Christie roadie 25k User Manual page 122

OPERATION
Canceling Brightness Uniformity
If you do not want to use or apply Brightness Uniformity settings, delete the
checkmark from the "Uniformity Enable" checkbox at the top of the Brightness
Uniformity menu.
'
Christie Edge Blending is an innovative set of software functions that can quickly and
Edge Blending
easily blend whitelevels along the edges of multiple adjacent projected images to
create a single seamless larger image.
What is a Blend?
In simple terms, a blend appears as a gradient strip
along an edge of a projected image. It is darkest along
the extreme edge of the image, and lightens nearer to
the rest of the image (see right). This area runs along
the edge of the projector's internal DMDs (display
area); it cannot be located on interior pixels.
Figure 3.40
How Are Blends Used?
In multiple-projector walls,
complementary blends between
neighboring images can
compensate for the extra
"brightness" or intensity where
these edges overlap. By controlling
blend width and other properties,
Figure 3.41. Edge Blending Concept
you can achieve uniformity across
the group of images. Visible
overlaps will disappear as illustrated in Figure 3.41.
For best results, use the same projector model and type throughout your display wall.
In addition, avoid high-gain screens whenever possible—the optical performance of
such screens demands minimal image offset, thus projectors must be located very
close to one another. Not too that the requisite tiling of the image—with data
repeated along internal edges that will overlap—must be correctly done by your
source.
Flat Blends vs. Warped Blends
It is important to remember
FLAT BLENDS:
that the projector's standard edge blending
controls affect the outer edges of the
projector's display panel, and that each blend
is consistent along its length (refer back to
Figure 3.40). The standard Edge Blending
menu controls can blend multiple flat full-
panel displays if they have no keystoning or optional warping applied.
When using the optional ChristieTWIST module for warping
WARPED BLENDS:
images on to curved screens, work with its separate ChristieTWIST PC application to
create more specialized blends required. Such a blend can vary along its length to
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Roadie 25K User's Manual