| 1. |
- Kragic, Danica, et al.
(författare)
-
Robust Visual Servoing
- 2014
-
Ingår i: Household Service Robotics. - : Elsevier. - 9780128009437 ; , s. 397-427
-
Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- For service robots operating in domestic environments, it is not enough to consider only control level robustness; it is equally important to consider how image information that serves as input to the control process can be used so as to achieve robust and efficient control. In this chapter we present an effort toward the development of robust visual techniques used to guide robots in various tasks. Given a task at hand, we argue that different levels of complexity should be considered; this also defines the choice of the visual technique used to provide the necessary feedback information. We concentrate on visual feedback estimation where we investigate both two- and three-dimensional techniques. In the former case, we are interested in providing coarse information about the object position/velocity in the image plane. In particular, a set of simple visual features (cues) is employed in an integrated framework where voting is used for fusing the responses from individual cues. The experimental evaluation shows the system performance for three different cases of camera-robot configurations most common for robotic systems. For cases where the robot is supposed to grasp the object, a two-dimensional position estimate is often not enough. Complete pose (position and orientation) of the object may be required. Therefore, we present a model-based system where a wire-frame model of the object is used to estimate its pose. Since a number of similar systems have been proposed in literature, we concentrate on the particular part of the system usually neglected-automatic pose initialization. Finally, we show how a number of existing approaches can successfully be integrated in a system that is able to recognize and grasp fairly textured, everyday objects. One of the examples presented in the experimental section shows a mobile robot performing tasks in a real-word environment-a living room.
|
|
| 2. |
- Walters, M. L., et al.
(författare)
-
Evaluating the Robot Personality and Verbal Behavior of Domestic Robots Using Video-Based Studies
- 2014
-
Ingår i: Household Service Robotics. - : Elsevier. - 9780128009437 ; , s. 467-486
-
Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- Robots are increasingly being used in domestic environments and should be able to interact with inexperienced users. Human-human interaction and human-computer interaction research findings are relevant, but often limited because robots are different from both humans and computers. Therefore, new human-robot interaction (HRI) research methods can identify the design of robots suitable for inexperienced users. A video-based HRI (VHRI) methodology was used to carry out a multi-national HRI user study for the prototype domestic robot BIRON (BIelefeld RObot companioN). Previously, the VHRI methodology was used in constrained HRI situations, while in this study HRIs involved a series of events as part of a "home tour" scenario. Thus, the present chapter is the first study of this methodology in extended HRI contexts with a multi-national approach. Participants watched videos of the robot interacting with a human actor and rated two robot behaviors (Extrovert and Introvert). Participants' perceptions and ratings of the robot's behaviors differed with regard to both verbal interactions and person following by the robot. The study also confirms that the VHRI methodology provides a valuable means to obtain early user feedback, even before fully working prototypes are available. This can usefully guide the future design studies on robots, and associated verbal and non-verbal behaviors.
|
|
