Generiranje i prikaz modela morskog dna fuzijom telemetrijskih podataka sa podacima višezrakastog sonara

master's thesis

• Title (english): Seabed generation and visualization by fusing telemetry and multibeam sonar data
• Author: Luka Pržić
• Mentor: Nikola Mišković (mentor)
• Committee member: Nikola Mišković (predsjednik povjerenstva)
• Committee member: Đula Nađ (član povjerenstva)
• Committee member: Goran Vasiljević (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2022-02-24, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

Ovaj rad se bavio načinom generiranja mozaika kroz više etapa. U prvoj etapi radilo se o registraciji slike, napravljena je usporedba više različitih načina temeljenim na pronalasku značajki te na faznoj korelaciji Fourierove transformacije. Navedene su njihove mane, prednosti i okolnosti u kojim je njihov princip optimalan. Kako bi registracija mogla biti obavljena uspješno, opisane su razne metode kojima se može obaviti obrada slika, kako bi se, primjerice kod CLAHE metode uspio postići veći lokalni te naposljetku, manji globalni konrast. Također opisana je metoda konstrukcije i primjene maske kojom se umanjuju neželjena svojstva FLS akustičnih slika. Nakon registracije sljedilo je poravnanje svih snimljenih slika pomoću grafa temeljenog na poziciji. U konačnici kada su obavljeni svi prethodno potrebni postupci opisivao se postupak stvaranja mozaika i metode kojima se postiže blaži prijelaz između susjednih slika.

Abstract (english)

The main subject of this thesis was mosaic generation, explained through various stages. First stage explained the concepts of image registration, comparison has been made between a few different methods based on finding the image features and Fourier based phase correlation method. Their flaws and traits have been pointed out, as well as the circumstances which make their use optimal. In order to make image registration successful, various methods of image processing have been described. For example CLAHE algorithm which is used to make locally larger, but in the end globally smaller image contrast. Mask construction method used for removing unwanted FLS image properties was also mentioned as an important part of image processing. After image processing, global image alignment based on Pose graph was described.In the end, when all the other aforementioned procedures have been applied, creation of image mosaic has been explained, along with the methods used to blend neighboring images.

• Keywords: FLS; Registracija slike; Mozaik; Poravnanje slika; Graf temeljen na poziciji
• Keywords (english): FLS; Image registration; Mosaic; Image alignment; Pose based graph
• Language: croatian
• URN:NBN: urn:nbn:hr:168:672430
• Study programme: Title: Electrical Engineering and Information Technology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije (magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2023-01-13 13:35:50