101,179 research outputs found
Continuous Interaction with a Virtual Human
No full textReidsma D, Truong K, van Welbergen H, et al. Continuous Interaction with a Virtual Human. In: Salah AA, Gevers T, eds. Proceedings eNTERFACE'10: 6th International Summer Workshop on Multimodal Interfaces (eNTERFACE'10). Amsterdam: University of Amsterdam; 2010: 24-39
Robustifying Eye Center Localization by Head Pose Cues
No full textHead pose and eye location estimation are two closely related issues which refer to similar application areas. In recent years, these problems have been studied individually in numerous works in the literature. Previous research shows that cylindrical head models and isophote based schemes provide satisfactory precision in head pose and eye location estimation, respectively. However, the eye locator is not adequate to accurately locate eye in the presence of extreme head poses. Therefore, head pose cues may be suited to enhance the accuracy of eye localization in the presence of severe head poses.In this paper, a hybrid scheme is proposed in which the transformation matrix obtained from the head pose is used to normalize the eye regions and, in turn the transformation matrix generated by the found eye location is used to correct the pose estimation procedure. The scheme is designed to (I) enhance the accuracy of eye location estimations in low resolution videos, (2) to extend the operating range of the eye locator and (3) to improve the accuracy and re-initialization capabilities of the pose tracker.From the experimental results it can be derived that the proposed unified scheme improves the accuracy of eye estimations by 16% to 23%. Further, it considerably extends its operating range by more than 15, by overcoming the problems introduced by extreme head poses. Finally, the accuracy of the head pose tracker is improved by 12% to 24%
Einleitung. WissenSchaf(f)t Geschlecht: Machtverhältnisse und feministische Wissensproduktion
No full textSänger E. Einleitung. WissenSchaf(f)t Geschlecht: Machtverhältnisse und feministische Wissensproduktion. In: Behmenburg L, Berweger M, Gevers J, Nolte K, Sänger E, Schnädelbach A, eds. Wissenschaf(f)t Geschlecht. Machtverhältnisse und feministische Wissensproduktion. Frankfurter feministische Texte : Sozialwissenschaften. Vol 9. Königstein: Ulrike Helmer; 2007: 9-25
Methods and technologies for gait analysis
No full textGait analysis is a highly active research area with a wide range of applications in clinical settings, surveillance and human-computer interaction. The focus of this chapter is the clinical aspect of gait analysis, in which accuracy and precision are essential. Subsequently, the chapter focuses on various techniques of measuring gait and introduces taxonomy for their analysis. From this perspective, motion measurements using motion capture and inertial sensors are presented. Motion capture techniques are analyzed under sections of marker-based and markerless techniques and their common applications are exemplified. Additionally, accelerometers, gyroscopes, magnetometers and their applications are presented in the inertial measurements section. Finally, force measurements and measurement of electrical activity of muscles are explained briefly
Letter, [Author unclear] to Paulina T. Merritt
No full textHandwritten letter to Paulina Merritt from an unknown author, October 1, 1876.
L. COURTOIS, [compte rendu de] Lieve GEVERS, bisschoppen en flaminganten. Documente uit kerkelijke archieven over de controverse rond het taalregime in het katholiek middelbaar onderwijs. 1900-1906, dans Revue du Nord, t. XCVI, n° 407, octobre-décembre 2014, p. 955-956
No full textcompte rendu de Lieve GEVERS, bisschoppen en flaminganten. Documente uit kerkelijke archieven over de controverse rond het taalregime in het katholiek mid-delbaar onderwijs. 1900-1906 (Académie royale de Belgique. Commission royale d’histoire, Collection grand in-8°, t. CXIV), Bruxelles, 2008, dans Revue du Nord, t. XCVI, n° 407, octobre-décembre 2014, p. 955-956recension of Lieve GEVERS, bisschoppen en flaminganten. Documente uit kerkelijke archieven over de controverse rond het taalregime in het katholiek mid-delbaar onderwijs. 1900-1906 (Académie royale de Belgique. Commission royale d’histoire, Collection grand in-8°, t. CXIV), Bruxelles, 2008, dans Revue du Nord, t. XCVI, n° 407, octobre-décembre 2014, p. 955-95
Facial features matching using a virtual structuring element
No full textFace analysis in a real-world environment is a complex task as it should deal with challenging problems such as pose variations, illumination changes and complex backgrounds. The use of active appearance models for facial features detection is often successful in restricted environments, but the performance decreases when applied in unconstrained environments. Therefore, in this paper, we introduce a novel method that integrates the knowledge of a face detector inside the shape and the appearance models by using what we call a 'virtual structuring element' (VSE). In this way the possible settings of the active appearance models are constrained in an appearance-driven manner. The use of a virtual structuring element in an active appearance model provides increased performance in both accuracy and robustness over standard active appearance models applied to different environments
Joint attention by gaze interpolation and saliency
No full textJoint attention, which is the ability of coordination of a common point of reference with the communicating party, emerges as a key factor in various interaction scenarios. This paper presents an image-based method for establishing joint attention between an experimenter and a robot. The precise analysis of the experimenter's eye region requires stability and high-resolution image acquisition, which is not always available. We investigate regression-based interpolation of the gaze direction from the head pose of the experimenter, which is easier to track. Gaussian process regression and neural networks are contrasted to interpolate the gaze direction. Then, we combine gaze interpolation with image-based saliency to improve the target point estimates and test three different saliency schemes. We demonstrate the proposed method on a human-robot interaction scenario. Cross-subject evaluations, as well as experiments under adverse conditions (such as dimmed or artificial illumination or motion blur), show that our method generalizes well and achieves rapid gaze estimation for establishing joint attention. © 2012 IEEE
Zivilgesellschaft als Symptom? Vom Nutzen und Nachteil des Konzepts der Zivilgesellschaft
No full textSänger E. Zivilgesellschaft als Symptom? Vom Nutzen und Nachteil des Konzepts der Zivilgesellschaft. In: Berweger M, Behmenburg L, Gevers J, Nolte K, Sänger E, Schnädelbach A, eds. Wissenschaf(f)t Geschlecht. Machtverhältnisse und feministische Wissensproduktion. Frankfurter feministische Texte : Sozialwissenschaften. Vol 9. Königstein: Ulrike Helmer; 2007: 197-213
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