KeyWest Technology MXB-AV Manual page 144

MediaXtreme
The complex geometry example illustrates a projector offset creating a horizontal keystone problem. The application is
further complicated by the wave-shaped screen. Step one would be to offset the keystone using XWarp software by pulling in
the upper and lower left corners. Next, the operator would use the XWarp alignment grid to create a projection warp map.
The map is immediately applied to the output video, effectively "canceling" the geometry of the screen. The gold line in the
upper figure demonstrates how a projected straight line would appear without XWarp—the lower figure demonstrates the
XWarp correction.
Multiple Projectors
Additional parameters in a projection application include the use of multiple projectors to
increase the viewing area and angle or for special effects. Also, content play out usually will
require synchronizing between projectors—this is an expensive problem unless a single multi-
channel playback device is used. The only multi-channel playback devices available with
geometry correction software installed is the Keywest Technology MX series.
Geometry correction with multiple projectors allows for easy mounting—projector placement
can be compensated for by the geometry software. MX-XWarp gives the MX series devices the
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23 Mar 2009
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