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Implementation and evaluation of content-aware video retargeting techniques
Linköping University, Department of Electrical Engineering.
2008 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesisAlternative title
Implementation och utvärdering av innehållsstyrd omformatering av videosekvenser (Swedish)
Abstract [en]

The purpose of this master thesis was to study different content-aware video retargeting techniques, concentrating on a generalization of seam carving for video. Focus have also been put on the possibility to combine different techniques to achieve better retargeting of both multi-shot video and single-shot video. This also involved significant studies of automatic cut detection and different measures of video content. The work resulted in a prototype application for semi-automatic video retargeting, developed in Matlab. Three different retargeting techniques, seam carving, automated pan & scan and subsampling using bi-cubic interpolation, have been implemented in the prototype. The techniques have been evaluated and compared to each other from a content preservation perspective and a perceived quality perspective.

Abstract [sv]

Syftet med examensarbetet har varit att studera tekniker för ändring av bredd/höjd-förhållandet i videosekvenser, där hänsyn tas till innehållet i bilderna. Fokus har lagts på en generalisering av "seam carving" för video och möjligheterna att kombinera olika tekniker för att nå bättre kvalitet både för videosekvenser som består av endast ett, eller flera, klipp. Detta innefattade således också omfattande studier av automatisk klippdetektering och olika mått av videoinnehåll. Arbetet har resulterat i en prototypapplikation utvecklad i Matlab för halvautomatisk förändring av bildförhållande där hänsyn tas till innehållet i sekvenserna. I prototypen finns tre metoder implementerade, "seam carving", automatiserad "pan & scan" och nedsampling med bi-kubisk interpolering. Dessa metoder har utvärderats och jämförts med varandra från ett innehållsbevarande perspektiv och ett kvalitetsperspektiv.

Place, publisher, year, edition, pages
2008. , 74 p.
Keyword
seam carving, retargeting, aspect ratio, scaling, saliency, cut, shot, detection, widescreen, fullscreen, processing, optical flow, sampling, pan, scan, energy
National Category
Computer Vision and Robotics (Autonomous Systems) Other Electrical Engineering, Electronic Engineering, Information Engineering Computer Engineering Signal Processing Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-15230ISRN: LiTH-ISY-EX--08/4163--SEOAI: oai:DiVA.org:liu-15230DiVA: diva2:113715
Presentation
2008-09-12, Systemet, Linköpings universitet, Linköping, 13:15 (Swedish)
Uppsok
teknik
Supervisors
Examiners
Available from: 2008-10-27 Created: 2008-10-24 Last updated: 2008-12-28Bibliographically approved

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CiteExportLink to record
Permanent link

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Citation style
  • apa
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