Sunday, September 10, 2006

Color Accuracy

Color accuracy is a constant frustration in photography, and digital and film cameras struggle equally in this regard. The narrow-band off-primary colors flowers have evolved to attract pollinators and discourage predators and freeloaders please the eye but tend to resist depiction as linear combinations of primary colors other than those used by the human eye.

Eyes, color films and digital cameras all sample the spectral content of incoming light using different primary colors, and all make different inferences regarding off-primary inputs. Spiky flower reflection spectra have a way of unmasking the substantial variations in peak and shape found in the tri-stimulus spectral response curves characteristic of
human color receptors
light-sensitive color film dyes
Bayer pattern color filters and other components in a typical digital camera's single-CCD color inference system

When discrepancies appear, we naturally regard the eye's color rendition as the correct one. But short of duplicating the eye's spectral responses in detail, cameras are doomed to render narrow-band off-primary flower colors differently.
More about Color Accuracy here

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