Gerber OMEGA CP Reference Manual page 383

White Threshold slider
When you select an image and choose Generate Decal Cut, the dialog box contains a White
Threshold slider which provides control over which areas of the image are considered "white."
Slide the control toward More to force more colors to be considered "non-white." Slide the
control toward Less to reduce the colors that are considered "non-white." In the following
examples setting the White Threshold toward Less results in a closer cut line (or clipping path)
around the heart as the beige background color is interpreted as "white." In addition, this setting
also creates small cut shapes on the chocolates which will need to be deleted. Setting the White
Threshold to More reduces the extraneous cut lines, but produces a less accurate Decal Cut
around the heart. Setting the White Threshold to yield the best Decal Cut results requires some
experimentation.
Tip: In addition to using the White Threshold, you could edit the background in an image
editing program to be pure white, or manually digitize the cut line using the line, circle, and box
tools.
After generating a Decal Cut you can remove any extraneous cut lines or clipping paths using
Ctrl+click to select individual shapes and delete them. (Extra cut lines created by Decal Cut are
shown as blue shapes in the following illustration.)
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