Graphics Programs Reference
In-Depth Information
This method not only alters the contrast but also changes hue tones. This change
can be nullified by desaturating the black and white levels to zero using the satura-
tion (
S
) slider in the
HSV
mode. The following screenshot shows a change in con-
trast without hue shifting:
Alternatively, the black and white levels can be adjusted directly using the
HSV
or
RGB
mode in the color wheel that pops up when the small colored rectangular re-
gion to the left of
Black Level
or
White Level
is clicked on.
Tip
Grading can be performed on individual red, green, and blue channels by using
the
R
,
G
, and
B
switches on the top left of the RGB Curves node. This method
provides more precision to achieve better grading.
Grading using the Bezier curve
A similar result, that was achieved in the previous technique, can be achieved by
using the Bezier curve. The bottom-left corner (0,0) in the plot is the shadows point.
The top-right corner (1,1) in the plot is the highlights point. All points that lie in
between these two points signify the midtones. The following screenshot demon-
