Projector-camera systems (pro-cam), also called camera-projector systems, augment a local surface with a projected captured image of a remote surface, creating a shared workspace for remote collaboration and communication. Projector-camera systems may also be used for artistic and entertainment purposes. A pro-cam system consists of a vertical screen for implementing interpersonal space where front-facing videos are displayed, and a horizontal projected screen on the tabletop for implementing shared workspace where downward facing videos are overlapped. An automatically pre-warped image is sent to the projector to ensure that the horizontal screen appears undistorted.
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