Camera-Projector System

Application

A software for camera-projector interaction was developed by Juan Roldan and Ushakiran Soutapalli at the Microsystem & Machine Vision Laboratory (MMVL) at Sheffield Hallam University, UK.

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.

Future Work

UML-diagram of proposed static structure of future software version

UML-diagram of proposed collaboration of future software version

More different mouseevents
KDE-miniprogram with configuration wizard

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 also available at video.google.co.uk)	Calibration of the screen using projected patterns	Prototype of new user-interface (13.7 MByte video)