26 January, 2001 IMAGE PROCESSING
6-25
Detailed
Descriptions
Pale (Low-Density Mode)
Pale achieves image quality comparable with text mode, but of lower contrast. Pale
employs an MTF filter stronger than that employed by the text mode and uses a
darker γ coefficient, thus increasing the incidence of copying textured backgrounds.
Ideal for copying extremely thin originals. Soft employs an MTF filter weaker than
Normal, thus achieving a softer image with less moiré. Sharp employs an MTF filter
stronger than that of Normal, thus increasing the sharpness of lines.
Image Processing Flow Related SP Modes
Scanner Image
Correction
Shading Correction
!
Pre-Entry
Processing
Background Erase SP4-903-68 (Background Erase Level)
!
Smoothing SP4-903-15 (Pre-Filter Coefficient)
!
Magnification Main Scan Direction SP2-909-01 (Main Scan Magnification)
!
Independent Dot Erase SP4-903-63 (Independent Dot Erase Level)
!
Filter
Processing MTF Correction
SP4-903-55 (MTF Filter Coefficient)
SP4-903-56 (MTF Filter Strength)
!
Density Control
γ Coefficient
!
Grayscale
Processing
Dither/Error Diffusion
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