IMAGE PROCESSING
31 October 2001
6-14
6.4.2 AUTO BACKGROUND CORRECTION
•
Auto background correction prevents the background of an original from
appearing on copies.
•
The density of the area [A] (the central 75 mm of the main scan) is the peak
white level density.
•
This correction can be used in Photo/Letter, Photo, and Tint modes.
6.4.3 AUTO SHADING
•
Auto shading corrects errors in the signal level for each pixel using the white
plate.
6.4.4 MTF FILTER
•
The MTF filter enhances the desired image qualities.
•
The MTF filter is used in all modes (Letter, Letter/Photo, Photo, and Tint).
•
This model has no SP mode adjustments.
6.4.5 MAIN SCAN ENLARGEMENT/REDUCTION
•
Changing the scanner speed enables reduction and enlargement in the sub-scan
direction.
•
The processing for main-scan enlargement/reduction is the same as in the
previous digital machines
•
The thermal head is 300 dpi, but the CCD is 600 dpi. Therefore, this model
always reduces the amount of scanned data by half before printing.
C238D043.WMF
[A]
Summary of Contents for Gestetner 5428C
Page 1: ...SERVICE MANUAL Machine code C238...
Page 140: ...POINT TO POINT DIAGRAM 31 October 2001 7 2 Location Map C238S500 WMF...
Page 141: ...31 October 2001 POINT TO POINT DIAGRAM 7 3 P to P Section A C238S501 WMF...
Page 142: ...POINT TO POINT DIAGRAM 31 October 2001 7 4 Section B C238S502 WMF...
Page 143: ...31 October 2001 POINT TO POINT DIAGRAM 7 5 P to P Section C C238S503 WMF...
Page 144: ...POINT TO POINT DIAGRAM 31 October 2001 7 6 Section D C238S504 WMF...
Page 145: ...31 October 2001 POINT TO POINT DIAGRAM 7 7 P to P Section E C238S505 WMF...
Page 146: ...POINT TO POINT DIAGRAM 31 October 2001 7 8 Section F C238S506 WMF...
Page 147: ...31 October 2001 POINT TO POINT DIAGRAM 7 9 P to P Section G C238S507 WMF...
Page 148: ...POINT TO POINT DIAGRAM 31 October 2001 7 10 Section H C238S508 WMF...
