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  4. Influence of Spectral Sensitivity Functions on color demosaicing
 
conference paper

Influence of Spectral Sensitivity Functions on color demosaicing

Alleysson, David
•
Süsstrunk, Sabine  
•
Marguier, Joanna
2003
Proceedings IS&T/SID 11th Color Imaging Conference
IS&T/SID 11th Color Imaging Conference

Color images acquired through single chip digital cameras using a color filter array (CFA) contain a mixture of luminance and opponent chromatic information that share their representation in the spatial Fourier spectrum. This mixture could result in aliasing if the bandwidths of these signals are too wide and their spectra overlap. In such a case, reconstructing three-color per pixel images without error is impossible. One way to improve the reconstruction is to have sensitivity functions that are highly correlated, reducing the bandwidth of the opponent chromatic components. However, this diminishes the ability to reproduce colors accurately as noise is amplified when converting an image to the final color encoding. In this paper, we are looking for an optimum between accurate image reconstruction through demosaicing and accurate color rendering. We design a camera simulation, first using a hyperspectral model of random color images and a demosaicing algorithm based on frequency selection. We find that there is an optimum and confirm our results using a natural hyperspectral image.

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Type
conference paper
Author(s)
Alleysson, David
Süsstrunk, Sabine  
Marguier, Joanna
Date Issued

2003

Published in
Proceedings IS&T/SID 11th Color Imaging Conference
Volume

11

Start page

351

End page

357

Subjects

IVRG

•

camera spectral sensitivities

•

demosaicing

•

demosaiking

•

CFA

•

hyperspectral imaging

URL

URL

http://www.imaging.org/store/epub.cfm?abstrid=22207
Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
IVRL  
Event nameEvent placeEvent date
IS&T/SID 11th Color Imaging Conference

Scottsdale, AZ

November 2003

Available on Infoscience
May 21, 2005
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/213948
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