Color constancy by characterization of illumination chromaticity

Jarno Nikkanen

doi:10.1117/1.3577621

1 May 2011 Color constancy by characterization of illumination chromaticity

Jarno Nikkanen

Author Affiliations +

Optical Engineering, Vol. 50, Issue 5, 057204 (May 2011). https://doi.org/10.1117/1.3577621

Abstract

Computational color constancy algorithms play a key role in achieving desired color reproduction in digital cameras. Failure to estimate illumination chromaticity correctly will result in invalid overall colour cast in the image that will be easily detected by human observers. A new algorithm is presented for computational color constancy. Low computational complexity and low memory requirement make the algorithm suitable for resource-limited camera devices, such as consumer digital cameras and camera phones. Operation of the algorithm relies on characterization of the range of possible illumination chromaticities in terms of camera sensor response. The fact that only illumination chromaticity is characterized instead of the full color gamut, for example, increases robustness against variations in sensor characteristics and against failure of diagonal model of illumination change. Multiple databases are used in order to demonstrate the good performance of the algorithm in comparison to the state-of-the-art color constancy algorithms.

©(2011) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Jarno Nikkanen "Color constancy by characterization of illumination chromaticity," Optical Engineering 50(5), 057204 (1 May 2011). https://doi.org/10.1117/1.3577621

Published: 1 May 2011

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