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Volume: 5 | Article ID: art00020
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Recovering spectral data from digital prints with an RGB camera using multi-exposure method
Mikko Nuutinen
Pirkko Oittinen
  DOI :  10.2352/CGIV.2010.5.1.art00020  Published Online :  January 2010
Abstract

The spectral data of a surface can be reconstructed from RGB camera response when reflectance spectrum of the surface and radiance spectrum of the light source are smooth enough. One factor that lowers the reconstruction performance of consumer level cameras is limited dynamic range. Details or intensity levels in low and high luminance regions can not be reliably detected from a single image. With multiple exposures it is possible to capture high dynamic range images. The aim of this study was to apply a multi-exposure method for spectral data reconstruction of prints and find how accuracy it is. Our intended application area is printed image digitization for image quality calculations. We measured the intensity levels and recovered spectral data of printed samples by taking two images using different exposure times. Based on the results multi-exposure method improves the accuracy of spectral data reconstruction of print samples compared to traditional methods and is the preferred choice for printed image digitization process.

Journal Title : Conference on Colour in Graphics, Imaging, and Vision
Publisher Name : Society of Imaging Science and Technology
Publisher Location : 7003 Kilworth Lane, Springfield, VA 22151, USA
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 DOI 10.2352/CGIV.2010.5.1.art00020
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Mikko Nuutinen, Pirkko Oittinen, "Recovering spectral data from digital prints with an RGB camera using multi-exposure method"  in Proc. IS&T CGIV 2010/MCS'10 5th European Conf. on Colour in Graphics, Imaging, and Vision 12th Int'l Symp. on Multispectral Colour Science,  2010,  pp 120 - 125,  https://doi.org/10.2352/CGIV.2010.5.1.art00020

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  Copyright statement 
Copyright © Society for Imaging Science and Technology 2010
72010351
Conference on Colour in Graphics, Imaging, and Vision
conf colour graph imag vis
2158-6330
Society of Imaging Science and Technology
7003 Kilworth Lane, Springfield, VA 22151, USA
2158-6330(20100101)2010:1L.120;1-
cgiv_v2010n1/splitsection20.xml
/ist/cgiv/2010/00002010/00000001/art00020
Articles
Recovering spectral data from digital prints with an RGB camera using multi-exposure method
NuutinenMikko
OittinenPirkko
01012010
2010
1
120
125
2010
The spectral data of a surface can be reconstructed from RGB camera response when reflectance spectrum of the surface and radiance spectrum of the light source are smooth enough. One factor that lowers the reconstruction performance of consumer level cameras is limited dynamic range. Details or intensity levels in low and high luminance regions can not be reliably detected from a single image. With multiple exposures it is possible to capture high dynamic range images. The aim of this study was to apply a multi-exposure method for spectral data reconstruction of prints and find how accuracy it is. Our intended application area is printed image digitization for image quality calculations. We measured the intensity levels and recovered spectral data of printed samples by taking two images using different exposure times. Based on the results multi-exposure method improves the accuracy of spectral data reconstruction of print samples compared to traditional methods and is the preferred choice for printed image digitization process.