Light-field image acquisition from a conventional camera: design of a four minilens ring device

Stéphane Bazeille; Yvan Maillot; Frédéric Cordier; Cécile Riou; Christophe Cudel

doi:10.1117/1.OE.58.1.015105

22 January 2019 Light-field image acquisition from a conventional camera: design of a four minilens ring device

Stéphane Bazeille, Yvan Maillot, Frédéric Cordier, Cécile Riou, Christophe Cudel

Author Affiliations +

Funded by: Fonds Unique Interministériel

Optical Engineering, Vol. 58, Issue 1, 015105 (January 2019). https://doi.org/10.1117/1.OE.58.1.015105

Abstract

In the past few years, a new type of camera has been emerging on the market: a digital camera capable of capturing both the intensity of the light emanating from a scene and the direction of the light rays. This camera technology called a light-field camera uses an array of lenses placed in front of a single image sensor, or simply, an array of cameras attached together. An optical device is proposed: a four minilens ring that is inserted between the lens and the image sensor of a digital camera. This device prototype is able to convert a regular digital camera into a light-field camera as it makes it possible to record four subaperture images of the scene. It is a compact and cost-effective solution to perform both postcapture refocusing and depth estimation. The minilens ring makes also the plenoptic camera versatile; it is possible to adjust the parameters of the ring so as to reduce or increase the size of the projected image. Together with the proof of concept of this device, we propose a method to estimate the positions of each optical component depending on the observed scene (object size and distance) and the optics parameters. Real-world results are presented to validate our device prototype.

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Stéphane Bazeille, Yvan Maillot, Frédéric Cordier, Cécile Riou, and Christophe Cudel "Light-field image acquisition from a conventional camera: design of a four minilens ring device," Optical Engineering 58(1), 015105 (22 January 2019). https://doi.org/10.1117/1.OE.58.1.015105

Received: 27 September 2018; Accepted: 26 December 2018; Published: 22 January 2019

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