Luminance

White Luminance

Luminance this control sets the luminance tolerance of the image. Using either the Color or the Luminance tolerance settings to make an image correction is recommended, but not both at the same time. These settings do not influence the main smoothing process controlled by the Details settings.

The sun has luminance of about 1.6 109 cd m2 at noon.

The actual VIR signal contains three sections, the first having 70 percent luminance and the same chrominance as the color burst signal, and the other two having 50 percent and 7.5 percent luminance respectively.

Definition Luminance is defined by the derivative formula_1where formula_2 is the luminance (cd m2), formula_3 is the luminous flux or luminous power (lm), formula_4 is the angle between the surface normal and the specified direction, formula_5 is the area of the surface (m2), and formula_6 is the solid angle (sr).

Contrast is the difference in luminance or color that makes an object (or its representation in an image or display) distinguishable.

The JPEG and PNG image formats are capable of storing 16.7 million colors (equal to 256 luminance values per color channel).

VIR (or Vertical interval reference), widely adopted in the 1980s, attempts to correct some of the color problems with NTSC video by adding studio inserted reference data for luminance and chrominance levels on line 19.

Color this control sets the color tolerance of the image. It is recommended using either the Color or the Luminance tolerance to make image correction, not both at the same time. These settings do not influence the main smoothing process controlled by the Details settings.

Damping this control sets the phase jitter damping adjustment. This value defines how fast the adaptive filter radius reacts to luminance variations. If increased, then edges appear smoother if too high, then blur may occur. If at minimum, then noise and phase jitter at the edges can occur. It can suppress spike noise when increased, and this is the preferred method to remove it.