Graphics Reference
In-Depth Information
Fig. 2.37 Here is the same grayscale image with no color correction, but the Luma Ranges have been edited so that there is much less of
the image that is considered by the software to be midtones. This would be useful if you wanted to make an adjustment that affected only
a very small range of tones in the absolute middle of the picture.
very well lit and you tried to use your highlight control to bring down
the intensity of the window, it might also bring down other highlights in
the rest of the room. If you want to limit your correction to the window
alone, you could use Luma Ranges ( Figures 2.36 and 2.37 ) to define the
highlights of the picture to only include the window values. Then you
could use your midtone and shadow controls to control the rest of the
image.
D e f i n i t i o n
qualify: This term means
that an area of the picture
is specifically isolated for a
correction by any number
of methods. You could qual-
ify something for correction
using its hue, chroma
strength, or tonal value.
You could also qualify an
area of the image using a
window or garbage matte.
For example: “I qualified
the brightest highlights by
making a matte of every-
thing over 90IRE and added
a bit of yellow to them.”
Alternative to Luma Range
Experienced colorists get a lot of this same ability to isolate a very
specific tonal range by creating a matte that qualifies a specific tonal
range ( Figure 2.38 ). Because this type of correction is really defined as a
secondary correction, we'll discuss it further in the next chapter.
 
 
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