Camera-Projector System

Application

A software for an interactive camera-projector system was developed by Juan Roldan at the Microsystem & Machine Vision Laboratory (MMVL) at Sheffield Hallam University, UK. The software is still under development, but it is planned to be released as open-source software in Q3 2006.

The software makes use of a low cost off-the shelf webcam that is calibrated against a standard projector screen. The webcam is used to determine the position of physical pointer (e.g. a pen) which is then used to virtually move the X11 pointer. Point-and-click functionality has also been implemented.

The vision system uses the Mimas real-time computer vision toolkit developed by the MMVL.

How it works

Mouse clicks

The standard deviation of a few recent mouse-positions is used as a criterion, wether the mouse is stationary or moving. If the mouse is stationary, a mouse click is issued.

Gallery

Interactive camera-projector system	Long demonstration of the prototype-system (11.4 MByte video)	Short interactive slides presentation with the system (6.3 MByte video)
Browsing the file-system and trying to play minigolf (14.4 MByte video)	Playing Reversi against the computer (5.54 MByte video))	Calibration of the screen using projected patterns