Scanner Interface

(g)Threshold: Byte 17

Specifies the threshold value for the line art (Byte 19=’00’

Value (Hex)

 

Brightness

 

 

 

 

00

Default:

 

 

 

without IPC-2 or IPC-2D option

 

 

-

Same as value X’80’.

 

 

with IPC-2 or IPC-2D option

 

 

-

Dynamic threshold, or simplified dynamic

 

 

 

threshold

 

 

 

 

01

Brightest

 

 

 

 

 

 

 

 

 

80

Normal

 

 

 

 

 

 

 

 

FF

Darkest

 

 

 

 

 

(h)Contrast: Byte 18

Specifies the contrast value for the line art or the halftone.

Value (Hex)

Brightness

00

Default: same as value X’80’.

 

 

01

Mostly soft

80Normal

FFMostly sharp

(i)IMAGE COMPOSITION: Byte 19

Value (Hex)

Image output

 

 

00

Line art (Binary image)

 

 

01

Halftone (Binary image)

 

 

02

Gray scale

 

 

03 to FF

(Reserved)

 

 

Appendix A-56