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- W4377996961 abstract "We introduce an active imaging method to measure scene illumination. The system implementation is divided into four steps. First, the system acquires two images: one is an ordinary image of the scene under ambient light and the other is a corresponding image in which light from the camera flash is added to the scene. Second, the image pair is analyzed to obtain an image that represents the scene as if it had been illuminated by the flash alone. Third, the flash-only image is used to estimate object reflectance functions. Fourth, using the estimated reflectance functions, the ambient illumination spectral power distribution is estimated. We present results that evaluate the method's stability with respect to changes in the mean reflectance function of the scene. Finally, we discuss limitations of the current implementation and alternative implementations." @default.
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- W4377996961 date "2001-01-01" @default.
- W4377996961 modified "2023-10-14" @default.
- W4377996961 title "Illuminating Illumination" @default.
- W4377996961 doi "https://doi.org/10.2352/cic.2001.9.1.art00006" @default.
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