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A-63055 December 1999 24
Binary Mode
Automatic Threshold
Selecting Automatic Threshold automatically sets
Brightness
,
Contrast
,
White Level From Paper
,
Gamma
,
Noise Reduction
, and
Image Emphasis
in accordance with the scanning resolution.
Automatic Threshold
is valid only when a binary mode is specified
in
Mode
.
Select the mode best suited for the application:
• Mode 1—for dark documents.
• Mode 2—for normal documents.
• Mode 3—for light documents.
Halftone Mode
Automatic Separation
When Automatic Separation is enabled, the scanner automatically
recognizes and separates text and photo. This function automatically
sets tonal gradation type. The text is scanned in binary mode and the
photo image areas are scanned in dither mode specified in
Dither
.
Automatic Separation
is valid only when a binary mode is specified
in
Mode
.
Binary mode Error Diffusion Automatic Separation
NOTES: Depending on the document, the text and photograph(s) may
not be perfectly separated.
If photographs are always located in the same positions,
instead of using
Automatic Separation
, you could define a
region and select a dither pattern for that region.