HP 6300C HP Scanjet 6300C Scanner PrecisionScan Pro - (English) User Guide - Page 94

Set color channel for black and white bitmaps, Eliminating a color from the image

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Set color channel for black and white bitmaps +$%& When you want to save a black and white bitmap of a picture that has been printed or photocopied on colored paper, or want to create a special effect, you can change the color channel used in the final scan. Eliminating a color from the image By changing the color channel setting in the Black & White Threshold tool you can eliminate red, green or blue from the image (see page 95). 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 for the black and white threshold (see page 93). 5 Select a color channel from the Scan using channel list box in the Black & White Threshold tool: s To eliminate all the red in colored line art or from a drawing printed on red or pink paper, choose the Red channel. The red components of each pixel in the image will be mapped to white and green and blue components of each pixel will be mapped to black. s To eliminate all the green in colored line art or from a drawing printed on green paper, choose the Green channel. The green components of each pixel in the image will be mapped to white and red and blue components of each pixel will be mapped to black. s To eliminate all the blue in colored line art or from a drawing printed on blue paper, choose the Blue channel. The blue components of each pixel in the image will be mapped to white and red and green components of each pixel will be mapped to black. TIP The Auto button in the Black & White Threshold tool does not reset the color channel. È 4 Adjusting images of pictures Book Contents Index È HP PrecisionScan Pro User's Guide 94

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$%&
4
HP
PrecisionScan Pro
User’s Guide
94
Adjusting images of
pictures
Book Contents
Index
Set color channel for black and white bitmaps
When you want to save a black and white bitmap of a
picture that has been printed or photocopied on
colored paper, or want to create a special effect, you
can change the color channel used in the final scan.
Eliminating a color from the image
By changing the color channel setting in the
Black &
White Threshold
tool you can eliminate red, green or
blue from the image (see page
95
).
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 for the black and white threshold
(see page
93
).
5
Select a color channel from the
Scan using channel
list
box in the
Black & White Threshold
tool:
■
To eliminate all the red in colored line art or from a
drawing printed on red or pink paper, choose the
Red
channel. The red components of each pixel in the
image will be mapped to white and green and blue
components of each pixel will be mapped to black.
■
To eliminate all the green in colored line art or from a
drawing printed on green paper, choose the
Green
channel. The green components of each pixel in the
image will be mapped to white and red and blue
components of each pixel will be mapped to black.
■
To eliminate all the blue in colored line art or from a
drawing printed on blue paper, choose the
Blue
channel. The blue components of each pixel in the
image will be mapped to white and red and green
components of each pixel will be mapped to black.
The
Auto
button in the
Black & White Threshold
tool
does not reset the color channel.
TIP