Graphics Programs Reference
In-Depth Information
Tutorial 4: Enhancing Detail with Levels
This image has a different issue: slight underexposure. Although it's subtle, the image is a bit too dark
(Figure
3-27
).
Figure 3-27.
This image is slightly too dark, hiding some of the detail
The detail in this image is slightly lacking in the darker areas. The middle slider in the Levels dialog box
can correct this, by improving the overall brightness and pulling more detail from the darker areas. This is
called a
gamma
correction.
To correct this image, follow these steps:
Open the image (
Ch3_canyon wall
) found in the Practice Images folder.
1.
2.
Duplicate the background layer (Shift + Control + D) and rename it Gamma
Adjustment (Figure
3-28
).
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