Christie DS+5K User Manual page 95

Black Level Blending
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4. : On one projector, increase the Blend Width for an overlapping
SET BLEND WIDTH
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.
5. Re-adjust width (both projectors) until the overly bright band at the midpoint of the
overlapping blends disappears or just changes to very light gray. For the shared
edge, use the same Blend Width setting on each projector. If the "best blend"
appears to be between two settings, choose the wider setting for both projectors.
6. If the blended region appears too dark or light in relation to the rest
CHECK BLEND:
of the image:
•
Increase Blend Midpoint in both projectors to "lighten" the overall blend,
decrease to "darken" the overall blend.
•
Adjust Blend Shape in both projectors to fine-tune change the amount of mid-
gray intensity (as opposed to black/white) in the blend.
7. Repeat with remaining projectors / overlaps.
8. Check completed display wall with the desired external signal.
9. Adjust mechanical alignment if necessary to maintain perfect pixel-on-pixel
alignment over time.
In applications where you are projecting only white or light images, the Blend Width
may be slightly higher—set according to how much overlap you have between
images. Use the following as a guide (examples show overlapping width only—values
for overlapping height will differ):
•
Recommended overlap is 12.5% - 25%
Similar to Edge Blending, Black Level Blending allows you to adjust the black level
hues of multiple adjacent projected images to create one large seamless display. Edge
blending must be enabled in order to use the Black Level Blending features.
Black Level Blending Procedure
NOTES: 1) Adjust white levels before adjusting black levels. 2) The zones in BLB
menu correspond to the Edge Blend zones. If a given Edge Blend zone width is set to 0
(i.e. no blend on that side) then the corresponding BLB zone is disabled. It only
becomes accessible when that Edge Blend zone is active.
1. Start with two projectors. Select the black test pattern for both projectors from the
Geometry and Color submenu.
2. In the Black Level Blending submenu, enable black blending by putting a
checkmark in the checkbox for each projector.
Section 3: Operation
3-67.