Avision AV121 (FF-0506/FF-0508/FF-0608S) - Manual (Page 30)

Example 2：Scanning a two-sided color document, one
in B&W(Drop Blue Color：Threshold：10, Background：
79), the other in color
Side/Image
Selection
Front
Rear
Image Type Description
Color
Choose Color if you wish to scan a color
image for your original in color.
Gray Choose Gray image if your original contains
actual shades of gray.
B&W Choose B&W if your original contains only text
pencil or ink sketch.
B&W Gray Color
4-6