2002, Z Lin, J Wang, KK Ma, Using eigencolor normalization for illumination-invariant color object recognition, in Pattern Recognition:
[…] eigencolor space, which reflects the inherent colors of the object and is more invariant to illumination changes. Experimental results show that our eigencolor […]
2011 Nicolas B. Cowan et al, "Rotational Variability of Earth's Polar Regions: Implications for Detecting Snowball Planets" arXiv
The cloudiness of the mid-latitudes also manifests itself in the form of increased variability at short wavelengths in the polar observations, and as a dominant gray eigencolor in the south polar observation.
2024, G Segal, D Parkinson, S Bartlett, Planetary Complexity Revealed by the Joint Differential Entropy of Eigencolors, The Astronomical Journal:
We propose a measure, the joint differential entropy of eigencolors, for determining the spatial complexity of exoplanets using only spatially unresolved light-curve data.
