Christie Roadster S+12K User Manual page 110

Operation
Edge Blending 
3-68
Christie Edge Blending is an innovative set of software functions that can quickly and
easily blend the edges of multiple adjacent full screen 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 Figure 3.33). This area runs along the edge of the
projector's internal DMDs (display area); it cannot be located
on interior pixels.
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, you can
achieve uniformity across the
group of images. Visible overlaps will disappear as illustrated in Figure 3.34.
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. Note 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
FLAT BLENDS:
remember 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 3.33).
The standard Edge Blending menu
controls can blend multiple flat full-
panel displays if they have no warping
or keystoning 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
compensate for curves. Once downloaded to the projector, simply apply the desired
custom "user" blend by selecting it in the Blending Enable pull-down list.
Figure 3.34. Edge Blending Concept
(NOTE: TILING DONE AT SOURCE)
Roadster & Mirage S+/HD User Manual
Figure 3.33
020-100002-04 Rev. 1 (12-2008)