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Preface Knowledge representation and use has been a central concern for computer vision since decades. This topic becomes even more important as it is now possible to augment the reality thru real-time computer graphics in combination with real-time computer vision. As both disciplines need to cooperate, they also need to agree on common representation… (More)
In some situations, high quality eye tracking systems are not affordable. This generates the demand for inexpensive systems built upon non-specialized, <i>off the shelf</i> devices. Investigations show that algorithms developed for high resolution systems do not perform satisfactorily on such lowcost and low resolution systems. We investigate algorithms… (More)
Das Titelbild zeigt eine Visualisierung des Median-Cut Algorithmus zur Farbquantisierung nach P.
Commercial gaze-tracking devices provide accurate measurements of the visual gaze and are applied to a broad range of problems in marketing, human-computer interaction, and health care technology. In some applications commercial systems are either unavailable or unaffordable. Therefore, developing low cost solutions using off the shelf components is… (More)
The development of gaze tracking algorithms is very much bound to the specific setup and properties of the respective system they are used in. This makes it hard e. g. to compare their performance. We propose Gazelnut, a modular system to ease the development and comparison of gaze tracking algorithms, which also makes it independent from the permanent… (More)