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XCode for Real Time Perspective Correction of Projector Image

14

Description

I investigate a new approach for determining the pre-warp homography required to correct a projector image for perspective when projecting on a single flat surface. By using a depth camera placed at a fixed transform near the projector, the normal of the surface can be predicted in real time. By updating a homography on the image to be projected based on the projector intrinsics and the surface normal, the image can be correctly pre-warped in real time. This allows for applications where the surface and the projector/camera pair can be moved while the projection remains rectangular and of the correct aspect ratio when viewed from a position normal to the image.

MATLAB code for homography calculation

Perspective Correction of Distorted Projectors with an Uncalibrated Camera

 

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