应用科学学报 ›› 2017, Vol. 35 ›› Issue (1): 81-89.doi: 10.3969/j.issn.0255-8297.2017.01.009

• 信号与信息处理 • 上一篇    下一篇

改进线性外推法预估器的手势跟踪

姚恒, 袁敏, 秦川, 田颖   

  1. 上海理工大学 光电信息与计算机工程学院, 上海 200093
  • 收稿日期:2016-03-28 修回日期:2016-04-12 出版日期:2017-01-30 发布日期:2017-01-30
  • 作者简介:姚恒,博士,讲师,研究方向:数字图像防伪鉴定、图像识别与增强,E-mail:hyao@usst.edu.cn
  • 基金资助:

    国家自然科学基金(No.61303203);沪江基金(No.B14002/D14002)资助

Gesture Tracking Using Improved Linear Extrapolation Predictor

YAO Heng, YUAN Min, QIN Chuan, TIAN Ying   

  1. Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
  • Received:2016-03-28 Revised:2016-04-12 Online:2017-01-30 Published:2017-01-30

摘要:

针对动态手势识别系统手势跟踪问题,提出了一种基于改进线性外推法预估器的手势跟踪算法.该算法用前两帧的平均位移作为未来帧的位移预测,提高了预测精度;采用5点直线拟合,根据拟合直线斜率判断目标遮挡和重叠状态下的运动方向,克服了由于手势目标质心变化引起的预测位置偏离实际目标的缺陷.实验结果表明:所提出的算法能准确稳定地跟踪手势目标,平均预测偏差缩小到3.374像素,并且能在手势被遮挡和手势重叠的情况下实现有效跟踪.

关键词: 线性外推, 手势跟踪, 手势遮挡重叠, 动态手势识别系统

Abstract:

To improve accuracy of gesture tracking in dynamic gesture recognition system, a gesture tracking algorithm using an improved linear extrapolation predictor is proposed.Specifcally, to improve prediction accuracy, the algorithm uses the average displacement of two previous frames as the future-frame predictor.Besides, to deal with occlusion and hands-overlap, the target movement direction is determined based on the slope of ftting line with fve points.Thus deviation between the predicted and actual positions caused by the changing gesture centroid is reduced.Experimental results show that efciency of the proposed gesture tracking method with the average prediction deviation is reduced to 3.374 pixels.In addition, even in the case of occlusion and hands-overlap, the gesture target can also be tracked effectively.

Key words: gesture tracking, linear extrapolation, dynamic gesture recognition system, gesture occlusion and overlap

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