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BKSTS Illustrated Dictionary of Moving Image Technology, 4th Edition by Martin Uren

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G

gaffer: The senior lighting electrician in a film or television studio.

gain: (1) A ratio of amplification or attenuation, usually expressed in decibels. (2) The measure of the reflectivity of a surface compared with a perfect matt white diffusing surface under identical conditions. (3) The measure of the performance of an aerial system compared with a simple dipole.

gamma: (1) A measure of photographic film contrast, the gradient of the straight-line portion of the characteristic curve relating exposure and density. See Figure G.2. (2) In television, the relationship between the original scene ...

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