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Proceedings Paper

Single-snapshot 2D color measurement by plenoptic imaging system
Author(s): Kensuke Masuda; Yuji Yamanaka; Go Maruyama; Sho Nagai; Hideaki Hirai; Lingfei Meng; Ivana Tosic
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Paper Abstract

Plenoptic cameras enable capture of directional light ray information, thus allowing applications such as digital refocusing, depth estimation, or multiband imaging. One of the most common plenoptic camera architectures contains a microlens array at the conventional image plane and a sensor at the back focal plane of the microlens array. We leverage the multiband imaging (MBI) function of this camera and develop a single-snapshot, single-sensor high color fidelity camera. Our camera is based on a plenoptic system with XYZ filters inserted in the pupil plane of the main lens. To achieve high color measurement precision of this system, we perform an end-to-end optimization of the system model that includes light source information, object information, optical system information, plenoptic image processing and color estimation processing. Optimized system characteristics are exploited to build an XYZ plenoptic colorimetric camera prototype that achieves high color measurement precision. We describe an application of our colorimetric camera to color shading evaluation of display and show that it achieves color accuracy of ΔE<0.01.

Paper Details

Date Published: 8 March 2014
PDF: 8 pages
Proc. SPIE 8992, Photonic Instrumentation Engineering, 89920V (8 March 2014); doi: 10.1117/12.2037449
Show Author Affiliations
Kensuke Masuda, Ricoh Co., Ltd. (Japan)
Yuji Yamanaka, Ricoh Co., Ltd. (Japan)
Go Maruyama, Ricoh Co., Ltd. (Japan)
Sho Nagai, Ricoh Co., Ltd. (Japan)
Hideaki Hirai, Ricoh Co., Ltd. (Japan)
Lingfei Meng, Ricoh Innovations, Inc. (United States)
Ivana Tosic, Ricoh Innovations, Inc. (United States)

Published in SPIE Proceedings Vol. 8992:
Photonic Instrumentation Engineering
Yakov G. Soskind; Craig Olson, Editor(s)

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