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Affordable simultaneous hyperspectral imaging

Affordable simultaneous hyperspectral imaging Purpose – The aim of the research project which resulted in this work is to achieve a cost‐effective approach for instantaneous hyperspectral imaging. Design/methodology/approach – This paper presents a simulation study and an experimental evaluation of a novel imaging spectroscopy technique, where multi‐channel image data are acquired instantaneously and transformed into spectra by using a statistical modelling approach. A digital colour camera equipped with an additional colour filter array was used to acquire an instantaneous single image that was demosaicked to generate a multi‐channel image. A statistical transformation approach was employed to convert this image into a hyperspectral one. Findings – The feasibility of this method was investigated through extensive simulation and experimental tasks where promising results were obtained. Practical implications – The small size of the initially acquired single instantaneous image makes this approach useful for applications where video‐rate hyperspectral imaging is required. Originality/value – For the first time, a simplified prototype of this novel imaging spectroscopy technique was built and evaluated experimentally. And the results were compared with those of a more ideal simulation study. Recommendations for how to improve the prototype were also suggested as a result of the comparison between the simulation and the prototype evaluation results. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Sensor Review Emerald Publishing

Affordable simultaneous hyperspectral imaging

Sensor Review , Volume 33 (3): 10 – Jun 14, 2013

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Publisher
Emerald Publishing
Copyright
Copyright © 2013 Emerald Group Publishing Limited. All rights reserved.
ISSN
0260-2288
DOI
10.1108/02602281311324717
Publisher site
See Article on Publisher Site

Abstract

Purpose – The aim of the research project which resulted in this work is to achieve a cost‐effective approach for instantaneous hyperspectral imaging. Design/methodology/approach – This paper presents a simulation study and an experimental evaluation of a novel imaging spectroscopy technique, where multi‐channel image data are acquired instantaneously and transformed into spectra by using a statistical modelling approach. A digital colour camera equipped with an additional colour filter array was used to acquire an instantaneous single image that was demosaicked to generate a multi‐channel image. A statistical transformation approach was employed to convert this image into a hyperspectral one. Findings – The feasibility of this method was investigated through extensive simulation and experimental tasks where promising results were obtained. Practical implications – The small size of the initially acquired single instantaneous image makes this approach useful for applications where video‐rate hyperspectral imaging is required. Originality/value – For the first time, a simplified prototype of this novel imaging spectroscopy technique was built and evaluated experimentally. And the results were compared with those of a more ideal simulation study. Recommendations for how to improve the prototype were also suggested as a result of the comparison between the simulation and the prototype evaluation results.

Journal

Sensor ReviewEmerald Publishing

Published: Jun 14, 2013

Keywords: Hyperspectral; Video‐rate; Staring; Instantaneous; Imaging; Multiple colour filters; CFA colour filter array; Spectral estimation; Spectra; Colour

References