arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0912.3973cs.CV
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一种新的鲁棒EMG模式识别特征提取方法

A Novel Feature Extraction for Robust EMG Pattern Recognition

Prince of Songkla University(宋卡王子大学)

Angkoon Phinyomark, Chusak Limsakul, Pornchai Phukpattaranont

摘要:

各种噪声是肌电信号识别的主要问题。因此,去除噪声的方法成为肌电信号分析中最重要的问题。本文采用高斯白噪声来表示干扰。通常,WGN难以使用典型的滤波来去除,并且去除WGN的解决方案是有限的。此外,噪声去除是执行特征提取之前的重要步骤,其用于基于EMG的识别。本研究的目的是提出一种新的特点,容忍与WGN。因此,不需要噪声去除算法。提出了两种新的均值和中值频率(MMNF和MMDF)用于鲁棒的特征提取。十六个现有的功能和两个新奇的评价在嘈杂的环境中。将具有各种信噪比(SNR)(即20-0 dB)的WGN添加到原始EMG信号中。实验结果表明,MMNF在肌电信号的识别中有很好的效果,尤其是在弱肌电信号的识别中。在信噪比为0 dB的强噪声背景下,MMNF的误差约为5- 10%,与MMDF和直方图相近,而其他特征的误差都在20%以上。而在强肌电信号中,MMNF的误差优于其他特征的误差。此外,MMNF,肌电信号直方图和Willison幅度的组合被用作分类任务的特征向量。实验结果表明,该方法在噪声环境下的识别效果优于其他候选特征。从以上结果表明,MMNF可以用于新的鲁棒特征提取。

英文摘要:

Varieties of noises are major problem in recognition of Electromyography (EMG) signal. Hence, methods to remove noise become most significant in EMG signal analysis. White Gaussian noise (WGN) is used to represent interference in this paper. Generally, WGN is difficult to be removed using typical filtering and solutions to remove WGN are limited. In addition, noise removal is an important step before performing feature extraction, which is used in EMG-based recognition. This research is aimed to present a novel feature that tolerate with WGN. As a result, noise removal algorithm is not needed. Two novel mean and median frequencies (MMNF and MMDF) are presented for robust feature extraction. Sixteen existing features and two novelties are evaluated in a noisy environment. WGN with various signal-to-noise ratios (SNRs), i.e. 20-0 dB, was added to the original EMG signal. The results showed that MMNF performed very well especially in weak EMG signal compared with others. The error of MMNF in weak EMG signal with very high noise, 0 dB SNR, is about 5-10 percent and closed by MMDF and Histogram, whereas the error of other features is more than 20 percent. While in strong EMG signal, the error of MMNF is better than those from other features. Moreover, the combination of MMNF, Histrogram of EMG and Willison amplitude is used as feature vector in classification task. The experimental result shows the better recognition result in noisy environment than other success feature candidates. From the above results demonstrate that MMNF can be used for new robust feature extraction.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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