Digital Gem - Grain Equalization & Management - Minolta Dimage Scan Software Manual

Digital GEM - Grain Equalization & Management
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.
Original image
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.
Click the Digital-GEM button in the main
window; 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.
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 (p. 30), or with point AF or manual focus.
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.
46 A
DVANCED IMAGE PROCESSING
After Digital GEM processing
Digital-GEM slider
Click the Digital-GEM tab to display
the Digital-GEM window.
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 effect.
Adjust or move the Digital-GEM sample area to select the portion of the image to be
used to evaluate the Digital-GEM correction. Choose a smooth uniform area for the
evaluation; skin or sky are good subjects. Using the mouse, place the pointer on the
sample area frame; the pointer will change to a double arrow. Simply click and drag
the edge of the frame to adjust the area; the maximum size of the sample area
depends on input resolution. By placing the pointer in the center of the frame, the
pointer will changed to a four-pointed arrow. Simply click and drag to move the frame.
With the pointer outside the frame, click and drag to define a new sample area. To
extend the area over the entire image, press the control key (Windows) or command
key (Macintosh) and the A key at the same time.
Click the apply Digital-GEM button to preview the Digital-GEM effect on the sample
area. Every time the Digital-GEM sample area is changed, or the degree of correction
is adjusted, the apply button must be used Digital-GEM button to view the results. The
sample image can be magnified by clicking the fit-to-window button.
Digital-GEM tab
Apply Digital-GEM button
Digital-GEM text box
Digital-GEM
sample area
Prescan display
Click the scan button to save the final
image. To turn off Digital GEM, click
the Digital-GEM button again.
Fit-to-window button
Digital-GEM sample display
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