Subnode [[@flancian/gray-card]] in node [[gray-card]]
from garden/flancian/gray card.md by @flancian
from garden/flancian/gray card.md by @flancian
Gray Card
- [[pull]] [[grey card]]
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[[go]] https://en.wikipedia.org/wiki/Gray_card
- [[quote]] A primary use of gray cards is to provide a [[standard reference object]] for exposure determination in photography. A gray card is an (approximate) realization of a [[Lambertian]] scatterer; its apparent brightness (and exposure determination) therefore depends only on its orientation relative to the light source.