21 May, 1999
IMAGE ADJUSTMENT
6-31
Replacement
Adjustment
6.12.4 SCANNER VIDEO PROCESSING PARAMETERS
The tables in the following pages show the video processing parameter settings for
each scanning mode.
One byte of parameters is assigned for each mode (text or halftone), and they all
have the same definitions as follows:
MTF / Edge detection / Edge enhancement
Bit No.
FUNCTION
COMMENTS
0-3
Not used
Do not change the settings.
4
MTF
0: On
1: Off
This bit is for text mode only.
0: Enhances the thickness of thin lines and
dots, but also makes dust more obvious.
1: Thin lines may not reproduce clearly.
5
Edge enhancement
0: Off
1:On
This bit is for halftone mode only.
0: Suitable for photo originals.
1: Suitable for originals with photo and text.
The edges of text become much sharper, but
moire might appear in photo areas.
6
Edge detection
0: On
1: Off
This bit is for halftone mode only.
0: Suitable for most photo originals.
1: The image becomes lighter, and thin lines
become paler.
7
Not used
Do not change the settings.
Mode
Address
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
Text
AID on
800CED(H)
0
1
0
0
0
0
0
0
Halftone
AID off
800CF5(H)
1
0
0
0
1
1
1
1
AID: Auto Image Density
NOTE: Do not change bits in the shaded part of the table.
