Interactive projection

Projectors are becoming very compact, and this is driving an evolution in their functionality. The handheld projector in this work is capable of stabilized projection under hand-jitter, and allows the user to interact with projected information. The ideas anticipate current handheld devices, such as cellphones and PDAs, being augmented with projectors to supplement or even replace the built-in screen with a larger, projected display. The method of interacting with a projection demonstrates a new medium for WIMP functionality. The work goes further still in showing how handheld projection supports a new type of interaction for multiple users, who can share a pooled display in which individual projections are intelligently combined.