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7. Advanced
7.8.5.4
Black level
Overview
•
•
•
7.8.5.4.1
Introduction
Brightness uniformity
In a multi channel system the brightness can vary over the different channels/projectors. The brightness level can be matched using
:
1.
CLO: in this case the light power is matched over the different projectors, see
CLO
in the
Lamps
section
2.
Black level : this will act on the brightness of the “black” color of the image part situated outside the soft edge zones.
Internal black level versus Beta Planes
In the same way as for the soft edge adjustment (Internal vs Alpha planes) this black level adjustment can be
fi
xed
internally
by
using a dialog box or externally by uploading a user de
fi
ned
Beta plane
. This beta plane will contain the values for the brightness
offset
to be applied to the image.
Both methods will allow to compensate for the typical double brightness phenomenon in the soft edge zones by increasing the
brightness of the rest of the image.
channel 1
channel 1
Overlap zone (double brightness)
channel 1&2
pulled up
Image 7-111
Black level : double brightness compensation
It is worth noting however, that (internal) black level (via the dialog box) is to be used for simple linear soft
edge zones (like in the illustration above). Curved soft edge zone should be done using (external) beta planes.
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Summary of Contents for SIM 7D
Page 1: ...Barco SIM 7D User Guide R92112071 R92112072 R92112073 R59770198 10 13 02 2013...
Page 8: ...Table of contents 4 R59770198 BARCO SIM 7D 13 02 2013...
Page 10: ...1 Introduction 6 R59770198 BARCO SIM 7D 13 02 2013...
Page 14: ...2 Packaging 10 R59770198 BARCO SIM 7D 13 02 2013...
Page 39: ...4 Installation Image 4 40 Location of the IR receivers R59770198 BARCO SIM 7D 13 02 2013 35...
Page 40: ...4 Installation 36 R59770198 BARCO SIM 7D 13 02 2013...
Page 54: ...5 Setup 50 R59770198 BARCO SIM 7D 13 02 2013...
Page 80: ...7 Advanced Image 7 41 Image 7 42 Image 7 43 76 R59770198 BARCO SIM 7D 13 02 2013...
Page 108: ...7 Advanced Image 7 95 Image 7 96 Image 7 97 Image 7 98 104 R59770198 BARCO SIM 7D 13 02 2013...
Page 154: ...7 Advanced 150 R59770198 BARCO SIM 7D 13 02 2013...
Page 174: ...B GLD alignment 170 R59770198 BARCO SIM 7D 13 02 2013...
Page 176: ...Glossary 172 R59770198 BARCO SIM 7D 13 02 2013...
Page 182: ...List of tables 178 R59770198 BARCO SIM 7D 13 02 2013...