Advanced Processing Capabilities of FCR 2. Gradation Processing In gradation processing, the basic contrast curve (GT) is used as a base from which contrast (GA, GC) and density (GS) can be adjusted as finely as desired. Related parameters are defined below. GRADATION CURVE: GT (similar to an H-D curve. Variable values from A thru P, 16 types.) B-J: Non-linear gradation for systematic modification of shoulders (high-density region) and feet (low-density region). Mid-density regions are set so that at L=2.2 they are nearly equal to the total gamma of a film-screen system. M: Linear gradation with black-white reversal. N: Non-linear gradation, where extreme variations of density (absorbtion) exist. O: Specially optimized non-linear gradation. At L=2.0, resembles film contrast of the film-screen system although with slightly higher contrast than B-J. P: Optimized non-linear gradation mainly for subtle density changes. |
