Avision DS320F (DF-0707S) - Manual (Page 29)

3-13
3.5.6 Color Drop-out
Click the button and a dialog box in below will be displayed. This
dialog allows you to remove one of the R (Red), G (Green), or B
(Blue) color channel. This function is particularly useful when you
need to convert text using OCR software.
Note that this function supports only black & white and gray
image. Therefore, be sure to choose any black & white or gray
image type while applying this function.
The effect on image after removing the G channel
The effect on image after removing the G channel.
The effect on image after removing the R channel.