What is it about?
Natural lighting is often a complex mixture from the sun and sky and from nearby surfaces producing shadows and mutual reflections. This work used hyperspectral imaging of rural and urban scenes containing neutral probe spheres to sample the local illumination.
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Why is it important?
Variations in lighting within scenes at any one instant were found to be as great those occuring over the course of the day. Existing models of color processing in cameras and the eye rarely take these variations into account in trying to arrive at a faithful description of surface color ("color constancy").
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This page is a summary of: Spatial distributions of local illumination color in natural scenes, Vision Research, March 2016, Elsevier,
DOI: 10.1016/j.visres.2015.07.005.
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