Digital Projection
HIGHlite 660 Series
EDGE BLEND AND BLACK LEVEL UPLIFT
Reference Guide
Ref 37
Rev A November 2012
Edge Blend And Black Level Uplift
The
Edge Blend
setting is used to improve the appearance of multi-projector
displays, by blending overlapping edges to present a seamless image.
When several projectors are used to create a large tiled image, the
overlapping edges may appear brighter than the rest of the image. As it is
not possible for any projector to produce an absolute black, any ‘black’ areas
in the overlapped edges may appear slightly less dark than those in the rest
of the image.
Black Level Uplift
can be used to counteract this effect, by
raising the black level of the rest of the image. The amount of uplift required
will be either x2 or x4, depending on how many images are overlapped, as
shown in the examples on this page.
no uplift
x2 uplift area
x2 uplift area
x2 uplift area
x2 uplift area
x4 uplift area
x4 uplift area
x4 uplift area
x4 uplift area
Four projectors with overlapping edges
Notes
Two projectors sharing one overlapping edge
x2 uplift area
no uplift
x2 uplift area
