Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Multiple view geometry in computer visiond
Multiple view geometry in computer visiond
Interaction with a Projection Screen Using a Camera-tracked Laser Pointer
MMM '98 Proceedings of the 1998 Conference on MultiMedia Modeling
A flexible projector-camera system for multi-planar displays
CVPR'04 Proceedings of the 2004 IEEE computer society conference on Computer vision and pattern recognition
Visual capture and understanding of hand pointing actions in a 3-D environment
IEEE Transactions on Systems, Man, and Cybernetics, Part B: Cybernetics
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We present an uncalibrated projector-camera system in which the information displayed onto a planar screen can be interactively warped according to an arbitrary planar homography. The user interacts with the system through a laser pointer, whose displacements on the screen plane are captured by the camera, interpreted as mouse drags, and used to control the warping process. Applications of our interactive warping system encompass arbitrary (pan/tilt/screw) keystone correction, visualization of undistorted information for a user being in a general position with respect to the screen (including virtual anamorphosis as a special case), and self-shadow avoidance by a nearly-parallel projection.