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- Title
Color constancy by characterization of illumination chromaticity.
- Authors
Nikkanen, Jarno
- 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.
- Subjects
DIGITAL image processing; DIGITAL cameras; ALGORITHMS; LIGHTING; OPTICS; OPTICAL engineering
- Publication
Optical Engineering, 2011, Vol 50, Issue 5, p057204
- ISSN
0091-3286
- Publication type
Article
- DOI
10.1117/1.3577621