Avision AV630CS - Manual (Page 27)

4-5
Each image type is described as follows:
Line art
Line art includes only black and white areas.
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 (256 levels gray scale)
Scanner recognizes each point in the image as a
shade of gray (continuous tone). 10-bit gray
gives more detailed information about the image.
True Color (30 bits 16.7 million colors)
The 30 bits True Color provides continuous tones
along with its color hues and gives wider range
of tonal range to present more detailed
information of an image than the 24 bits color.
256 Colors
The 256 colors image provides 256 levels of color
hues.