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Term: Gray card

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Term: Gray card

Definition:
A gray card is used as a reference point for assisting to determine the exposure of objects in reflected light. Gray cards normally reflect 18% of the light falling on them. Ideally, gray cards are designed to be spectrally neutral and produce a diffuse reflection. Often times the alternate side of a gray card will be white, reflecting 90% of the light falling on it.
Category:
Image
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