Ricoh SP5 Series Service Manual page 53

IMAGE PROCESSING
Pale Mode
The image processing for pale mode is basically the same as in text mode.
However, the contrast of the original is low. So, to preserve details, a stronger MTF
filter is used. Also, the independent dot erase level is set at a lower level, so that
only the faintest of dots are deleted; this ensures that dotted lines and periods are
not deleted.
With UP Mode (Copy Features – General Features – Original Mode Quality Level),
the user can select 'Soft', 'Normal', 'Sharp', and 'SP Mode Changed'. The settings
of the SP modes indicated with an asterisk ( * ) are not used unless the user
selects 'SP Mode Changed'.
Input
Correction 1
Input
Correction 2
Filtering
Magnification
ID Control
Gradation
Image Processing Path
Auto Shading
Independent Dot Erase
MTF
Main Scan
Magnification
γ Correction
Grayscale Processing
2-28
Related SP Modes
SP4903-031
(Independent Dot Erase Level)
SP4903-018 *
(MTF Filter Coefficient – Pale
Originals)
SP2909-001
(Main Scan Magnification)
June 30, 1998