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The Color correction graph
Color Adjust from left to right:
Default; Brightness -25%; Brightness 50%; Contrast
50%; Contrast -75%; Gamma 3.00; Gamma 0.30.
Color Correction
Aura VT 8.10
The Color Correction filter allows you to adjust colors based on brightness regions. There are three
regions:
Highlights, Midtones and Shadows. These are
selected using the tabs at the top of the panel.
Master is a global setting encompassing all regions.
You might think of these as defining where the adjustments will be made.The middle portion of the panel
contains a series of sliders. These add or subtract the
corresponding color component: Temperature,
Magenta, Luminosity, Red, Green, Blue and Alpha
channel.
As you adjust any of the color components, you
will see corresponding color curves appear that
reflect your settings. Note that there is only a red,
green, blue and alpha adjustment curve.
Temperature, Magenta, Luminosity use the appropriate combination of these when adjusted.
Let’s jump down to the graph. The horizontal axis
of the graph corresponds to the original brightness
values of the pixels and the vertical corresponds to
the new brightness values. The default diagonal line
means no pixels have been changed to new values.
Also on the graph, there are three distinct curves
that correspond to the three regions. Essentially, the
curves define what area is affected when you select
one of the regions. The Shadow region corresponds
to the curve that starts in the top-left corner and
descends to the bottom-middle of the graph. The
Highlights region starts at the bottom-middle and
ascends up to the top-right of the graph. The
Midtone curve is overlayed on top and begins in the
lower-left, ascends to the top-middle of the graph
and then ends in the lower-right.
You can redefine the curves by dragging any of
the four white triangles. This not only allows you to
reposition the curves, but also to change their shape.
The shape and position of the curve determines how
the adjusted color parameter is applied to the selected region. Where the curve is high, a greater amount
of change will occur. Where the curve is low, less
change will occur.