X-WARP

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The projection of an X-WARP grid is the first step in setting up the program for correction of complex geometric distortions.

Keywest Technology's new X-WARP software option for the MediaXtreme Signage system is a sophisticated, yet easy-to-use, software application that allows users to correct geometric distortions introduced when projectors are placed at extreme angles beyond the range of built-in keystone correction, in unusual positions or used to project onto non-flat surfaces.

3D Shapes

X-WARP can be used to correct geometric distortions so images perfectly match the three-dimensional shape upon which they are being projected without having to adjust the projector that’s in use.

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X-WARP's easy-to-use interface adjusts a projected X-WARP mesh.

With X-WARP, users can map a two-dimensional projected image onto a 3-D surface by adjusting the X-WARP mesh to match the x, y and z coordinates of a three-dimensional surface.

Align Projectors

When multiple projectors are used, X-WARP provides an easy, time-saving method to perfectly align the images from each projector.

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Above, four projectors for four screens aligned edge to edge in a landscape fashion are used as rear projectors to create one continuous image along a hallway. Unfortunately, each introduces its own geometric distortion based on its position relative to its screen. Aligning the images from each projector is extremely difficult at best and perhaps impossible, so the goal of creating a continuous horizontal image may not be possible.

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Above, images from the four projectors are easily and quickly aligned with Keywest Technology's X-WARP. During setup, the projected X-WARP grid pattern from each projector and the application's easy-to-use interface allow the corners of each projected image to be matched while X-WARP's geometric distortion correction algorithms compensate for any distortion, effectively removing it.

In the example above, a single MediaXtreme media server with a four-channel output configuration option runs four channels of X-WARP to correct the severe geometric distortion from each projector and accomplish the goal of creating a continuous four-screen landscape image running the length of the hypothetical hallway.

Curved Surfaces

X-WARP can correct geometric distortions caused by projecting a flat image onto a curved surface. In the extreme, that ability would allow them to wrap a projected image around column or pillar.

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The complex geometry example illustrates a projector offset creating a horizontal keystone problem. The application is further complicated by the wave-shaped screen.

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Using X-WARP, the first step to correct the distortion is to offset the keystone using X-WARP software by pulling in the upper and lower left corners. The next step is to use the X-WARP alignment grid to create a projection warp map. The map is immediately applied to the output video, effectively cancelling the geometry of the screen.