Callier coefficient

Definition: The ratio between the density where measured by parallel or collimated light and where measured by diffuse light. * Ratio of specular and diffuse densities. * Unit: Q or Q-factor. * A value of 1 indicates no scattering at all; the average value of Q is about 1.5.

Previous Term: calibration  Next Term: C-line

Type a photography term below to find its definition: