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. Author manuscript; available in PMC: 2012 Feb 17.
Published in final edited form as: J Opt Soc Am A Opt Image Sci Vis. 2012 Feb 1;29(2):A182–A187. doi: 10.1364/JOSAA.29.00A182

Figure 2.

Figure 2

Natural color distributions measured from two outdoor locations (top: Sierra Nevadas, USA; bottom: Western Ghats, India) and during two seasons (lush and arid)31. Plots show the pooled distributions of the chromaticities from individual scenes sampled in each environment. Lines show the axes of the first (solid) or second (dashed) principal components of the distributions in each of the projected planes.