A Practical One-Shot Multispectral Imaging System Using a Single Image Sensor

Monno, Yusuke; Kikuchi, Sunao; Tanaka, Masayuki; Okutomi, Masatoshi

doi:10.1109/tip.2015.2436342

Cited by 137 publications

(99 citation statements)

References 52 publications

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“…This recovering process is referred to as demosaicking. Various filter array patterns and demosaicking methods [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] have been proposed for improving demosaicked image quality. Because the number of non-measured pixels in an MSFA is larger than that in an RGB Bayer color filter array, a more appropriate MSFA pattern and an accurate demosaicking method are required.…”

Section: Introductionmentioning

confidence: 99%

Snapshot multispectral polarization imaging using a photonic crystal filter array

Shinoda¹,

Ohtera²,

Hasegawa³

2018

Opt. Express

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A new filter array and a demosaicking method for snapshot multispectral polarization imaging are proposed in this paper. The proposed filter array is a thin-film wavy multilayer structure regarded as a photonic crystal that can be fabricated using the autocloning method. The multispectral polarization filter array is developed by altering the wave structure of the photonic crystal at each pixel. In addition, we propose a demosaicking method for multispectral polarization images by considering snapshot imaging as a linear model. In the experiments, we evaluated the recovered spectrum error in some color charts and showed various demosaicked images such as multispectral polarization images, specific-band degree of linear polarization images, polarized RGB images, and non-polarized RGB images.

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Section: Introductionmentioning

confidence: 99%

Snapshot multispectral polarization imaging using a photonic crystal filter array

Shinoda¹,

Ohtera²,

Hasegawa³

2018

Opt. Express

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“…Each spatial position of the array captures only one spectral channel similarly to the Bayer filters [4], and the filter transmission characteristics determine the sensor spectral properties. Several realizations of such setup have been shown recently in the literature [5][6][7]. An *Correspondence: pierre-jean.lapray@uha.fr Université de Bourgogne Franche Comté, LE2I, UMR CNRS 6306, 9 av.…”

Section: Introductionmentioning

confidence: 99%

Energy balance in Spectral Filter Array camera design

Lapray

Thomas

Gouton

et al. 2017

J. Eur. Opt. Soc.-Rapid Publ.

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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.

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“…Recent works on optical filters [2,3,4] in parallel to the development of SFA camera prototypes in the visible electromagnetic range [5], in the near infrared (NIR) [6] and in combined visible and NIR [7,8] permitted the commercialization of solutions, e.g., Imec [9], Silios [10], Pixelteq [11]. In addition, several color cameras include custom filter arrays that are in-between CFA and SFA (e.g., [12,13]). Recent applications in medical imaging [14], agriculture and environment [15] have been published.…”

Section: Introductionmentioning

confidence: 99%

High Dynamic Range Spectral Imaging Pipeline For Multispectral Filter Array Cameras

Lapray

Thomas

Gouton

2017

Sensors

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Spectral filter arrays imaging exhibits a strong similarity with color filter arrays. This permits us to embed this technology in practical vision systems with little adaptation of the existing solutions. In this communication, we define an imaging pipeline that permits high dynamic range (HDR)-spectral imaging, which is extended from color filter arrays. We propose an implementation of this pipeline on a prototype sensor and evaluate the quality of our implementation results on real data with objective metrics and visual examples. We demonstrate that we reduce noise, and, in particular we solve the problem of noise generated by the lack of energy balance. Data are provided to the community in an image database for further research.

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A Practical One-Shot Multispectral Imaging System Using a Single Image Sensor

Cited by 137 publications

References 52 publications

Snapshot multispectral polarization imaging using a photonic crystal filter array

Snapshot multispectral polarization imaging using a photonic crystal filter array

Energy balance in Spectral Filter Array camera design

High Dynamic Range Spectral Imaging Pipeline For Multispectral Filter Array Cameras

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