GVU-PROCAMS: enabling novel projected interfaces

Front projection allows large displays to be deployed relatively easily. However, it is sometimes difficult to find a location to place a projector, especially for ad-hoc installations. Additionally, front projection suffers from shadows and occlusions, making it ill-suited for interactive displays. The GVU-PROCAMS system allows programmers to deploy projectors and displays easily in arbitrary locations by enabling enhanced keystone correction via warping on 3D hardware. In addition, it handles the calibration of multiple projectors using computer vision to produce a redundantly illuminated surface. Redundant illumination offers robustness in the face of occlusions, providing a user with the experience of a rear-projected surface. This paper presents a stand-alone application (WinPVRP) and a programming system (GVU-PROCAMS) that easily allows others to create projected displays with enhanced warping and redundant illumination.