Gray card
A gray card is a middle gray reference, typically used together with a reflective light meter, as a way to produce consistent image exposure and/or color in video production, film and photography. A gray card is a flat object of a neutral gray color that derives from a flat reflectance spectrum. A typical example is the Kodak R-27 set, which contains one 8x10" card and one 4x5" card which have 18% reflectance across the visible spectrum, and a white reverse side which has 90% reflectance. Note that flat spectral reflectance is a stronger condition than simply appearing neutral; this flatness ensures that the card appears neutral under any illuminant (see metamerism).
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Gray card
A gray card is a middle gray reference, typically used together with a reflective light meter, as a way to produce consistent image exposure and/or color in video production, film and photography. A gray card is a flat object of a neutral gray color that derives from a flat reflectance spectrum. A typical example is the Kodak R-27 set, which contains one 8x10" card and one 4x5" card which have 18% reflectance across the visible spectrum, and a white reverse side which has 90% reflectance. Note that flat spectral reflectance is a stronger condition than simply appearing neutral; this flatness ensures that the card appears neutral under any illuminant (see metamerism).
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A gray card is a middle gray r ...... y illuminant (see metamerism).
@en
Eine Graukarte dient in der Fo ...... Bauart – zwischen 1° und 10°.
@de
O cartão cinza (em inglês, gre ...... preto e de 90% para o branco.
@pt
Una tarjeta de grises es una r ...... uminación (véase metamerismo).
@es
Šedá tabulka (anglicky gray ca ...... ) a 90% na zadní, bílé ploše.
@cs
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1,013,053,097
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A gray card is a middle gray r ...... y illuminant (see metamerism).
@en
Eine Graukarte dient in der Fo ...... e „echte“ Graukarte gemessen.)
@de
O cartão cinza (em inglês, gre ...... preto e de 90% para o branco.
@pt
Una tarjeta de grises es una r ...... . habitaciones sin luz solar).
@es
Šedá tabulka (anglicky gray ca ...... ) a 90% na zadní, bílé ploše.
@cs
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Cartão cinza
@pt
Graukarte
@de
Gray card
@en
Tarjeta de grises
@es
Šedá tabulka
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