Adjusting The Intensity Of Black - Christie M Series User Manual

• Show Blending Overlap—Turns your defined blend width area to solid grey so that, if
needed, overlapping the grey bars can seamlessly align two adjacent images. Toggle the Show
Blending Overlap off to reactivate the blend effect. Blending Overlap appears as Reserved
when Christie TWIST is installed.
Christie recommends the projector units be the same models and have identical part numbers. 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. For a shared edge, all blend procedures and settings should be identical on both projectors.
1. Starting with two projectors, display a full white field test pattern from both.
2. Select Configuration > Geometry and Color > Edge Blending.
3. Enable Edge Blending.
4. Set starting points for adjustment:
a) Set all blend widths to 0.
b) Select More and set everything in the Edge Blending menu to 50.
5. Set blend width on one 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.
6. Re-adjust the width on both projectors until the overly bright band at the midpoint of the
overlapping blends disappears or changes to very light grey. 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.
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
differs). The recommended overlap is 12.5% - 25%.
7. Check blend if the blended region appears too dark or light in relation to the rest of the image.
a) Increase Blend Midpoint in both projectors to lighten the overall blend, decrease to
darken the overall blend.
b) Adjust Blend Shape in both projectors to fine-tune change the amount of mid-grey
intensity (as opposed to black/white) in the blend.
8. Repeat with remaining projectors with overlaps.
9. Check completed display wall with the desired external signal.
10. If necessary, adjust the mechanical alignment to maintain perfect pixel-on-pixel alignment
over time.

Adjusting the intensity of black

Eliminate the differences between black levels when edge blending multiple projectors.
The Black Level Blending submenu provides many controls to allow the edges of adjacent images to
be smoothly overlapped creating a seamless image. Adjust white levels before adjusting black levels.
Blinders are recommended for fixed installations.
Similar to Edge Blending, Black Level Blending allows you to adjust the black level intensity of
multiple adjacent projected images to create one large seamless display.
Adjust white levels before adjusting black levels. The zones in the Black Level Blending (BLB) menu
correspond to the edge blend zones.
M Series User Guide
020-101948-02 Rev. 1 (08-2018)
Copyright 2018 Christie Digital Systems USA, Inc. All rights reserved.
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Adjusting the image
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