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Facial feature tracking for cursor control
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DOI：10.1016/j.jnca.2004.07.003.png)
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This work is motivated by the goal of providing a non-contact means of controlling the mouse pointer on a computer system for people with motor difficulties using low-cost, widely available hardware. The required information is derived from video data captured using a web camera mounted below the computer's monitor. A colour filter is used to identify skin coloured regions. False positives are eliminated by optionally removing background regions and by applying statistical rules that reliably identify the largest skin-coloured region, which is assumed to be the user's face. The nostrils are then found using heuristic rules. The instantaneous location of the nostrils is compared with their at-rest location; any significant displacement is used to control the mouse pointer's movement. The system is able to process 18 frames per second at a resolution of 320 by 240 pixels, or 30 fps at 160 by 120 pixels using moderately powerful hardware (a 500 MHz Pentium III desktop computer). (c) 2006 Elsevier Ltd. All rights reserved.
Keyword:
human-computer interaction
perceptual interfaces
face tracking
enabling technologies
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