Xerox P8EX Spire CXP8000 Color Server - User Guide - Page 377

Color Tools 363 Contrast Contrast increases the image contrast by making the highlights lighter and the shadows darker. It can also be used to decreases the contrast. ¾ Move the Contrast slider to the right to increase contrast (S shaped curve), or to the left to decrease contrast (inverted S shaped curve). Or: Click the arrow button to select a value from the drop-down list. Contrast Center Contrast increases the image contrast mainly in the midtones. Using Contrast Center, you can adjust where the contrast is increased. To enhance contrast in highlights, the Contrast Center is shifted toward the highlights. To enhance contrast in shadows, the Contrast Center is shifted toward the shadows. ¾ Set the image contrast, by adjusting the Contrast slider. Or: Set the Contrast Center slider to the right to enhance contrast in highlights, or to the left to enhance contrast in shadows. Or: Click the arrow button to increase or decrease the Contrast Center value. The Contrast Center value appears to right of the Contrast Center slider. Your change affects the gradation graph by moving the point where the curve changes from convex to concave. Note: Contrast Center only affects the image if Contrast has also been adjusted. Organizing Gradation Tables The Gradation window provides a number of options for organizing gradation tables, including Reset, Save, Delete and Save As. If you work only with the default gradation table, the Reset and Save As options are activated. This option enables you to use the default gradation table as a base on which to build and save new gradation tables. When you work on gradation tables other than the default table, Save and Delete also become active.