Enabling natural interaction by approaching objects

This paper introduces the research issues to make a major step towards natural human interaction with mobile multimodal systems. Thereby, we aim at combining explicit and implicit interaction to blended multimodal interaction. Natural inter-action and the requirement to anticipate a mix of purposive behavior and uncertainty requires rendering information in a way that is compatible with and aware of the situational context. In two application examples we illustrate our approaches of interaction by movement. As the basis for adaptive behavior, this paper describes the conclusions drawn from tracking the mobile user in a museum's environment. It also illuminates different aspects of this technology, such as ac-curacy and costs, and illustrates the results of our project using the specific technology.