Brompton TESSERA M2, User Manual, Page: 182 / 296

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TESSERA - V3.0 | USER M ANUAL - REV B | 13.1 - BRIGHTNESS
13.1 - BRIGHTNESS
The brightness slider allows adjustm ents for light output on fixtures. As all fixture types are
calibrated when the profile is written, the brightness slider is expressed in Nits (candela/m 2).
This m eans arrays with different fixtures can quickly be set to the sam e output level.
Where m ore than one type of fixture with different m axim um brightness values is used, the
slider has no effect on a fixture's brightness once its m axim um value is exceeded. The
brightness slider will default using the brightest value that all the fixtures in a project can reach.
Exam ple: If a project consists of two different types of fixtures, one of which has a m axim um
output of 5000 Nits and another has a m axim um brightness of 2000 Nits, the default value of
the brightness slider will be 2000 Nits. However, the m axim um value of the slider will be the
value of the brightest fixture in the project, so in this exam ple it would be 5000 Nits.
N OTE To control the brightness of an array including different types of fixtures whilst
m aintaining relative brightness, leave brightness values at default and m odify the
intensity slider.
13.2 - COLOUR TEMPERATURE
The Tem perature slider allows the user to adjust the white balance of attached fixtures in a
range from 2,000-11,000 Kelvin. By default, this value is set to 6,504K. Since Tessera V3.0 the
Colour Tem perature updates in real tim e on the LED panels while the slider is being m oved.
13.3 - GAMMA
Gam m a can be m odified in a range from 0.2 up to 4.0 (default 2.35). Gam m a correction is a way
to adjust the brightness of m id-tones in the im age without affecting the very dark or very bright
areas of the im age. A higher value results in lower brightness overall.
If im ages are not gam m a encoded, they allocate too m any bits or bandwidth to highlights that
hum ans cannot differentiate, too few bits/bandwidth to shadow values that hum ans are
sensitive to, and would require m ore bits/bandwidth to m aintain the sam e visual quality.
By increasing the differential between areas of shadow and light in parts of the lum inance curve
of an im age or video, it is possible to increase details that can be perceived by the hum an eye.
Gam m a correction is done by a sim ple function, im ages are encoded with a gam m a constant
equivalent to about 0.45 and so are decoded with a gam m a of approxim ately 2.2. The gam m a
value in the processor is set by default to 2.35.