Adobe photoshop cs2 사용자 설명서

ADOBE PHOTOSHOP CS2 

Choosing an output channel sets the source slider for that channel to 100% and all other channels to 0%. For example, 
choosing Red as the output channel sets the Source Channels sliders to 100% for Red, and to 0% for Green and Blue 
(in an RGB image). 

Drag any source channel’s slider to the left to decrease the channel’s contribution to the output channel or to the 

right to increase it, or enter a value between -200% and +200% in the text box. Using a negative value inverts the 
source channel before adding it to the output channel. 

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. 

You can also save the settings you make in the Channel Mixer dialog box for reuse on other images. 

Selective color correction is a technique used by high-end scanners and separation programs to change the amount 
of process colors in each of the primary color components in an image. You can modify the amount of a process color 
in any primary color selectively—without affecting the other primary colors. For example, you can use selective color 
correction  to  dramatically decrease the  cyan  in  the green  component of an image  while leaving  the cyan in the  blue  
component unaltered. 

Even though Selective Color uses CMYK colors to correct an image, you can use it on RGB images. 

Make sure that the composite channel is selected in the Channels palette. The Selective Color command is 

available only when you’re viewing the composite channel. 

Do one of the following: 

Choose Image > Adjustments > Selective Color. 

Choose Layer > New Adjustment Layer > Selective Color. Click OK in the New Layer dialog box. 

Choose the color you want to adjust from the Colors menu at the top of the dialog box. Color sets consist of the 

primary additive and subtractive colors plus whites, neutrals, and blacks. 

For Method, select an option: 

Changes the existing amount of cyan, magenta, yellow, or black by its percentage of the total. For example, 

if you start with a pixel that is 50% magenta and add 10%, 5% is added to the magenta (10% of 50% = 5%) for a total 
of 55% magenta. (This option cannot adjust pure specular white, which contains no color components.) 

Adjusts the color in absolute values. For example, if you start with a pixel that is 50% magenta and add 

10%, the magenta ink is set to a total of 60%. 

Drag the sliders to increase or decrease the components in the selected color.

You can also save the settings you make in the Selective Color dialog box for reuse on other images.