prikaz prve stranice dokumenta 3D reconstruction system on smartphone
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doctoral thesis
3D reconstruction system on smartphone
Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing, 2017. urn:nbn:hr:168:800879
Lelas, Marko
University of Zagreb
Faculty of Electrical Engineering and Computing
Department of Electronic Systems and Information Processing

Cite this document

Lelas, M. (2017). 3D reconstruction system on smartphone (Doctoral thesis). Retrieved from https://urn.nsk.hr/urn:nbn:hr:168:800879

Lelas, Marko. "3D reconstruction system on smartphone." Doctoral thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, 2017. https://urn.nsk.hr/urn:nbn:hr:168:800879

Lelas, Marko. "3D reconstruction system on smartphone." Doctoral thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, 2017. https://urn.nsk.hr/urn:nbn:hr:168:800879

Lelas, M. (2017). '3D reconstruction system on smartphone', Doctoral thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, accessed 23 October 2020, https://urn.nsk.hr/urn:nbn:hr:168:800879

Lelas M. 3D reconstruction system on smartphone [Doctoral thesis]. Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing; 2017 [cited 2020 October 23] Available at: https://urn.nsk.hr/urn:nbn:hr:168:800879

M. Lelas, "3D reconstruction system on smartphone", Doctoral thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, 2017. Available at: https://urn.nsk.hr/urn:nbn:hr:168:800879

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Metadata
Title3D reconstruction system on smartphone
Title (croatian)Sustav za trodimenzionalnu rekonstrukciju na pametnom telefonu
AuthorMarko Lelas
MentorTomislav Pribanić (mentor)
Committee memberTomislav Pribanić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Electrical Engineering and Computing
(Department of Electronic Systems and Information Processing)
Zagreb
Defense date and country2017, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Computing
Data Processing
Universal decimal classification
(UDC)		654
APPLIED SCIENCES. MEDICINE. TECHNOLOGY
Telecommunication and telecontrol
Abstract
In order to develop a novel 3D reconstruction system on smartphone, this work first gives an analysis of the state of the art active and passive stereo 3D approaches. Drawbacks as well as the advantages of the mentioned approaches are identified and a novel approach to stereo correspondence estimation is presented as a combination of the main ideas of the approaches. In brief, the proposed approach considers image pixel values both in spatial and time domain. That way inherent downsides, common to passive stereo based approaches (problems in reconstructing poorly textured surfaces and surfaces with repetitive patterns) and active stereo based approaches (influence of changing surface albedo on the reconstruction results), are significantly reduced. Secondly, an overview of hardware and software properties of smartphones is presented, pointing out the main requirements and limitations which smartphones as a deployment platform impose on the application. Stereo correspondence estimation methods presented in this work leverage the hardware available on the smartphone (flash, two rear facing cameras) obtaining satisfactory 3D reconstruction results while keeping the requirements on the computational resources as low as possible. Following the novel approach about 3D reconstruction, a novel 3D surface registration method is also presented. It accomplishes an accurate and computationally feasible registration utilizing the measurement data from only two sensors: the accelerometer and magnetometer available on the smartphone. Besides a detailed explanation of the presented methods, an exhaustive evaluation of the proposed ideas is provided too.
Abstract (croatian)
S ciljem razvoja inovativnog sustava za trodimenzionalnu rekonstrukciju na pametnom telefonu, ovim radom dana je analiza trenutnog stanja znanstvenog područja aktivne i pasivne stereo trodimenzionalne rekonstrukcije. Identificirane su prednosti kao i nedostaci pojedinih pristupa te je predstavljen inovativan pristup računanja stereo korespondencije objedinjavajući temeljne ideje navedenih pristupa. Predstavljena metoda analizira slikovne elemente u slikama para stereo kamera i u vremenskoj i u prostornoj domeni. Pokazano je da se takvim pristupom utjecaj inherentnih nedostataka pasivnih stereo pristupa (problemi pri rekonstrukciji slabo teksturiranih površina odnosno površina koje su teksturirane repetitivnim uzorcima) kao i aktivnih stereo pristupa (utjecaj promjena u reflektivnosti rekonstruirane površine na kvalitetu rekonstrukcije) bitno smanjuje. Također, naveden je pregled sklopovskih kao i programskih specifičnosti pametnih telefona ističući bitna ograničenja i zahtjeve koje pametni talefoni kao ciljana platforma nameću aplikacijama. Predstavljena metoda određivanja stereo korespondencije optimalnim korištenjem sklopovskih specifičnosti platforme (led izvor svjetlosti, dvije kamere na stražnjoj strani pametnog telefona, senzori) uspijeva postići zadovoljavajuće rezultate trodimenzionalne rekonstrukcije, pri tome zadržavajući zahtjeve za iskorištavanje računarskih resursa na najnižoj mogućoj razini. Nastavno na predstavljenu metodu trodimenzionalne rekonstrukcije, predstavljena je i inovativna metoda registracije trodimenzionalnih površina koja uspijeva ostvariti registraciju zadovoljavajuće točnosti predstavljajući zahtjeve za računarskim resursima u okvirima ostvarivog na ciljanoj platformi. Smanjenje zahtjeva za računarskim resursima odnosno smanjena kompleksnost metode u odnosu na usporedive metode iz tog područja ostvarena je korištenjem mjernih podataka senzora (akcelerometra i magnetometra) dostupnih na većini pametnih telefona. Uz detaljno objašnjenje predstavljenih metoda, rad također donosi i iscrpnu evaluaciju ostvarenih rezultata.
Keywords
Keywords (english)
Languageenglish
URN:NBNurn:nbn:hr:168:800879
Study programmeTitle: Electrical Engineering and Computing
Study programme type: university
Study level: postgraduate
Academic / professional title: Doktor znanosti elektrotehnike i računarstva (Doktor znanosti elektrotehnike i računarstva)
Type of resourceText
Extent100 str. ; 30 cm.
File originBorn digital
Access conditionsClosed access
Terms of useLicence In copyright icon
RepositoryFER Repository
Created on2019-04-09 14:47:33

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