Multispectral imaging using compact compound optics

Shogenji, Rui; Kitamura, Yoshiro; Yamada, Kenji; Miyatake, Shigehiro; Tanida, Jun

doi:10.1364/opex.12.001643

Cited by 108 publications

(62 citation statements)

References 6 publications

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“…A new approach to high sensitivity imaging builds upon the standard Bayer mosaic by using panchromatic pixels [4] that collect a significantly larger proportion of incident radiation. Color filter arrays (CFAs) with more than three colors have been proposed to capture multispectral images [5], [6].…”

mentioning

confidence: 99%

Generalized Assorted Pixel Camera: Postcapture Control of Resolution, Dynamic Range, and Spectrum

Yasuma¹,

Mitsunaga²,

Iso³

et al. 2010

IEEE Trans. on Image Process.

911

408

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Abstract-We propose the concept of a generalized assorted pixel (GAP) camera, which enables the user to capture a single image of a scene and, after the fact, control the tradeoff between spatial resolution, dynamic range and spectral detail. The GAP camera uses a complex array (or mosaic) of color filters. A major problem with using such an array is that the captured image is severely under-sampled for at least some of the filter types. This leads to reconstructed images with strong aliasing. We make four contributions in this paper: 1) we present a comprehensive optimization method to arrive at the spatial and spectral layout of the color filter array of a GAP camera. 2) We develop a novel algorithm for reconstructing the under-sampled channels of the image while minimizing aliasing artifacts. 3) We demonstrate how the user can capture a single image and then control the tradeoff of spatial resolution to generate a variety of images, including monochrome, high dynamic range (HDR) monochrome, RGB, HDR RGB, and multispectral images. 4) Finally, the performance of our GAP camera has been verified using extensive simulations that use multispectral images of real world scenes. A large database of these multispectral images has been made available at http://www1.cs.columbia.edu/ CAVE/projects/gap_camera/ for use by the research community.Index Terms-Assorted pixels, color filter array, color reproduction, demosaicing, dynamic range, multispectral imaging, signal to noise ratio, skin detection, sub-micrometer pixels.

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mentioning

confidence: 99%

Generalized Assorted Pixel Camera: Postcapture Control of Resolution, Dynamic Range, and Spectrum

Yasuma¹,

Mitsunaga²,

Iso³

et al. 2010

IEEE Trans. on Image Process.

911

408

View full text Add to dashboard Cite

show abstract

“…This first MAFC implementation of which we are aware is the Fourier transform spectrometer approach by Hirai et al 58 Surprisingly, it was not until 2004 that we found an implementation like that shown in Fig. 8a, by Shogenji et al, 109 after which we find other research groups following the same approach. 110,111 This layout uses an array of lenses coregistered to an array of spectral filters, with the entire set coupled to a monolithic detector array.…”

Section: Multiaperture Filtered Camera (Mafc 1994)mentioning

confidence: 93%

Review of snapshot spectral imaging technologies

2013

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Within the field of spectral imaging, the vast majority of instruments used are scanning devices. Recently, several snapshot spectral imaging systems have become commercially available, providing new functionality for users and opening up the field to a wide array of new applications. A comprehensive survey of the available snapshot technologies is provided, and an attempt has been made to show how the new capabilities of snapshot approaches can be fully utilized. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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“…Multi-spectral imaging [1,2] is an important technology to realize accurate spectral separation and obtain image information of different frequency bands. Combined with digital image processing technology, it can be used in many areas such as high-precision color reconstruction [3][4][5] , biomedical imaging, [6][7][8][9] and so on.…”

Section: Introductionmentioning

confidence: 99%

The fabrication of a multi-spectral lens array and its application in assisting color blindness

Jin

Liu

et al. 2015

International Journal of Optomechatronics

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This article presents a compact multi-spectral lens array and describes its application in assisting color-blindness. The lens array consists of 9 microlens, and each microlens is coated with a different color filter. Thus, it can capture different light bands, including red, orange, yellow, green, cyan, blue, violet, near-infrared, and the entire visible band. First, the fabrication process is described in detail. Second, an imaging system is setup and a color blindness testing card is selected as the sample. By the system, the vision results of normal people and color blindness can be captured simultaneously. Based on the imaging results, it is possible to be used for helping color-blindness to recover normal vision.

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Multispectral imaging using compact compound optics

Cited by 108 publications

References 6 publications

Generalized Assorted Pixel Camera: Postcapture Control of Resolution, Dynamic Range, and Spectrum

Generalized Assorted Pixel Camera: Postcapture Control of Resolution, Dynamic Range, and Spectrum

Review of snapshot spectral imaging technologies

The fabrication of a multi-spectral lens array and its application in assisting color blindness

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