Ricoh A-C4, Руководство по обслуживанию

Страница: 258 / 497

SERVICE PROGRAM MODE TABLES 20 June 2005
5-24
Scanner: Photo 4553*
These SP codes set the MTF (Modular Transfer Function *
1
) for Photo mode.
Note :
•
As a general rule, adjust the level (coefficient) before adjusting the strength.
•
Raising the brightness or contrast level may increase the occurrence of moiré
4553 1 MTF Filter Level: Main Scan
4553 2 MTF Filter Level: Sub Scan Set the MTF coefficient for main/sub scan
directions.
[0~15/
8 /1]
0: Weakest Å 8: Default Æ 15: Strongest
4553 3 MTF Filter Strength: Main Scan
4553 4 MTF Filter Strength: Sub Scan Set the MTF strength for main/sub scan
directions.
[0~7/
4 /1]
0: Weakest
Å
4: Default
Æ
7: Strongest
4553 5 Smoothing Filter Selects the level of smoothing.
[0~7/
0 /1]
0: Default (Off)
Æ
7: Strongest
4553 6 Brightness (Not Used) Sets the overall brightness of the image.
[1~255/
128 /1]
1: Weakest Å 128: Default Æ 255: Strongest
4553 7 Contrast (Not Used) Sets the overall contrast of the image.
[1~255/
128 /1]
1: Weakest Å 128: Default Æ 255: Strongest
4553 8 Isolated Dot Removal Sets the level of independent dot erasure to
improve the appearance of background.
[0~7/
0 /1]
0: Default (Off) Æ 7: Strongest
*1 When the CCD converts the original image to electrical signals, the contrast is reduced due to
the influence that adjacent white and black pixels have on one another as a result of lens
properties. Typically, you will see very narrow width and spacing between black and white areas.
MTF corrects this problem and emphasizes image detail.