Kramer Electronics VP-790 - Manual (Page 7)

VP-790 Warp Generator – Overview 5
3 Overview
The VP-790 Warp Generator is an application that lets you manipulate video stream
warps quickly with its simple-to-use editor. Image warping can be useful when
projecting onto uneven surfaces and for correcting projector misalignment. It is also
useful for the correcting of projected images on concave or convex surfaces or even
for intentional image distortion.
The VP-790 Warp Generator uses two file types:
• Grid Files (.txt): files that contain information regarding output resolution, grid
co-ordinates, number of points in a grid, and so on. Grid Files are displayed
as an array of grid points and define how the image is to be warped. To create
a warp, points can be dragged and dropped to compensate for the projected
image and then converted into a warp file ready for upload to the
VP-790
machine
• Warp Files (.twf): files generated from Grid files that can be uploaded to
VP-790 to be used as a warp map and applied to a given video stream
Note that up to eight warp maps can be stored on the VP-790.
The Warp Generator uses the warp test pattern, generated by the VP-790, as a
visual grid tool to tweak and see how accurate the created warp is. Simply edit the
warp grid until the Warp Test Pattern looks uniform (unless the aim is to make it
non-uniform).
U
Section 4
U
defines the Warp Generator software tools and
U
Section 5
U
describes how
to use those tools to prepare a warp map.
i