FUJITSU Image Scanner fi-4120C - Manual (Page 52)

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2.4 Excluding a Color in the Image (dropout color)
A selected color (primary colors: red, green or blue) can be removed (dropped out) from the
scanned image data.
For example, if the document contains black text in a green frame, you can set the scanner to read
only the text and eliminate (drop out) the green frame.
To set the scanner to drop out a color, change the settings in the [TWAIN Driver] dialogbox before
scanning.
1. Click the [Advance...] button in the [TWAIN Driver] dialog box.
⇒ The [Advance] dialog box appears.