Adobe Fireworks CS3 用户手册
ADOBE FIREWORKS CS3
User Guide
74
To adjust highlights, midtones, and shadows automatically:
1
Select the image.
2
Do one of the following to select Auto Levels:
•
In the Property inspector, click the Add Live Filters button, and then select Adjust Color > Auto Levels from the
Filters pop-up menu.
Filters pop-up menu.
•
Select Filters > Adjust Color > Auto Levels.
Note: Applying a filter from the Filters menu is destructive; that is, it cannot be undone except when Edit > Undo is an
option. To maintain the ability to adjust, turn off, or remove this filter, apply it as a Live Filter, as described in the first
bulleted option in this step. For more information, see “Using Live Filters” on page 147.
option. To maintain the ability to adjust, turn off, or remove this filter, apply it as a Live Filter, as described in the first
bulleted option in this step. For more information, see “Using Live Filters” on page 147.
You can also adjust highlights, midtones, and shadows automatically by clicking the Auto button in the Levels or
Curves dialog box.
Curves dialog box.
Correcting colors using Curves
The Curves feature is similar to the Levels feature but it provides more precise control over the tonal range. Whereas
Levels uses highlights, shadows, and midtones to correct the tonal range, Curves lets you adjust any color along the
tonal range, instead of only three variables, without affecting other colors. For example, you can use Curves to correct
for a color cast caused by lighting conditions.
Levels uses highlights, shadows, and midtones to correct the tonal range, Curves lets you adjust any color along the
tonal range, instead of only three variables, without affecting other colors. For example, you can use Curves to correct
for a color cast caused by lighting conditions.
The grid in the Curves dialog box illustrates two brightness values:
The horizontal axis
represents the original brightness of the pixels, shown in the Input box.
The vertical axis
represents the new brightness values, shown in the Output box.
When you first open the Curves dialog box, the diagonal line indicates that no changes have been made, so the input
and output values are the same for all pixels.
and output values are the same for all pixels.
To adjust a specific point in the tonal range:
1
Select the image.
2
Do one of the following to open the Curves dialog box:
•
In the Property inspector, click the Plus (+) button beside the Filters label, and then select Adjust Color > Curves
from the Filters pop-up menu.
from the Filters pop-up menu.
Note: If the Property inspector is partially minimized, click the Add Filters button instead of the Plus button.
•
Select Filters > Adjust Color > Curves.
Note: Applying a filter from the Filters menu is destructive; that is, it cannot be undone except when Edit > Undo is an
option. To maintain the ability to adjust, turn off, or remove this filter, apply it as a Live Filter, as described in the first
bulleted option in this step. For more information, see “Using Live Filters” on page 147.
option. To maintain the ability to adjust, turn off, or remove this filter, apply it as a Live Filter, as described in the first
bulleted option in this step. For more information, see “Using Live Filters” on page 147.