Fotografie digitala si IT
Multiplicative numerical value used to amplify a signal.
Extent to which analog amplifier boosts signal strength, amplification factor, usually expressed in terms of power, i.e. decibel (dB).
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Gain refers to the relationship between the input signal and the output signal of any electronic system. Higher levels of gain amplify the signal, resulting in greater levels of brightness and contrast. Lower levels of gain will darken the image, and soften the contrast. Effectively, gain adjustment affects the sensitivity to light of the CCD or CMOS sensor. In a digital camera, this concept is analogous to the ISO or ASA ratings of silver-halide films.
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