Back to articles
Volume: 3 | Article ID: art00014
Spectral Sensitivity Estimation of Digital Cameras
  DOI :  10.2352/CGIV.2006.3.1.art00014  Published OnlineJanuary 2006

The knowledge of the spectral sensitivity of a colour camera is an essential requirement to calibrate cameras for a variety of illuminants and to parameterise colour constancy algorithms. The presented method estimates the spectral sensitivity by measuring an optimal set of known spectral stimuli. These are spectrally broadband colour samples generated by illumination of Roscolux transmissive filters of which there is a large number available. However, as a smaller set reduces measurement time in a practical setup, we show an approach to select a reduced set of optimal filters by evaluating Lagrange multipliers. We demonstrate practical results using this optimal set in an experimental setup to determine the spectral system sensitivity of a digital colour camera. The advantage of this new setup compared to existing approaches using test charts is its optical geometry using transmissive filters that allow precise measurements. A result of superior quality is achieved by additional optimisations of the measurement conditions. The quality of the measurements is judged by the prediction error using the estimated sensitivity curves for an independent set of colour samples.

Subject Areas :
Views 10
Downloads 0
 articleview.views 10
 articleview.downloads 0
  Cite this article 

Carsten Büttner, Klaus Bobey, Bernd Schlichting1, "Spectral Sensitivity Estimation of Digital Camerasin Proc. IS&T CGIV 2006 3rd European Conf. on Colour in Graphics, Imaging, and Vision,  2006,  pp 70 - 74,

 Copy citation
  Copyright statement 
Copyright © Society for Imaging Science and Technology 2006
Conference on Colour in Graphics, Imaging, and Vision
conf colour graph imag vis
Society of Imaging Science and Technology
7003 Kilworth Lane, Springfield, VA 22151, USA