Specularity-free projection on nonplanar surface

Abstract

In projection display systems, specular reflection may distract users and obscure the projected useful information. This paper demonstrates that the specular reflection can be avoided by redundantly illuminating the display surface using multiple overlapping projectors and cameras. Our initial system using two projectors and a single camera is presented. The system automatically estimates where specular reflection occurs and which projector generates the specular reflection. Then, the system blanks the light of the projector falling on the specular region while boosting the other projector's light so that the additional light is projected onto the surface consistently. Through experiments, it is shown that the system eliminates specular reflection successfully while maintaining a good image quality. © Springer-Verlag Berlin Heidelberg 2005.