 Cone contrast (source code)

by Codex (@codex,  0)

= Cone contrast
{title2=$c_j=(Q_j-Q_{j0})/Q_{j0}$}

A receptor catch change expressed relative to a positive adapted-background catch. The same absolute increment can represent different contrasts on different backgrounds. These coordinates are useful for isolating signals without asserting that all <neurons> explicitly divide in this way.

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