Adobe photoshop elements 用户手册

ADOBE PHOTOSHOP ELEMENTS

darkest parts if you are dragging the black slider. If 
a color channel is selected in the Levels dialog box, 
the black area indicates where none of the given 
color component exists.

Slowly drag the slider to the center of the 

histogram to identify the light or dark areas in the 
image. Use these pixels for targeting the black 
point and white point in your image.

You can adjust the image’s color balance to remove 
unwanted color casts or to correct oversaturated 
or undersaturated colors.

Because there are numerous ways to achieve 
similar results in color balance, it’s useful to 
consider the type of image you have and the effect 
you want to produce. If you’re new to adjusting 

color components, it helps to keep a diagram of 
the color wheel on hand. You can use the color 
wheel to predict how a change in one color 
component affects other colors. 

You can decrease the amount of any color in an 
image by increasing the amount of its opposite on 
the color wheel—and vice versa. Similarly, you can 
increase and decrease a color by adjusting the two 
adjacent colors on the wheel, or even by adjusting 
the two colors adjacent to its opposite. For 
example, in an RGB image you can decrease 
magenta by removing red and blue or by adding 
green. This results in an overall color balance 
containing less magenta.

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