3-8
Matrix StIM/SIM Setup Guide
020-100397-02 Rev. 1 (11-2012)
Section 3: Setup
Edge Blending Controls
Use Edge Blending controls to set the precise
width
,
shape
and
midpoint
you need to blend overlapping edges
together smoothly.
NOTE:
For information about advanced blending of complex configurations, for example with spherical
screens, see the
Christie TWIST User Manual (P/N: 020-100143-XX)
included in the user kit.
•
Blend Width
determines how much area is used for blending along an overlapping edge. Slide bar values
represent the number of pixels used for the blend. For example:
• A setting of “8” creates a blended edge 8 pixels wide.
• A setting of “0” signifies no blending.
For best results in most applications, use a blend width of 12-25% (for example with a screen size of
1920 × 1200, 230-480 pixels).
NOTE:
Ranges: 0-960 horizontal, 0-60 vertical.
•
Blend Shape
determines the rate of roll-off across the blend width, i.e. how quickly the white levels across
the blend change from light and dark. Increasing the
Blend Shape
setting accelerates the rate of change at
both extremes so that
less
of the region appears mid-gray. Decreasing the
Blend Shape
setting slows the rate
of change so that
more
of the region appears mid-gray. For most applications, this subtle control is best left
close to 50.
•
Blend Midpoint
determines the white level at the blend midpoint (the point equidistant between the begin-
ning and end of the blend). Increasing the
Blend Midpoint
setting creates a blend that appears brighter than
the rest of the image. Decreasing the
Blend Midpoint
setting creates a blend that is darker than the rest of the
image. A setting of 50 means the midpoint is approximately 50% black—for best results in most applica-
tions, keep fairly close to this default.
•
Show Blending Overlap
turns your defined blend width area to solid gray so that, if needed, simply overlap-
ping the gray bars can seamlessly align two adjacent images. Toggle the
Show Blending Overlap
off to
reactivate the blend effect.
Other Functions
For convenience, the
Edge Blending
submenu also includes related options for enabling a test pattern. Such
functions duplicate those provided elsewhere in the menu system.
Edge Blending Procedure
NOTE:
Before attempting to work with edge blending software functions, align the projectors/images by
correctly overlapping the displays from your intended external source. Match colors and the brightness
uniformity.
IMPORTANT!
For a shared edge, all blend procedures and settings should be identical on both projectors.
1. Start with 2 projectors. Display full white field test pattern from both.
2. In the
Edge Blending
submenu, enable
Edge Blending
by entering a check mark in the top check box.
3. Set the starting points for adjustment:
a. Set all blend widths to 0.
b. Select
More
and set everything in the
Edge Blending
menu to 50.
4. Set the blend width on 1 projector, increase the
Blend Width
for an overlapping edge (for example, if the
projector’s image is on left, its right edge overlaps the adjacent image—adjust
Right Blend Width
). Use
the same setting on the second projector for this shared edge.
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