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1. Oxford Dictionary

   luminance

   • IPA[ˈluːmɪnəns]

   英式

   • n.
     the intensity of light emitted from a surface per unit area in a given direction.；the component of a television signal which carries information on the brightness of the image.

   • noun: luminance

2. • 更多解釋

   luminance

   • IPA[ˈlo͞omənəns]

   美式

   • n.
     the intensity of light emitted from a surface per unit area in a given direction.

   Oxford American Dictionary