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Tim
Asked: 2015-02-24 09:25:53 +0800 CST

Solution to perspectivicly warp the whole screen?

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Is there a way to perspectively warp the whole screen, so i can correct a image which is displayed on a projection screen from a strange angle?

Background is, we have a play and i would like to project background screens. Because i want to use a variety of Media Types and also would like to remote control the whole thing, the easiest way would be to simply warp the whole screen instead of using projection mapping or something.

To be clear, there is just one rectangular surface i need to transform the image on.

projector

1 Answers

  1. You can do that with xrandr tool and its --transform option to which you can pass a 3x3 transformation matrix.

    Unfortunately I don't know any GUI to compute the transformation matrix. But several open sources project have tool to do that (OpenCV, openFrameworks...) from 2 set of 4 corners.

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