Digital GEM
Digital GEM (Grain Equalization and Management) reduces the effect of grain in color film. Grain is
a sandy texture that can sometimes be seen smooth uniform areas of the image, such as the sky.
Grain is more pronounced in fast film.
Digital GEM cannot be used with traditional black and white films. The Digital-GEM function can be
used with special black and white films that are designed to be developed in a C-41 or equivalent
color process: Kodak Select Black & White 400, Kodak T400CN, and Illford: XP2 Super. These films
should be scanned with the color-negative film-type setting. Results cannot be guarantied with other
types of black and white film.
1
Click the Digital-GEM button
in
the main window.
• The Digital-GEM tab is activated.
• Each time the Digital ROC button is pressed, the
prescan image is deleted and another prescan
needs to be made.
2
Make a prescan of the image to be processed.
• When Digital GEM is used, the prescan also makes the final scan. When the final scan is
made, the image data is simply processed and saved. While the final scan is relatively fast,
the prescans require more time. Because the final scan and prescan are made at the same
time, always preform the prescan with the autofocus-at-scan function active in the
preferences box (see page 34), or with point AF or manual focus (see page 49 - 50).
3
Set the input resolution of the image in the scan-
setting window (see page 74).
• The effect of image grain is related to the input resolution.
4
Click the Digital-GEM tab.
• The Digital-GEM window appears.
5
Adjust the Digital-GEM
slider or enter the Digital-
GEM correction value
directly in the text box to
set the degree of
correction.
• Values from 0 to 100 can be set.
The larger the value, the greater the
correction.
72
Digital-GEM slider
Digital-GEM text box
Apply Digital-GEM button
Digital-GEM sample area
Prescan display
