In this paper, we propose a visual-based self-localization algorithm of an indoor mobile robot. The algorithm does not require calibration and can be worked with only a single image by using the projective invariant relationship between natural landmarks. The position of the robot is determined by relative positioning. Also, the method does not require previous information of the position of th...

We will demo FindingHuMo (Finding Human Motion), a real-time user tracking system for Smart Environments. FindingHuMo can perform device-free tracking of multiple (unknown and variable number of) users in the Hallway Environments, just from non-invasive and anonymous (not user specific) binary motion sensor data stream. It can solve complex challenges in multi-user tracking where user motion tr...

FlurMax, a virtual agent, inhabits a hallway at the University of Bielefeld. He resides in a wide-screen panel equipped with a video camera to track and interact with visitors using speech, gesture, and emotional facial expression. For example, FlurMax will detect the presence of visitors and greet them with a friendly wave, saying "Hello, I am Max". FlurMax also recognizes simple gesturing of ...

The goal of this paper is to compare the results of reverberation time measurements obtained with different well-established methods used for this type of measurements, as well as some additional ones which could serve as in situ tool when standard methods are not available. The methods compared in this paper include integrated impulse response measured with pink noise, exponential sweep and ML...

This article considers the varying K-factor of Rician channels and attempts to derive an upper bound on the K-factor of an indoor Radio Frequency Identification Tag channel based solely on the physical shape of the area in which experiments are conducted. The K-factor is found to be highly dependent upon the physical size and shape of the area in which the channel exists. Ray-tracing is used in...

All our interactions have some contextual information associated with them. Be it meeting with a co-worker in the hallway to discuss a project, or a team meeting in a meeting room, or a doctor and her staff meeting a patient, contexts are defined by attributes of all entities involved in the interaction. We consider the dynamic nature of contexts and propose a dynamic object model of context, a...

We investigated how path integration performance can be influenced by five basic path properties in a Virtual Reality Cube. Participants performed pathcompletion tasks in hallway paths with up to 12 segments. Distance information was visual, whereas turning angles were specified through vision and body senses. The ridge regression analyses suggested that path integration was affected by the num...

The received signal strength (RSS) is widely used in range-based localization because of its practical advantages, such as low cost and complexity. For accurate ranging based on the RSS indoor environments, well-defined propagation models (PMs) that consider distortion due to abrupt obstructions are required. This article proposes an exponential PM for hallways whose structures can be modeled a...