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Auteur Ren Ng |
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Titre : Light Field Photography with a Hand-Held Plenoptic Camera Type de document : Rapport Auteurs : Ren Ng, Auteur ; Marc Levoy, Auteur ; Mathieu Brédif , Auteur ; Gene Duval, Auteur ; Mark Horowitz, Auteur ; Pat Hanrahan, Auteur
Editeur : Californie [USA] : Stanford University Année de publication : 2005 Importance : 11 p. Note générale : bibliographie
Computer Science Tech Report, Rapport de recherche 2005-02, number 2005-02 - Apr 2005Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] image numériqueRésumé : (auteur) This paper presents a camera that samples the 4D light field on its sensor in a single photographic exposure. This is achieved by inserting a microlens array between the sensor and main lens, creating a plenoptic camera. Each microlens measures not just the total amount of light deposited at that location, but how much light arrives along each ray. By resorting the measured rays of light to where they would have terminated in slightly different, synthetic cameras, we can compute sharp photographs focused at different depths. We show that a linear increase in the resolution of images under each microlens results in a linear increase in the sharpness of the refocused photographs. This property allows us to extend the depth of field of the camera without reducing the aperture, enabling shorter exposures and lower image noise. Especially in the macrophotography regime, we demonstrate that we can also compute synthetic photographs from a range of different viewpoints. These capabilities argue for a different strategy in designing photographic imaging systems. To the photographer, the plenoptic camera operates exactly like an ordinary hand-held camera. We have used our prototype to take hundreds of light field photographs, and we present examples of portraits, high-speed action and macro close-ups. Numéro de notice : 17771 Affiliation des auteurs : MATIS+Ext (1993-2011) Thématique : IMAGERIE/INFORMATIQUE Nature : Rapport de recherche DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=103486 Documents numériques
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