Single sensor that outputs narrowband multispectral images

Kong, Linghua; Yi, Dingrong; Sprigle, Stephen; Wang, Fengtao; Wang, Chao; Liu, Fuhan; Adibi, Ali; Tummala, Rao

doi:10.1117/1.3277669

Cited by 29 publications

(12 citation statements)

References 6 publications

(7 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One is very specific to some applications, such as in medical imaging [41,42], where a very narrow spectral band of about 10 nm or ratio computed between specific narrow bands are required. In this case, Fig.…”

Section: Filter Considerationsmentioning

confidence: 99%

Energy balance in Spectral Filter Array camera design

Lapray

Thomas

Gouton

et al. 2017

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

View full text Add to dashboard Cite

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.

show abstract

Section: Filter Considerationsmentioning

confidence: 99%

Energy balance in Spectral Filter Array camera design

Lapray

Thomas

Gouton

et al. 2017

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

View full text Add to dashboard Cite

show abstract

“…Various nanophotonic filter techniques have been investigated for multispectral imaging such as nanohole array, nanowire and multilayer film . However, the spatial resolution of image sensor decreases due to the superpixel configuration, where several tens bands, i.e.…”

Section: Other Nanophotonic Issmentioning

confidence: 99%

Nanophotonic Image Sensors

Chen

Wen

et al. 2016

Small

View full text Add to dashboard Cite

The increasing miniaturization and resolution of image sensors bring challenges to conventional optical elements such as spectral filters and polarizers, the properties of which are determined mainly by the materials used, including dye polymers. Recent developments in spectral filtering and optical manipulating techniques based on nanophotonics have opened up the possibility of an alternative method to control light spectrally and spatially. By integrating these technologies into image sensors, it will become possible to achieve high compactness, improved process compatibility, robust stability and tunable functionality. In this Review, recent representative achievements on nanophotonic image sensors are presented and analyzed including image sensors with nanophotonic color filters and polarizers, metamaterial‐based THz image sensors, filter‐free nanowire image sensors and nanostructured‐based multispectral image sensors. This novel combination of cutting edge photonics research and well‐developed commercial products may not only lead to an important application of nanophotonics but also offer great potential for next generation image sensors beyond Moore's Law expectations.

show abstract

“…Different multispectral imaging systems have been devised to encompass this wide range of applications, mainly single point spectrometers with 2D scanning systems [13], digital cameras combined with line-scan spectrographs [12], color filter wheels [14], filter mosaics [15], lenslet arrays and narrowband filters [6,16], and tunable filters of liquid crystal or acousto-optic technology [17,18]. Each of these systems has compromises with regard to operational speed, spectral and spatial resolutions, and cost.…”

Section: Introductionmentioning

confidence: 99%

Portable multispectral imaging system based on light-emitting diodes for spectral recovery from 370 to 1630 nm

2014

View full text Add to dashboard Cite

To expand and investigate the potential of spectral imaging, we developed a portable multispectral system using light-emitting diodes. This system recovers spectral information from the UV to the near IR over a large area using two different image sensors synchronized with 23 bands of illumination. The system was assessed for spectral reconstruction through simulations and experimental measurements by means of two methods of spectral reconstruction and three different evaluation metrics. The results over a Macbeth ColorChecker chart and other samples, including pigments usually employed in art paintings, are compared and discussed. The portable multispectral system using LEDs constitutes a cost-effective and versatile method for spectral imaging.

show abstract

Single sensor that outputs narrowband multispectral images

Abstract: Abstract. We report the work of developing a hand-held ͑or miniaturized͒, low-cost, stand-alone, real-timeoperation, narrow bandwidth multispectral imaging device for the detection of early stage pressure ulcers.

Cited by 29 publications

References 6 publications

Energy balance in Spectral Filter Array camera design

Energy balance in Spectral Filter Array camera design

Nanophotonic Image Sensors

Portable multispectral imaging system based on light-emitting diodes for spectral recovery from 370 to 1630 nm

Contact Info

Product

Resources

About