Abstract
Recently, many AR applications are developed. They use AR to enhance visual information. In this study, as a application different from existing AR application, we newly develop three NUI (Natural User Interface) applications as the examples of Augmented Reality (AR). These applications recognize a hand and a marker using a web camera. In this way, user can operate CG. To realize the NUI, these applications use the AR library (ARToolkit) to detect the markers, and use the imaging library (OpenCV) to detect the hand. These applications also use Restricted EM algorithm to realize the NUI, even if the environment where camera can moves.
