kulturnoj baštini te njezinom očuvanju. |
| Sažetak (engleski) | In this thesis, a high accuracy 3D model of the church of the Holy Cross in the city of Nin has been made. The model is the result of 3D modeling of spatial data collected in field survey. Field survey and data collection was performed with the device Faro Focusm 70. This laser scanner belongs to the group of Amplitude Modulated Continuous Wave (AMCW) systems. In total, 13 scans were made from 13 different stands. 3 interior shots and 10 exterior shots were made. Interior data collection was performed on a device set to 1/8 resolution with a quality factor of 4. Scanning from the first 6 exterior stands was made at a resolution of 1/2 and a quality factor of 2x, and 4 scans at a resolution of 1/4 and a quality factor 2x. Software SCENE, MeshLab and CloudCompare were used in data processing. Two models were generated. The first one created in the SCENE has a lower number of vertices and faces, that model consists of 1,151,879 vertices and 2,302,994 faces, and the texture is not well generated. The second 3D model was generated in MeshLab with ten times the number of vertices and faces.The new model consists of 10,272,623 vertices and 20,531,569 faces. Before generating the second model, the data was cleaned and filtered. By cleaning, the point cloud is cleaned of errors that occurred during data collection, and this was done in the software CloudCompare. Data filtering was done in the same program. The new mesh was created in the software MeshLab using the Screened Poisson Surface Reconstruction algorithm. These two models show that the terrestrial laser scanning technique is suitable for shaping of virtual cultural heritage and that, despite all the limitations it currently faces, it has become the leading form of collecting data on cultural heritage and its preservation. |
