Christie Mirage M Series User Manual page 80

Section 3: Operation
• Adjust corner White Uniformity last—each corner adjustment affects only this quadrant.
• Repeat for each screen.
Step 4: Readjust Color Temperature (level of red/green/blue) in Eight Zones
a. Return to Steps 2a & 2b and, if necessary, fine-tune the zones so that they all still exhibit a single color
temperature.
Cancelling Brightness Uniformity
If you do not want to use or apply Brightness Uniformity settings, delete the checkmark from the Uniformity
Enable check box at the top of the Brightness Uniformity menu.
EDGE BLENDING - S
The Edge Blending submenu provides a range of controls for smoothing together the overlapping bright edges
of multiple adjacent projected images to create a single larger "seamless" image. These controls, which
primarily affect white levels, are typically used in conjunction with mechanical lens blinders (optional), which
are installed on the front of the projector and which primarily affect black levels. Brightness uniformity
adjustment, if desired, should be performed first. The Edge Blend or Grid Test Pattern is useful for the
mechanical setup of the projectors. If necessary, adjust Black Level Blending first with the Black test pattern,
then use the White test pattern to blend the white levels on the blend edges. The final step is to check the
blended image with an external source.There is a centerline (both horizontal and vertical) in the Edge Blending
test pattern. The intersection of these lines is the true center of the projector's display area.
The Show Blending Overlap control enables or disables edge blending overlap. When enabled, this will make
the size of the Edge Blending regions obvious. This control should only be used during setup.
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).
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, Figure 3-35 Edge Blending
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.
Edge blending software controls are located in
the two-page Edge Blending submenu—
access via Configuration menu, then go to the
Geometry and Color menu and select Edge
Blending. The Advanced Edge Blending option opens the second page of the Edge Blending submenu.
3-42
UBMENU
Concept:
Bottom defined by the slope.
NOTE:
F
IGURE
F 3-35 E B
IGURE DGE LENDING
3-34 E B
DGE LENDING
C
ONCEPT
Mirage M Series User Manual
020-100575-02 Rev. 1 (11-2010)