scholarly journals Recovery of reflection spectra in a multispectral imaging system with light emitting diodes

2010 ◽  
Vol 18 (22) ◽  
pp. 23394 ◽  
Author(s):  
Laure Fauch ◽  
Ervin Nippolainen ◽  
Victor Teplov ◽  
Alexei A. Kamshilin
Keyword(s):  
Multispectral Imaging ◽  
Light Emitting Diodes ◽  
Imaging System ◽  
Reflection Spectra ◽  
Light Emitting

scholarly journals Multispectral imaging system based on light-emitting diodes for the detection of melanomas and basal cell carcinomas: a pilot study (erratum)

2017 ◽  
Vol 22 (7) ◽  
pp. 079801
Author(s):  
Xana Delpueyo ◽  
Meritxell Vilaseca ◽  
Santiago Royo ◽  
Miguel Ares ◽  
Laura Rey-Barroso ◽  
...  
Keyword(s):  
Pilot Study ◽  
Basal Cell ◽  
Multispectral Imaging ◽  
Light Emitting Diodes ◽  
Imaging System ◽  
Light Emitting ◽  
Basal Cell Carcinomas

scholarly journals Multispectral imaging system based on light-emitting diodes for the detection of melanomas and basal cell carcinomas: a pilot study

2017 ◽  
Vol 22 (6) ◽  
pp. 065006 ◽  
Author(s):  
Xana Delpueyo ◽  
Meritxell Vilaseca ◽  
Santiago Royo ◽  
Miguel Ares ◽  
Laura Rey-Barroso ◽  
...  
Keyword(s):  
Pilot Study ◽  
Basal Cell ◽  
Multispectral Imaging ◽  
Light Emitting Diodes ◽  
Imaging System ◽  
Light Emitting ◽  
Basal Cell Carcinomas

scholarly journals Validation of a gonio-hyperspectral imaging system based on light-emitting diodes for the spectral and colorimetric analysis of automotive coatings

2017 ◽  
Vol 56 (25) ◽  
pp. 7194 ◽  
Author(s):  
Francisco J. Burgos-Fernández ◽  
Meritxell Vilaseca ◽  
Esther Perales ◽  
Elísabet Chorro ◽  
Francisco M. Martínez-Verdú ◽  
...  
Keyword(s):  
Hyperspectral Imaging ◽  
Light Emitting Diodes ◽  
Imaging System ◽  
Colorimetric Analysis ◽  
Light Emitting ◽  
Automotive Coatings

scholarly journals ACTIVE SPECTRAL IMAGING NONDESTRUCTIVE EVALUATION (SINDE) CAMERA

2016 ◽  
Vol 5 (1) ◽  
pp. 121-125 ◽  
Author(s):  
Eli Simova ◽  
Paul A. Rochefort
Keyword(s):  
Nondestructive Evaluation ◽  
Near Infrared ◽  
Multispectral Imaging ◽  
Light Emitting Diodes ◽  
Imaging Technique ◽  
Spectral Imaging ◽  
Video Camera ◽  
Proof Of Concept ◽  
Light Emitting

A proof-of-concept video camera for active spectral imaging nondestructive evaluation has been demonstrated. An active multispectral imaging technique has been implemented in the visible and near infrared by using light emitting diodes with wavelengths spanning from 400 to 970 nm. This shows how the camera can be used in nondestructive evaluation to inspect surfaces and spectrally identify materials and corrosion.

scholarly journals Converting a Common Low-Cost Document Scanner into a Multispectral Scanner

Sensors ◽  
2019 ◽  
Vol 19 (14) ◽  
pp. 3199
Author(s):  
Zohaib Khan ◽  
Faisal Shafait ◽  
Ajmal Mian
Keyword(s):  
Light Source ◽  
Multispectral Imaging ◽  
Light Emitting Diodes ◽  
Light Guide ◽  
Narrow Band ◽  
Low Cost ◽  
Multispectral Images ◽  
Light Emitting ◽  
Questioned Documents ◽  
Bank Notes

Forged documents and counterfeit currency can be better detected with multispectral imaging in multiple color channels instead of the usual red, green and blue. However, multispectral cameras/scanners are expensive. We propose the construction of a low cost scanner designed to capture multispectral images of documents. A standard sheet-feed scanner was modified by disconnecting its internal light source and connecting an external multispectral light source comprising of narrow band light emitting diodes (LED). A document was scanned by illuminating the scanner light guide successively with different LEDs and capturing a scan of the document. The system costs less than a hundred dollars and is portable. It can potentially be used for applications in verification of questioned documents, checks, receipts and bank notes.

scholarly journals Texture Evaluation of Automotive Coatings by Means of a Gonio-Hyperspectral Imaging System Based on Light-Emitting Diodes

Coatings ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 320
Author(s):  
Francisco J. Burgos-Fernández ◽  
Jaume Pujol ◽  
Esther Perales ◽  
Francisco M. Martínez-Verdú ◽  
Meritxell Vilaseca
Keyword(s):  
Hyperspectral Imaging ◽  
Light Emitting Diodes ◽  
Imaging System ◽  
Strong Relationship ◽  
Visible Range ◽  
Infrared Range ◽  
Suitable Alternative ◽  
Light Emitting ◽  
Spatial Features ◽  
Automotive Coatings

Sparkle and graininess are textural effects that appear as intrinsic spatial features of coatings containing goniochromatic pigments, whereas others such as mottling are undesired outcomes. In this study, we present new methods for the evaluation of sparkle, graininess and mottling of automotive coatings through images acquired with a novel gonio-hyperspectral imaging system based on light-emitting diodes with extended spectral sensitivity beyond the visible range (368–1309 nm). A novel analysis of sparkle that considered the amount of sparkling spots was used. Graininess was quantified through a novel statistical descriptor based on the energy descriptor computed from the histogram. A new index was proposed for an enhanced detection of mottling based on the analysis of striping, which was better observed and quantified in the infrared range. Spectral assessments showed a strong relationship with color and spectral reflectance for graininess and mottling. In conclusion, the results showed that these new spatial and spectral methods are a suitable, alternative and potential approach for the assessment of these textural features.

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