Graphics Reference
In-Depth Information
Fig. 3.18
Then the secondary colors to red, green, and blue are in between them.
Magenta is between red and blue. Cyan is between blue and green. And
yellow is between green and red.
Using the color wheels (sometimes called hue offset wheels ) for each
tonal range while looking at the vectorscope will allow you to “dial in”
the color balance for each tonal range. As we have done in the past, let's
start with the blacks or shadows.
The way to make corrections using these hue offset wheels is to move
the cursor that sits in the center of the wheel in the opposite direction
of the color cast. So, look at the vectorscope and you'll see that the trace
of the vectorscope is in the blue “vector.” In Color's Primary In room,
click on the center of the shadow wheel, which is the one to the left of
the interface. If you have a manual user interface, like a Tangent Devices
WAVE panel, Avid MC Color ( Figure 3.21 ) , or JLCooper Eclipse, these
adjustments would be done with the three trackballs controlling the three
respective color wheels.
So, knowing that the image should be completely free of any color
in the case of the chip chart, the entire trace needs to be exactly in the
middle of the vectorscope. Because it's off toward the blue vector, we can
balance the image by dragging the shadow cursor on the hue offset wheel
toward yellow in the opposite direction of the color cast. Slowly “focus”
or “aim” the trace as closely on the center point of the vectorscope as you
can. Not all of the trace will move because you're trying to balance only
the shadows at the moment.
 
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