Measuring Procedure Luminance measurements shall be made on a diffuse colourless surface with known diffuse reflection factor. 1/ The diffuse colourless surface shall have the dimensions of the registration plate or the dimension exceeding one measuring point.
Les valeurs de luminance sont mesurées sur une surface diffuse incolore dont le coefficient de réflexion diffuse est connu. 1/ La surface diffuse incolore a les mêmes dimensions que la plaque d'immatriculation ou des dimensions ne dépassant celle-ci que d'une unité de mesure au maximum.
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Synonyms and analogies of "diffuse reflection factor" in English