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Detekcija namerno izazvanih promena u sadržaju slike

Detection of intentionally made changes in image content

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2019
Disertacija.pdf (5.301Mb)
IzvestajKomisije21623.pdf (1.168Mb)
Author
Pavlović, Aleksandra S.
Mentor
Reljin, Irini
Committee members
Prokin, Milan
Samčović, Andreja
Šumarac-Pavlović, Dragana
Gavrovska, Ana
Metadata
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Abstract
Digital images and video signals represent the most frequently transmitted contents. Namely, with the development of modern digital cameras and smartphones, the use of multimedia content increases every day. They are used in everyday life, for getting information and also as authenticated proofs or corroboratory evidence in different areas like: forensic studies, law enforcement, journalism and others...
Multifraktalna analiza se pokazala kao dobar alat za analizu postojećih slika, kao i segmentaciju određenih regiona, izdvajanje ivica, uglova slike i slično. Kako kopirani i nalepljeni delovi imaju sličnu strukturu, može se primeniti multifraktalna analiza, koja u osnovi analizira samosličnost. Multifraktalni spektar daje globalni opis slike (ili, opštije, fenomena koji se ispituje). Vrednost Hölder-ovog eksponenta zavisi od položaja u strukturi i opisuje lokalnu regularnost signala. Naime, različiti objekti na slici imaju različite spektre, različite pozicije maksimuma, minimuma, prve nule itd, što se pokazalo kao interesantan skup različitih parametara pomoću kojih se mogu detektovati namerne promene na slikama...
Faculty:
University of Belgrade, School of Electrical Engineering
Date:
19-06-2019
Projects:
  • Performance optimization of energy-efficient computer and communication systems (RS-32023)
  • Integralni i optimizirani proces Testiranja i Održavanja softvera IKS (Informaciono komunkacionih sistema) (RS-13018)
Keywords:
obrada slike / image processing / clustering / image forensics / CMFD (copy-move forgery detection) / multifractal spectrum / Hölder exponent / metaheuristic method / semi-metric / klasterovanje / forenzika slike / CMFD (copy-move forgery detection) / multifraktalni spektar / Hölder-ov eksponent / metaheuristika / semi-metrika
[ Google Scholar ]
URI
http://nardus.mpn.gov.rs/handle/123456789/11748
http://eteze.bg.ac.rs/application/showtheses?thesesId=7123
https://fedorabg.bg.ac.rs/fedora/get/o:20789/bdef:Content/download
http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=51821839

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