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多导联心电信号特征检测系统的设计 被引量:9
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作者 彭良广 庞宇 +3 位作者 王元发 林金朝 李章勇 陈亚军 《计算机工程与设计》 北大核心 2020年第3期896-900,F0003,共6页
为提高在运动负荷试验中检测心电图(electrocardiogram,ECG)特征的精度,提供与评估心脏功能相关的体征参数,设计一套多导联心电信号特征检测系统。系统包含能记录十二导联以及CM5与Nehb-D导联心电信号的多导联心电采集盒和体征检测软件... 为提高在运动负荷试验中检测心电图(electrocardiogram,ECG)特征的精度,提供与评估心脏功能相关的体征参数,设计一套多导联心电信号特征检测系统。系统包含能记录十二导联以及CM5与Nehb-D导联心电信号的多导联心电采集盒和体征检测软件,利用自适应小波变换消除运动心电信号的基线漂移,采用特征检测算法实时定位R波、PR段中点以及ST段,通过线性拟合曲线求解心率值与ST段水平值的关系。实验结果表明,检测系统可显示平稳的运动ECG,对运动心电信号QRS波群的检测精度为99%以上,ST段随心率值增加而压低越大。系统具有易便携、精度高和成本低的优势。 展开更多
关键词 心电采集盒 体征检测软件 运动心电图 特征检测精度 线性拟合
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Vehicle detection algorithm based on codebook and local binary patterns algorithms 被引量:1
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作者 许雪梅 周立超 +1 位作者 墨芹 郭巧云 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第2期593-600,共8页
Detecting the moving vehicles in jittering traffic scenes is a very difficult problem because of the complex environment.Only by the color features of the pixel or only by the texture features of image cannot establis... Detecting the moving vehicles in jittering traffic scenes is a very difficult problem because of the complex environment.Only by the color features of the pixel or only by the texture features of image cannot establish a suitable background model for the moving vehicles. In order to solve this problem, the Gaussian pyramid layered algorithm is proposed, combining with the advantages of the Codebook algorithm and the Local binary patterns(LBP) algorithm. Firstly, the image pyramid is established to eliminate the noises generated by the camera shake. Then, codebook model and LBP model are constructed on the low-resolution level and the high-resolution level of Gaussian pyramid, respectively. At last, the final test results are obtained through a set of operations according to the spatial relations of pixels. The experimental results show that this algorithm can not only eliminate the noises effectively, but also save the calculating time with high detection sensitivity and high detection accuracy. 展开更多
关键词 background modeling Gaussian pyramid CODEBOOK Local binary patterns(LBP) moving vehicle detection
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