Mustek PageExpress 4800 Pro, User Manual, Page: 24 / 58

24
8
(Brightness/
contrast)
Brightness : use the slider to increase or
decrease the value (-127 ~ +127) and to adjust
the image brighter or darker.
example:
Brightness: -50 Brightness: 0
Brightness: +50
Contrast : use the slider to increase or decrease
the value (-127 ~ +127) to adjust the contrast
higher or lower. the bigger the value is to set
t127, the more contrast is between
lighter and darker areas.
example:
contrast: -50 contrast: 0
contrast: +50
NOTE
Brightness/contrast is enabled in “color” and
“Gray” mode only.
9
(B/W conversion
settings)
this function is only available when scanning
in B/W, or multi-color output (B/W) mode. you
can convert the scanned image in black and
white using following method:
Auto Threshold: It finds an adequate threshold
value automatically to obtain a clear image and
remove dark backgrounds from the image.
original After processed
Manual Threshold: you may manually adjust
the threshold value (-127 ~ +127) until you
are satisfied with the result.
Halftone: this provide 5 halftone patterns,
each creates a halftone effect using a pattern
of black and white dots that can represent
darker or lighter color values. check the
Advanced to enable the Edge Refinement
value (-127~+127) if you want to increase or
decrease the edge weight of patterns.
original After processed
scAnnInG procedUres In WIndoWs
(contInUed)