IBM Ricoh ImageReader FB735 - Manual (Page 26)

4.-4
4.1 Image Type
FB7 provides five image types as explain in below:
Line art
Error Diffusion
Halftone
Scanning Source Gray Scale
Color
Scanning Source
Two scanning sources are provided- flatbed as well
as transparency.
Line art
Line art presents the image in black and white only
and there are no intermediate shades of gray in
between.
Halftone
In addition to the black and white display,
Halftone can present the gray shades of a scanned
image by varying the dot (pixel) sizes.
Error Diffusion
While taking up but a minimum storage space,
error diffusion gives good image texture and
excellent image details.