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Advanced image processing
Original image
After Digital GEM processing
Digital GEM - Grain Equalization & Management
Set the input resolution of the image in the scan-setting window with
a Job (p 20) or by manually inputting the value (p. 40). The effect of
image grain is related to the input resolution.
Click the Digital-GEM button in the main win-
dow; the Digital-GEM tab is activated. Each
time the Digital GEM button is pressed, the
prescan image is deleted.
Make a prescan of the image to be processed.
Digital GEM cannot be used with traditional silver-halide black and white films. 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, or Ilford XP2 Super, can be processed with the Digital ROC
function. These films should be scanned with the color-negative film-type setting. Results cannot
be guarantied with other types of black and white film.
Digital GEM reduces the effect of grain in color film. Grain is a sandy texture that can sometimes
be seen in smooth uniform areas of the image such as the sky. Grain is more pronounced in fast
film. The results with Digital GEM vary with the film.
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 pre-
form the prescan with the autofocus-at-scan function active in the preferences box (p. 30), or with
point AF or manual focus.
