Callier's Q factor

Callier's Q factor

[′kal‚yāz ′kyü ‚fak·tər]

(graphic arts)

A relationship between the diffuse transmission density of a photographic negative, which measures the total light transmitted, and the specular density, which measures only the light passing directly through.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.