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ROBOMECH Journal
Fig. 3 | ROBOMECH Journal

Fig. 3

From: Stable haptic feedback generation for mid-air gesture interactions: a hidden Markov model-based motion synthesis approach

Fig. 3

Ideal motion pattern and primitive motion element definition. Definition of primitive motion element from reference motion pattern for different gestures. a Horizontal drag, b vertical drag, c tapping, d zooming. Here the reference motion pattern is obtained from different subjects and the outlier motion elements are removed based on \(R^2\) value criteria to get the mean and standard deviation as shown by the shaded region in the figure. Finally, a curve fitting tool is used to define primitive motion elements, mathematically in each state

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