Elliptic vs. Rectangular Blending for Multi-Projection Displays

We compared two edge-blending methods for multiprojection displays, elliptic and rectangular blending, by simulating three common situations: (1) an inaccurately estimated calibration parameter, (2) a worn projector lamp, and (3) a shifted viewpoint. We used a twolevel-of-detail display including a high-gain rear-projection screen in the simulation to demonstrate an extreme case. The comparisons showed how strongly inaccurate elements affect a composite besides affecting the appearance itself. A subjective assessment was also carried out to obtain the evaluations of actual users. The simulation results showed that in many cases elliptic blending is more effective than rectangular blending. key words: multi-projection display, edge blending, elliptic blending, locally pre-normalizing Laplacian filter