The strongest principle of growth lies in human choice.

George Eliot (1819 - 1880)

Correlated double sampling (CDS)

A sampling technique used to achieve higher precision in CCD readout. The sampling circuit is reset to a predetermined reference level and then the actual pixel voltage is sampled in order to find the difference between the two. Using the resulting correlation minimizes read noise, especially in ultra-low-noise cameras. 

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