User Manual

Table Of Contents
Max: The maximum PQ-encoded pixel value, aka maximum picture level, the lightest
pixel in the image.
Avg: The average PQ-encoded pixel value, aka average picture level (APL).
The third are the Primary Trims, which are only editable if you’ve performed an analysis and if
you have a license from Dolby:
Lift/Gamma/Gain: These controls function similarly to the Y-only Lift, Gamma, and Gain
master wheels of the Color Wheels palette, to let you trim the overall contrast levels of
the image.
Saturation Gain: Lets you trim the saturation of the most highly saturated areas within a
scene. Lesser saturated values will be less affected.
Chroma Weight: Darkens saturated parts of the image to preserve colorfulness
in areas of the image that are clipped by smaller gamuts that don’t have enough
headroom for saturation in the highlights.
Tone Detail: Lets you preserve contrast detail in the highlights that might otherwise be
lost when the highlights are mapped to lower dynamic ranges, usually due to clipping.
Increasing Tone Detail Weight increases the amount of highlight detail that’s preserved.
When used, can have the effect of sharpening highlight detail.
Mid Contrast Bias: Affects image contrast in the region around the computed average
picture level. This lets you increase or decrease contrast in the midtones of the image.
Highlight Clipping: Boosts the brighter part of the image to accentuate highlights.
Dragging this slider to the left boosts the highlights, which can add punch to clips with
highlights that have been diminished after trimming.
The Primary Trims controls that are found in the Dolby Vision palette are only enabled once you’ve
authorized your system with a special license, available from Dolby
The fourth set of controls is available via a second palette mode, the Secondary Trims. These
are only editable if you’ve performed an analysis and if you have a license from Dolby.
Secondary Saturations: A set of slider-based vector-style controls (similar to the Hue
vs. Sat curve) lets you adjust the Saturation of Red, Yellow, Green, Cyan, Blue, and
Magenta to help you selectively fine tune the results.
Secondary Hues: Another set of slider based vector-style controls (similar to the
Hue vs. Hue controls) lets you adjust the Hue of Red, Yellow, Green, Cyan, Blue, and
Magenta to help you fine tune the results.
Chapter – 8 HDR Setup andGrading 247