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Appendix A-56
(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
80
FF
Brightest
Normal
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
80
FF
Mostly soft
Normal
Mostly 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)