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ThinkMind // UBICOMM 2010, The Fourth International Conference on Mobile Ubiquitous Computing, Systems, Services and Technologies // View article ubicomm_2010_17_10_10187


Continuous Gesture Recognition for Resource Constrained Smart Objects

Authors:
Bojan Milosevic
Elisabetta Farella
Luca Benini

Keywords: Hidden Markov Models; Tangible Interfaces; Smart Objects; Gesture Recognition; Fixed Point

Abstract:
Tangible User Interfaces (TUIs) feature physical objects that people can manipulate to interact with smart spaces. Smart objects used as TUIs can further improve user experience by recognizing and coupling natural gestures to commands issued to the computing system. Hidden Markov Models (HMM) are a typical approach to recognize gestures sampled from inertial sensors. In this paper we implement a HMM-based continuous gesture recognition algorithm, optimized for low-power, low-cost microcontrollers without floating point unit. The proposed solution is validated on a set of gestures performed with the Smart Micrel Cube (SMCube), which embeds a 3-axis accelerometer and an 8-bit microcontroller. Through the paper we evaluate the implementation issues and describe the solutions adopted for gesture segmentation and for the fixed point HMM forward algorithm. Furthermore, we explore a multiuser scenario where up to 4 people share the same device. Results show that the proposed solution performs comparably to the standard forward algorithm and can be efficiently used for low cost smart objects.

Pages: 391 to 396

Copyright: Copyright (c) IARIA, 2010

Publication date: October 25, 2010

Published in: conference

ISSN: 2308-4278

ISBN: 978-1-61208-100-7

Location: Florence, Italy

Dates: from October 25, 2010 to October 30, 2010

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