Avision AV880C - Manual (Page 29)

4-5
4.1 IMAGE TYPE
Select image type through the mode from the screen of Avision
TWAIN user interface for your own purpose. Please see Figure 4-
4 as below:
Figure 4-4 Image Type
Each image type is described as follows:
Line art
Line art displays the image only in black and white.
There are no intermediate shades of gray in between.
Halftone
Halftone simulates different shades of gray by varying
the threshold value of a matrix.
Gray (1024 levels of gray scale internally)
Scanner recognizes each point in the image as a shade
of gray (continuous tone). 10-bit gray gives more
detailed information about the image.