Справочник Пользователя для Adobe photoshop cs2
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ADOBE PHOTOSHOP CS2
User Guide
The Channel Mixer modifies a targeted (output) color channel using a mix of the existing (source) color channels in
the image. Color channels are grayscale images representing the tonal values of the color components in an image
(RGB or CMYK). When you use the Channel Mixer, you are adding or subtracting grayscale data from a source
channel to the targeted channel. You are not adding or subtracting colors to a specific color component as you do
with the Selective Color command.
the image. Color channels are grayscale images representing the tonal values of the color components in an image
(RGB or CMYK). When you use the Channel Mixer, you are adding or subtracting grayscale data from a source
channel to the targeted channel. You are not adding or subtracting colors to a specific color component as you do
with the Selective Color command.
To create monochrome images from RGB or CMYK images
1
In the Channels palette, select the composite color channel.
2
Do one of the following to open the Channel Mixer dialog box:
•
Choose Image > Adjustments > Channel Mixer.
•
Choose Layer > New Adjustment Layer > Channel Mixer. Click OK in the New Layer dialog box.
3
Select the Monochrome option to set Gray as the output channel. This creates a color image that contains only
gray values.
4
Use the Source Channels sliders to control the amount of detail and contrast in the images you plan to convert to
grayscale.
Before adjusting the percentages of the source channels, view how each source channel affects the monochrome image.
For example, in RGB, view the image with the Red channel set to +100% and the Green and Blue source channels
For example, in RGB, view the image with the Red channel set to +100% and the Green and Blue source channels
set to 0%. Then, view the image with the Green source channel set to +100% and the other two channels set to 0%.
Finally, view the image with Blue source channel set to +100% and the other channels set to 0%. When adjusting the
percentages of the source channels, you often get the best results when the combined values of the source channels add up
to 100%.
Finally, view the image with Blue source channel set to +100% and the other channels set to 0%. When adjusting the
percentages of the source channels, you often get the best results when the combined values of the source channels add up
to 100%.
5
(Optional) If you select and then deselect the Monochrome option, you can modify the blend of each channel
separately, creating a hand-tinted appearance.
Hand-tinted effect created by selecting (left) and deselecting (right) the Monochrome option
6
(Optional) Drag the slider or enter a value for the Constant option. This option adjusts the grayscale value of the
output channel. Negative values add more black, and positive values add more white. A -200% value makes the
output channel completely black, and a +200% value makes the output channel completely white.
output channel completely black, and a +200% value makes the output channel completely white.
To mix color channels
1
In the Channels palette, select the composite color channel.
2
Do one of the following to open the Channel Mixer dialog box:
•
Choose Image > Adjustments > Channel Mixer.
•
Choose Layer > New Adjustment Layer > Channel Mixer. Click OK in the New Layer dialog box.
3
For Output Channel, choose the channel in which to blend one or more existing () channels.