Back to articles
Articles
Volume: 28 | Article ID: art00045
Image
Developing a multi-spectral imaging system using a RGB camera under two illuminations
  DOI :  10.2352/issn.2169-2629.2020.28.44  Published OnlineNovember 2020
Abstract

This paper proposes a multi-spectral imaging system, developed using a commercial-grade camera, under two commonly used illumination. Rather than using conventional direct or diffuse light, the novelty of our method is to use a cross-polarized imaging system to eliminate glare and specular highlights. Two RGB images are captured under two different color temperature lighting conditions. An improved reflectance estimation method is developed to transform camera RGB under two illumination to spectral reflectance using a regulated model, combining the polynomial expansion of the camera signals with optimally selected feature. The method was tested using both a semi-gloss ColorChecker SG (140) and matte ColorChecker DC (240) chart. The results indicate that the proposed method significantly outperforms the traditional methods both in terms of spectra and colorimetric accuracy. This new multi-spectral imaging system is sufficiently precise to predict spectra properties and its performance within an acceptable range.

Subject Areas :
Views 23
Downloads 7
 articleview.views 23
 articleview.downloads 7
  Cite this article 

Zhen Liu, Kaida Xiao, Michael Pointer, Changjun Li, "Developing a multi-spectral imaging system using a RGB camera under two illuminationsin Proc. IS&T 28th Color and Imaging Conf.,  2020,  pp 277 - 281,  https://doi.org/10.2352/issn.2169-2629.2020.28.44

 Copy citation
  Copyright statement 
Copyright © Society for Imaging Science and Technology 2020
72010350
Color and Imaging Conference
color imaging conf
2166-9635
Society for Imaging Science and Technology