Ricoh Aficio 2035e Service Manual page 367

6.5.7 IMAGE PROCESSING STEPS AND RELATED SP MODES
Text Mode
The Text mode achieves quality reproduction of text and sharp lines and ignores
background texture. Processing is conducted with a high resolution MTF filter;
special processing with the γ coefficient prevents background reproduction and
achieves the best reproduction of images with error diffusion. Because the Soft and
Normal settings use a weak MTF filter, the quality of the image is improved with the
elimination of moiré. The Sharp selection uses an MTF filter stronger than that of
the Normal setting, thus increasing the sharpness of lines.
Image Processing Flow
Scanner Image Shading Correction
Correction
Pre-Filter
Background Erase
Processing
Pre-Filter Smoothing
Magnification Main Scan Direction
Independent Dot Erase
Filter Processing
Density Control
Grayscale
Processing
NOTE: An SP code number and name set in bold italic denotes an SSP (Special
Service Program) mode. To access an SSP, enter the SP mode: press and
hold down  on the 10-key pad then "Copy SP" on the touch-screen.
SM
Related SP Modes
!
SP4903 65 (Background Erase Level: Text Mode)
!
SP4903 10 (Pre-Filter: Text)
!
SP2909 1 (Main Scan Magnification)
!
SP4903 60 (Independent Dot Erase: Text Mode)
!
SP4904 20~23 Text (General Quality)
MTF Correction
(!pg 6-32)
!
γ Coefficient
!
Error Diffusion
6-23
IMAGE PROCESSING
B135/B138