We propose a non-intrusive eye tracking system intended for the use of everyday gaze typing using web cameras. We argue that high precision in gaze tracking is not needed for on-screen typing due to natural language r...
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We propose a non-intrusive eye tracking system intended for the use of everyday gaze typing using web cameras. We argue that high precision in gaze tracking is not needed for on-screen typing due to natural language redundancy. This facilitates the use of low-cost video components for advanced multi-modal interactions based on video tracking systems. Robust methods are needed to track the eyes using web cameras due to the poor image quality. A realtime tracking scheme using a mean-shift color tracker and an Active Appearance Model of the eye is proposed. It is possible from this model to infer the state of the eye such as eye corners and the pupil location under scale and rotational changes.
Intelligent robots will make a chance for us to use a computer in our daily life. We implemented a humanoid robot, ASKA, in our university reception desk for the computerized university guidance. This paper describes ...
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Intelligent robots will make a chance for us to use a computer in our daily life. We implemented a humanoid robot, ASKA, in our university reception desk for the computerized university guidance. This paper describes the hardware and software system of ASKA. ASKA can detect a user in front of the reception desk using a stereo camera system attached to the head, and recognize the user's question utterance. It can answer the question by its synthesized voice with hand gestures and head movements.
Teleoperation systems have been developed in order to allow a human operator to perform complex tasks in remote environments. Mobile robots can be considered as a particular example of telemanipulation systems, since ...
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Teleoperation systems have been developed in order to allow a human operator to perform complex tasks in remote environments. Mobile robots can be considered as a particular example of telemanipulation systems, since they can be operated remotely to perform particular tasks. As an example, the inspection of underwater structures and the removal of mines are performed by mobile platforms controlled by a remote operator, which generally takes advantage only of the visual feedback provided by vision systems. In this sense, the nature and completeness of the data provided to the operator about the state of the remote system are of crucial importance for proper task execution, and it is generally accepted that a more efficient achievement of the task can be obtained by increasing the amount of data feedback and using proper MMI. In this paper, the use of a haptic interface is proposed in order to increase a user's perception of the workspace of a mobile robot. In particular, a virtual interaction force is computed on the basis of obstacles surrounding the mobile vehicle in order to prevent dangerous contacts, so that navigation tasks can be carried out with generally better performances. In addition, passivity of the overall system is taken into account, so that stability of the virtual interaction is guaranteed.
Progress in computervision and speech recognition technologies has recently enabled multimodal interfaces that use speech and gestures. These technologies offer promising alternatives to existing interfaces because t...
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Recent developments in the manufacturing and marketing of low power-consumption computers, small enough to be "worn" by users and remain almost invisible, have reintroduced the problem of overcoming the outd...
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Tracking body parts of multiple people in a video sequence is very useful for face/gesture recognition systems as well as humancomputerinteraction (HCI) interfaces. This paper describes a framework for tracking mult...
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ISBN:
(纸本)0769511716
Tracking body parts of multiple people in a video sequence is very useful for face/gesture recognition systems as well as humancomputerinteraction (HCI) interfaces. This paper describes a framework for tracking multiple objects (e.g., hands and faces of multiple people) in a video stream. We use a probabilistic model to fuse the color and motion information to localize the body parts and employ a multiple hypothesis tracking (MHT) algorithm to track these features simultaneously. The MHT algorithm is capable of tracking multiple objects with limited occlusions and is suitable for resolving any data association uncertainty. We incorporated a path coherence function along with MHT to reduce the negative effects of spurious measurements that produce unconvincing tracks and needless computations. The performance of the framework has been validated using experiments on synthetic and real sequence of images.
The human eye has been called the window to the soul. One component of the eye, the pupil, is considered by some psychologists to be the single involuntary indicator of cognitive activity in the human brain. Much rese...
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ISBN:
(纸本)0769512453
The human eye has been called the window to the soul. One component of the eye, the pupil, is considered by some psychologists to be the single involuntary indicator of cognitive activity in the human brain. Much research is currently directed toward eye tracking for the purpose of determining the focus of a subject's attention. This information is then used in various HCI applications (e.g., to operate a system GUI visually). Our efforts in this area are quite unique in that the goal is to use the pupil response as a measure of attentiveness to a particular visual task. We first discuss the role of the pupil in this capacity and the feasibility of a system designed to monitor and interpret pupil response relative to specific visual stimuli. We then demonstrate our approach in implementing a machine vision system (PUPILS-PUPil InterLocution System) that endeavors to gauge a subject's degree of attentiveness relative to a specific visual task. Finally, we present the results of initial experiments using PUPILS, discuss the contributions and shortcomings of this initial prototype and expound our plan for continued research in this area.
The "steady hand" concept is a way of providing assistance for direct manipulation by applying constraints on the motion of a tool shared by a user and a robot. We explore in detail one family of constraints...
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The "steady hand" concept is a way of providing assistance for direct manipulation by applying constraints on the motion of a tool shared by a user and a robot. We explore in detail one family of constraints: virtual fixtures for use in path following tasks. vision is used to sense the desired path, and then the robot encourages motion toward and along the path through a direction-based control law. This "soft" virtual fixture allows the user to move in other, non-preferred directions, maintaining the user's sense of autonomy and control. Experimental results show that user performance in assisted path following improves with virtual fixture augmentation, and differs with varying fixture compliance.
The use of gesture as a natural interface serves as a motivat- ing force for research in modeling, analyzing and recognition of gestures. In particular, humancomputer intelligent interaction needs vision-based gestur...
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A major challenge in mobile robotics is integration of methods into operational autonomous systems. Construction of such systems requires use of methods from perception, control engineering, software engineering, math...
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