Robot Vision
Real-time tracking of image regions with changes in geometry and illumination
CVPR '96 Proceedings of the 1996 Conference on Computer Vision and Pattern Recognition (CVPR '96)
ICPR '02 Proceedings of the 16 th International Conference on Pattern Recognition (ICPR'02) Volume 1 - Volume 1
Color Illumination Models for Image Matching and Indexing
ICPR '00 Proceedings of the International Conference on Pattern Recognition - Volume 3
Locale-Based Visual Object Retrieval under Illumination Change
ICPR '00 Proceedings of the International Conference on Pattern Recognition - Volume 4
ICCV '98 Proceedings of the Sixth International Conference on Computer Vision
ICPR '04 Proceedings of the Pattern Recognition, 17th International Conference on (ICPR'04) Volume 3 - Volume 03
Global brightness-variation compensation for video coding
IEEE Transactions on Circuits and Systems for Video Technology
Bigbackground-based illumination compensation for surveillance video
Journal on Image and Video Processing - Special issue on advanced video-based surveillance
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Illumination changes and their effects on scene appearance pose serious problems to many computer vision algorithms. In this paper, we present the benefits that a chromaticity-based approach can provide to illumination compensation. We consider three computationally inexpensive illumination models, and demonstrate that customizing these models for chromatically dissimilar regions reduces mean absolute difference (MAD) error by 70% to 80% over computing the models globally for the entire image. We demonstrate that models computed for a given color are somewhat effective for different colors with similar hues (increasing MAD error by a factor of 6), but are ineffective for colors with dissimilar hues (increasing MAD error by a factor of 15). Finally, we find that model choice is less important if the model is customized for chromatically dissimilar regions. Effects of webcamera drivers are considered.