Estimating Scene and Camera Calibration Illuminants in Color Images

S. Karungaru, M. Fukumi, and N. Akamatsu (Japan)


Scene illuminant, camera calibration, correlated color temperature (CCT).


In all computer vision systems and applications that use color, stability of the colors is very important. However, color is not a physical property of objects and therefore its stability cannot be expected especially under varying scene illumination. If the scene illumination Correlated Color Temperature (CCT) is known then it could help in color correction. We therefore propose a fast method to estimate the scene illuminant assuming one illuminant per scene. Our method uses skin color information and the YIQ color system to derive equations that can be used to estimate the scene and camera calibration illuminants CCTs. We achieved an average error of between 87.8 270.3K depending on the scene/camera illuminant CCT given.

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