Grasp strategy when experiencing hands of various size
ABSTRACT An objective evaluation of a system that provides the experience of hands of different sizes is performed from the viewpoint of the change in grasping pattern. The hand size is recognized as being different from that of the subject's actual hand (normal hand) when the hands of various sizes are presented in an environment that appears to be of constant size. This is achieved by viewing a hand and an analogous object through an optical system that adjusts its scaling rate to visually maintain the object size. An objective evaluation of this system is performed by investigating the grasp strategy depending on the hand size and object size reported in T. Shirai et al. (1998). The experimental results reveal that a similar grasp strategy that depends on hand size is observed for the proposed system based on the presented hand size. In addition, the experimental results reveal that it is important to vary the hand and object sizes visually through an optical system rather than simply using analogous objects without visual scaling.
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ABSTRACT: This paper proposes a method for measuring 3-dimensional (3D) environment and estimating cam-era movement with two fish-eye images. This method deals with large distortion of images from a fish-eye camera to calibrate internal and external camera pa-rameters precisely by simultaneous estimation. In this paper, we analyze 3D measurement accuracy based on a theoretical model and evaluate it in practical analysis in experimental and real environments. These analy-ses show that the theoretical measurement error model works over a wide range of fish-eye views.
Conference Paper: Effective Adaptation to Experience of Different-Sized Hand.[Show abstract] [Hide abstract]
ABSTRACT: This paper reports the effect of pre-operation intended to familiarizing oneself with vicarious experiences of different-sized hands. To measure this effect, the index of degree of immersion (DOI) is pro- posed, which represents whether observed behavior is appropriate for the presented hand size. The DOI is measured for various sizes of hands when changing type of pre-operation which is classified based on relationship between hands and objects. The experimental results show that the pre- operation is effective for familiarizing the presented sized hand, especially in larger sized hands, and that behavior of touching and controlling an object in position is important for effective pre-operation.Advances in Visual Computing, 5th International Symposium, ISVC 2009, Las Vegas, NV, USA, November 30 - December 2, 2009, Proceedings, Part II; 01/2009