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Overcoming spatio-angular trade-off in light field acquisition using compressive sensing (CROSBI ID 273910)

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Dlab, Nicol ; Cimermančić, Filip ; Ralašić, Ivan ; Seršić, Damir Overcoming spatio-angular trade-off in light field acquisition using compressive sensing // Automatika : časopis za automatiku, mjerenje, elektroniku, računarstvo i komunikacije, 61 (2020), 2; 250-259. doi: 10.1080/00051144.2020.1715582

Podaci o odgovornosti

Dlab, Nicol ; Cimermančić, Filip ; Ralašić, Ivan ; Seršić, Damir

engleski

Overcoming spatio-angular trade-off in light field acquisition using compressive sensing

In contrast to conventional cameras which capture a 2D projection of a 3D scene by integrating the angular domain, light field cameras preserve the angular information of individual light rays by capturing a 4D light field of a scene. On the one hand, light field photography enables powerful post-capture capabilities such as refocusing, virtual aperture, depth sensing and perspective shift. On the other hand, it has several drawbacks, namely, high-dimensionality of the captured light fields and a fundamental trade-off between spatial and angular resolution in the camera design. In this paper, we propose a compressive sensing approach to light field acquisition from a sub-Nyquist number of samples. Using an off-the- shelf measurement setup consisting of a digital projector and a Lytro Illum light field camera, we demonstrate the efficiency of the compressive sensing approach by improving the spatial resolution of the acquired light field. This paper presents a proof of concept with a simplified 3D scene as the scene of interest. Results obtained by the proposed method show significant improvement in the spatial resolution of the light field as well as preserved post-capture capabilities.

Compressive sensing (CS) ; light field ; camera ; projector ; measurement setup ; sparse optimization

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Podaci o izdanju

61 (2)

2020.

250-259

objavljeno

0005-1144

10.1080/00051144.2020.1715582

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Računarstvo

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