HP 6300C HP Scanjet 6300C Scanner PrecisionScan Pro - (English) User Guide - Page 93

Changing the black and white threshold

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Changing the black and white threshold To bring out details in an image with the Black & White Bitmap (raster) output type, decrease the number in the Black & White Threshold field: 1 Scan a picture. 2 From the Tools menu, select B & W Threshold. The Black & White Threshold tool appears. 3 From the Output Type menu, select Black & White Bitmap (raster). The image changes to black and white. 4 Decrease the value in the Black & White Threshold field: s click on the left side of the slider, - or - s drag the slider to the left, - or - s type a lower number in the Black & White Threshold field, then press Tab or Enter, - or - s click the DOWN spin button next to the Black & White Threshold field. The result of the change to the black and white threshold setting can be seen in the preview area. +$%& Image with the Black & White Bitmap (raster) output type Threshold 127 (the default for this image) Threshold 49 The range for the number in the threshold field is set in the Preference Controls tab (see page 53). TIP Try changing the sharpen level to improve the result when you are changing a color or black and white photograph to a Black & White Bitmap (raster) image. È 4 Adjusting images of pictures Book Contents Index È HP PrecisionScan Pro User's Guide 93

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$%&
4
HP
PrecisionScan Pro
User’s Guide
93
Adjusting images of
pictures
Book Contents
Index
Changing the black and white threshold
To bring out details in an image with the
Black & White
Bitmap (raster)
output type, decrease the number in the
Black & White Threshold
field:
1
Scan a picture.
2
From the
Tools
menu, select
B & W Threshold
.
The
Black & White Threshold
tool appears.
3
From the
Output Type
menu, select
Black & White
Bitmap (raster)
.
The image changes to black and white.
4
Decrease the value in the
Black & White Threshold
field:
■
click on the left side of the slider,
– or –
■
drag the slider to the left,
– or –
■
type a lower number in the
Black & White Threshold
field, then press
Tab
or
Enter
,
– or –
■
click the DOWN spin button next to the
Black & White
Threshold
field.
The result of the change to the black and white
threshold setting can be seen in the preview area.
The range for the number in the threshold field is set in
the
Preference Controls
tab (see page
53
).
Threshold 127
Image with the
Black & White Bitmap (raster)
output type
(the default for
Threshold 49
this image)
Try changing the sharpen level to improve the
result when you are changing a color or black and
white photograph to a
Black & White Bitmap (raster)
image.
TIP