Graphics Programs Reference
In-Depth Information
The third dimensional control is Red , Green , and Blue . This node provides numer-
ous combinations to arrive at a desired result through the use of these three dimen-
sional controls.
Master, Highlights, Midtones, and Shadows
The tonal information of the image can be divided into Shadows , Midtones , and
Highlights . As shown in the following screenshot, this information can be repres-
ented as a histogram. In this representation, the left-hand values relate to the dark
tones ( Shadows ), the middle values relate to Midtones , and the right-hand values
relate to Highlights .
The Midtones Start and Midtones End sliders of the Color Correction node
provide flexibility to alter the range between Shadows , Midtones , and Highlights
using the luminance of the input image. These sliders don't consider the Red , Green ,
and Blue checkboxes. Controlling the tonal information through the Master attrib-
utes influences the complete range in the histogram curve of the image, thereby af-
fecting the whole image.
This level of control can be extended to individual red ( R ), green ( G ), blue (B) , and
luminance ( L ) channels of the image to gain more precision. The following screen-
shot displays histograms of the individual channels:
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