http://www1.cs.columbia.edu/CAVE/projects/photo_tags/ In this project, we propose the use of active illumination to create optical ("virtual") tags in a scene. As a key advantage, our method does not require making physical contact with, or alterations to, the objects in the scene, as existing tagging methods (barcodes or LED tags) do. Our basic idea is simple: We use an infrared (IR) projector to project temporally-coded (blinking) dots onto selected points in a scene. These tags are invisible to the human eye, but detected as time-varying codes by an IR-sensitive photo detector. We demonstrate several applications of our system, including, photo-browsing, e-commerce, augmented reality, and objection localization. Author: ColumbiaVisionLab Keywords: tagged pixels augmented reality phototags infrared photo browsing Added: June 23, 2008
