![background image](http://html.mh-extra.com/html/hp/6300c-scanjet-flatbed-scanner/6300c-scanjet-flatbed-scanner_user-manual_155184095.webp)
+$%&
4
HP
PrecisionScan Pro
User’s Guide
95
Adjusting images of
pictures
Book Contents
Index
➮
➮
Examples of changing color channels
Images of a color drawing changed to the
Black & White
Bitmap (raster)
output type are shown with different
color channels and black and white threshold settings
applied in the
Black & White Threshold
tool.
Original with
True Color
output
type
Black & White Bitmap (raster)
output
type applied with
NTSC Gray
color
channel and
automatic
threshold (110)
Red
color channel and
automatic threshold (110)
Green
color channel and
automatic threshold (110)
Blue
color channel and automatic
threshold (110)
Blue
color channel and higher
threshold (173)
The
NTSC Gray
channel in the
Scan using channel
list
box of the
Black & White Threshold
tool converts
color to gray at a ratio of 30% red, 59% green, and
11% blue.
T I P