Barco DP2K-17BLP, User And Installation Manual

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16. Color calibration
Preparations
1. Setup the ambient light conditions as it should be during the play out of the movie. (e.g. only the stairs and emergency exit
lighting is switched on).
Note: In an optimal setup less than 1% of light from any other source than the light from the projector should illuminate the
screen.
2. Con fi gure the desired aspect ratio: e.g. FLAT or SCOPE (use most common aspect ratio). Do this by activating the correct LENS
fi le.
3. Position the spectrometer perpendicular to the screen and measure in the center of the screen.
4. Start up Communicator and follow the laser white point calibration wizard.
After white point calibration proceed immediately with color gamut calibration.
16.3 Color gamut calibration
Color Gamut
Color Gamut is the entire range of reproducible colors by a particular device such as a projector. The entire range of reproducible
colors are typically de
fi ned so that horizontal and vertical directions describe saturation and luminance changes, respectively. When
a color is "out of gamut," it is not possible to reach that color by the device.
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Image 16-1
Sample Chromaticity Diagram with Color Gamut of target device (1).
Why apply color correction?
During the post-production process of a fi lm, a speci fi c color space is applied. This color space is the Target Color Gamut Data
(TCGD). All movie content operates under that gamut. To ensure that in the cinema theater the
fi lm is projected within the same
color space as intended by the fi lm industry, the color space of the projector has to be corrected accordingly.
What has to be done?
The color coordinates for the projected primary colors must be measured on the screen. The values can be different than those
originally inside the projector due to re
fl ection on the screen or due to the in fl uence of the glass between the projection booth and
the theatre and even the projected colors are different from setup to setup.
These measured color coordinates are references for the projector and will be entered so that the projector knows how its colors
are projected on the screen. This reference measurement (MCGD), together with the delivered gamut
fi le (TCGD) of the fi lm will
introduce a color correction so that the fi lm will be projected with the desired color target.
156 R5906753 DPXK BLP SERIES 20/11/2017