Graphics Programs Reference
In-Depth Information
Equalize
The Equalize command can restore contrast to a washed-out
photo. The command attempts to redistribute pixels so that they
are equally balanced across the entire range of brightness values.
The command works best when you sample a small area that will
drive the overall adjustment. The Equalize command takes the
lightest area and remaps it to
pure white, and takes the dark-
est area and remaps it to pure
black. Let's give it a try.
video 72:
Equalize
1.
Close any open files, and
then open the file Ch10_
Equalize1.tif from the
Chapter 10 folder.
2.
With the Rectangular
Marquee tool, make a
selection inside the largest
cactus branch.
3.
Choose Image > Adjust-
ments > Equalize to repair
the image.
4.
Make sure the Equalize entire image based on selected area
check box is selected, and then click OK.
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What's a LUT?
Historically, LUTs have been used
by the digital cinema industry to
apply color adjustments between
different applications. They work by
building a new table of colors that
completely remap the colors in use.
5.
If the image appears overexposed, you can choose Edit > Fade
to reduce the intensity of the Equalize command.
Color Lookup
A new option for color grading in Photoshop CS6 is the ability to
apply a Color Lookup adjustment layer. The adjustment lets you
choose from several different included presets (organized into
three categories: 3DLUT File, Abstract, and Device Link). Each
method uses a LUT (or lookup table). The benefits of using a LUT
are that color changes are absolute and work well across multiple
images for consistent adjustments.
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Create Your Own LUTs?
In Photoshop CS6, LUTs are meant
to be applied, not created. You
can use an application like Adobe
SpeedGrade to make custom LUTs
or download them from many
websites.
