Christie Matrix SIM Setup Manual Download Page 27

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Section 3: Setup

Matrix StIM/SIM Setup Guide

3-7

020-100397-02 Rev. 1 (11-2012)

6. Enable Coarse Adjustment to quickly apply display changes without redrawing the whole image.
7. Use sliders to achieve relative uniformity in the necessary zone.
8. Disable Coarse Adjustment to accurately display changes as you make them.
9. Use sliders for fine adjustment as necessary in the required zones.
10. Adjust overall gain to ensure that overall light output remains well matched from one screen center to the

next.

Cancel Brightness Uniformity

If you do not want to use or apply Brightness Uniformity settings, delete the check mark from the

Uniformity

Enable

check box at the top of the

Brightness Uniformity

menu.

3.2.4 Edge Blending

The

Edge Blending

submenu provides a range of basic 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

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 center line (both horizontal and vertical) in the Edge
Blending test pattern. The intersection of these lines is the true center of the projector 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.
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.

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.

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 disappear. 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