PILC Projector: RGB-IR Projector for Pixel-level Infrared Light Communication

The projection of invisible data on visible images can facilitate seamless interactive projection, since data embedded in regular images is unobtrusive to human viewers. However, the previous techniques sacrificed one of the following key goals: 1) calibration-free setup; 2) full-color projection; or 3) high contrast image. In this paper, we propose a Pixel-level Infrared Light Communication (PILC) projector that achieves all these requirements by adding an infrared light source to the full-color projector. To provide a proof of concept, we built a functional prototype, evaluated its performance, and presented a basic application.