| Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 13, Number 1, 2017
|
|
|---|---|---|
| Article Number | 1 | |
| Number of page(s) | 13 | |
| DOI | https://doi.org/10.1186/s41476-016-0031-7 | |
| Published online | 19 January 2017 | |
Research
Energy balance in Spectral Filter Array camera design
Université de Bourgogne Franche Comté, LE2I, UMR CNRS 6306, 9 av. Alain Savary, 21000, Dijon, France
Received:
23
November
2016
Accepted:
16
December
2016
Background: Multispectral imaging permits to capture more spectral information on object surface properties than color imaging. This is useful for machine vision applications. Transmittance spectral filter arrays combined with a solid state sensor form an emerging technology used for snapshot acquisition. In spectral filter arrays technology, the sensitivities of the camera have critical consequences, not only on applications, but also in the viability of the system. We discuss how to balance the energy of each channel in single exposure multispectral imaging.
Methods: We propose a methodology to design filters that permits to reach an optimal balance of energy. We apply this method on practical illuminations combined with a Gaussian model of transmittance filters.
Results and discussion: Our results demonstrate that we can optimize energetically the global camera response with few efforts for several cases of illumination environments, for a given sensor and a number of spectral channels. This methodology can be embedded in an application-oriented optimization framework.
Conclusions: This methodology enables achieving a great range of optical design, and it can be embedded in an application-oriented optimization framework.
Key words: Spectral filter arrays / Multispectral imaging / Optical design
© The Author(s) 2017
Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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