Christie Mirage M Series User Manual page 84

Section 3: Operation
BLACK LEVEL BLENDING - S
Eliminates 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. (Edge blending smooths white levels, and if edge blending is not in use, Black
Level Blending is disabled.)
Adjust white levels before adjusting black levels.
NOTES: 1)
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. Edge blending must be enabled in order to use
the Black Level Blending features.
The use of Black Level Blending feature and the use of Christie TWIST module are mutually exclusive. If
Christie TWIST is installed and Black Level Blending is desired:
1. Disable use of warps or 2D Keystone.
2. Enable edge blending; if not enabled.
3. Enable Black Level Blending.
4. Power down the projector then power up again.
Adjustments can now be made to black level controls.
To restore the use of Christie TWIST:
1. Disable black blending.
2. Power cycle the projector.
3. Begin using the Twist controls.
Black Level Blending Procedure
Adjust white levels before adjusting black levels.
NOTES: 1)
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 check box for
each projector.
3. Working with one projector at a time, use the center brightness slide bar to adjust the center brightness
(brightness of the non-blended region) so that the center intensity matches that of the brightest blended
region (the center of all images when blending a 2 x 2 display is the target area).
4. Use the following three color slide bars, Black Red Level, Black Green Level and Black Blue Level, so
the black hue of each projector matches.
5. You can choose which of the next four options, Top, Bottom, Left, Right, to use depending on which edge
of the projector you are working with has been edge blended. The blend width can be adjusted to line up
properly but by default it corresponds to the edge blending setting determined for that edge.
6. The brightness and black hues of the blended region can be adjusted in more detail in case fine-tuning is
needed (may be only necessary for blending a 2 x 2 projector display because of blending differs for the
sides and center).
3-46
UBMENU
Blinders are recommended for fixed
2)
The zones in BLB menu correspond to the Edge
2)
Mirage M Series User Manual
020-100575-02 Rev. 1 (11-2010)