Real-Time Recognition of 3D-Pointing Gestures for Human-Machine-Interaction. - Kai Nickel; Rainer Stiefelhagen (DAGM-Symposium, 2003)

Pointing gesture recognition based on 3D-tracking of face, hands and head orientation. - Kai Nickel; Rainer Stiefelhagen (ICMI, 2003)

Real-Time Person Tracking and Pointing Gesture Recognition for Human-Robot Interaction. - Kai Nickel; Rainer Stiefelhagen (ECCV Workshop on HCI, 2004)

3D-Tracking of Head and Hands for Pointing Gesture Recognition in a Human-Robot Interaction Scenario. - Kai Nickel; Edgar Seemann; Rainer Stiefelhagen (FGR, 2004)

Head Pose Estimation Using Stereo Vision For Human-Robot Interaction. - Edgar Seemann; Kai Nickel; Rainer Stiefelhagen (FGR, 2004)

Implementation and evaluation of a constraint-based multimodal fusion system for speech and 3D pointing gestures. - Hartwig Holzapfel; Kai Nickel; Rainer Stiefelhagen (ICMI, 2004)

Natural human-robot interaction using speech, head pose and gestures. - Rainer Stiefelhagen; Christian Fügen; Petra Gieselmann; Hartwig Holzapfel; Kai Nickel; Alex Waibel (IROS, 2004)

Multi-View Head Pose Estimation using Neural Networks. - Michael Voit; Kai Nickel; Rainer Stiefelhagen (CRV, 2005)

A joint particle filter for audio-visual speaker tracking. - Kai Nickel; Tobias Gehrig; Rainer Stiefelhagen; John W. McDonough (ICMI, 2005)

Estimating the Lecturer's Head Pose in Seminar Scenarios - A Multi-view Approach. - Michael Voit; Kai Nickel; Rainer Stiefelhagen (MLMI, 2005)

Microphone Array Driven Speech Recognition: Influence of Localization on the Word Error Rate. - Matthias Wölfel; Kai Nickel; John W. McDonough (MLMI, 2005)

An Audio-Visual Particle Filter for Speaker Tracking on the CLEAR'06 Evaluation Dataset. - Kai Nickel; Tobias Gehrig; Hazim Kemal Ekenel; John W. McDonough; Rainer Stiefelhagen (CLEAR, 2006)

Neural Network-Based Head Pose Estimation and Multi-view Fusion. - Michael Voit; Kai Nickel; Rainer Stiefelhagen (CLEAR, 2006)

Tracking of the Articulated Upper Body on Multi-View Stereo Image Sequences. - Julius Ziegler; Kai Nickel; Rainer Stiefelhagen (CVPR (1), 2006)

A Bayesian Approach for Multi-view Head Pose Estimation. - Michael Voit; Kai Nickel; Rainer Stiefelhagen (MFI, 2006)

Activity Recognition and Room-Level Tracking in an Office Environment. - Christian Wojek; Kai Nickel; Rainer Stiefelhagen (MFI, 2006)

Audio-visual perception of a lecturer in a smart seminar room. - Rainer Stiefelhagen; Keni Bernardin; Hazim Kemal Ekenel; John W. McDonough; Kai Nickel; Michael Voit; Matthias Wölfel (Signal Process., 2006)

Head Pose Estimation in Single- and Multi-view Environments - Results on the CLEAR'07 Benchmarks. - Michael Voit; Kai Nickel; Rainer Stiefelhagen (CLEAR, 2007)

Fast audio-visual multi-person tracking for a humanoid stereo camera head. - Kai Nickel; Rainer Stiefelhagen (Humanoids, 2007)

Visual recognition of pointing gestures for human-robot interaction. - Kai Nickel; Rainer Stiefelhagen (Image Vis. Comput., 2007)

Enabling Multimodal Human-Robot Interaction for the Karlsruhe Humanoid Robot. - Rainer Stiefelhagen; Hazim Kemal Ekenel; Christian Fügen; Petra Gieselmann; Hartwig Holzapfel; Florian Kraft; Kai Nickel; Michael Voit; Alex Waibel (IEEE Trans. Robotics, 2007)

Dynamic Integration of Generalized Cues for Person Tracking. - Kai Nickel; Rainer Stiefelhagen (ECCV (4), 2008)

Visuelle Benutzermodellierung mit Tracking und Zeigegestenerkennung für einen humanoiden Roboter. - Kai Nickel (2008)

Activity Classification. - Kai Nickel; Montse Pardàs; Rainer Stiefelhagen; Cristian Canton-Ferrer; José Luis Landabaso; Josep R. Casas (Computers in the Human Interaction Loop, 2009)