Internal Black Level; Black Level : Double Brightness Compensation - Barco R9040411 User Manual

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 fixed internally by
using a dialog box or externally by uploading a user defined 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
Image 5-200

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.
The D-drive of the projector can only save 8 MB of compressed data of which approximately 2 MB is used for
image files, geometry files, factory backup data. This means that the total size of Alpha plane and Beta plane
should be less than 6 MB
The Black level adjustment has to be done for all the channels (projectors)
5.9.9.5.2

Internal black level

What can be done ?
Internal black level can be adjusted via the projector's software using a dialog box. The dialog box allows to add an offset to the
black level of the image in the zones outside the soft edge zones. The range goes from 0 to 255.
R59770718 GALAXY NW SERIES 20/06/2013
Overlap zone (double brightness)
channel 1&2
pulled up
channel 1
5. Advanced
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