GREFIT: Visual Recognition of Hand Postures

Nölker C, Ritter H (1999)
In: Gesture-Based Communication in Human-Computer Interaction: International GestureWorkshop, GW’99. Braffort A, Gherbi R, Gibet S, Richardson J, Teil D (Eds); Lecture Notes in Computer Science, 1739. Berlin: Springer: 61-72.

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Braffort, A. ; Gherbi, R. ; Gibet, Sylvie ; Richardson, J. ; Teil, D.
Abstract
In this paper, we present GREFIT (Gesture REcognition based on FInger Tips) which is able to extract the 3-dimensional hand posture from video images of the human hand. GREFIT uses a two-stage approach to solve this problem. This paper is based on earlier presented results of a system to locate the 2-D positions of the fingertips in images. We now describe the second stage, where the 2-D position information is transformed by an artificial neural net into an estimate of the 3-D configuration of an articulated hand model, which is also used for visualization. This model is designed according to the dimensions and movement possibilities of a natural human hand. The virtual hand imitates the user’s hand to an astonishing accuracy and can track postures from grey scale images at a speed of 10 Hz.
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Nölker C, Ritter H. GREFIT: Visual Recognition of Hand Postures. In: Braffort A, Gherbi R, Gibet S, Richardson J, Teil D, eds. Gesture-Based Communication in Human-Computer Interaction: International GestureWorkshop, GW’99. Lecture Notes in Computer Science. Vol 1739. Berlin: Springer; 1999: 61-72.
Nölker, C., & Ritter, H. (1999). GREFIT: Visual Recognition of Hand Postures. In A. Braffort, R. Gherbi, S. Gibet, J. Richardson, & D. Teil (Eds.), Lecture Notes in Computer Science: Vol. 1739. Gesture-Based Communication in Human-Computer Interaction: International GestureWorkshop, GW’99 (pp. 61-72). Berlin: Springer.
Nölker, C., and Ritter, H. (1999). “GREFIT: Visual Recognition of Hand Postures” in Gesture-Based Communication in Human-Computer Interaction: International GestureWorkshop, GW’99, ed. A. Braffort, R. Gherbi, S. Gibet, J. Richardson, and D. Teil Lecture Notes in Computer Science, vol. 1739, (Berlin: Springer), 61-72.
Nölker, C., & Ritter, H., 1999. GREFIT: Visual Recognition of Hand Postures. In A. Braffort, et al., eds. Gesture-Based Communication in Human-Computer Interaction: International GestureWorkshop, GW’99. Lecture Notes in Computer Science. no.1739 Berlin: Springer, pp. 61-72.
C. Nölker and H. Ritter, “GREFIT: Visual Recognition of Hand Postures”, Gesture-Based Communication in Human-Computer Interaction: International GestureWorkshop, GW’99, A. Braffort, et al., eds., Lecture Notes in Computer Science, vol. 1739, Berlin: Springer, 1999, pp.61-72.
Nölker, C., Ritter, H.: GREFIT: Visual Recognition of Hand Postures. In: Braffort, A., Gherbi, R., Gibet, S., Richardson, J., and Teil, D. (eds.) Gesture-Based Communication in Human-Computer Interaction: International GestureWorkshop, GW’99. Lecture Notes in Computer Science. 1739, p. 61-72. Springer, Berlin (1999).
Nölker, Claudia, and Ritter, Helge. “GREFIT: Visual Recognition of Hand Postures”. Gesture-Based Communication in Human-Computer Interaction: International GestureWorkshop, GW’99. Ed. A. Braffort, R. Gherbi, Sylvie Gibet, J. Richardson, and D. Teil. Berlin: Springer, 1999.Vol. 1739. Lecture Notes in Computer Science. 61-72.
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