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.
Sensor Review – Emerald Publishing
Published: Jun 14, 2013
Keywords: Hyperspectral; Video‐rate; Staring; Instantaneous; Imaging; Multiple colour filters; CFA colour filter array; Spectral estimation; Spectra; Colour