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    • 6. 发明授权
    • Video acquisition system for monitoring a subject for a desired physiological function
    • 视频采集系统,用于监测受试者的所需生理功能
    • US09521954B2
    • 2016-12-20
    • US13921939
    • 2013-06-19
    • Xerox Corporation
    • Beilei XuLalit Keshav MesthaSurvi KyalHimanshu J. Madhu
    • A61B5/00A61B5/0205
    • A61B5/0077A61B5/0205A61B5/7221A61B5/7278A61B2562/04A61B2576/00
    • What is disclosed is a video system and method that accounts for differences in imaging characteristics of differing video systems used to acquire video of respective regions of interest of a subject being monitored for a desired physiological function. In one embodiment, video is captured using N video imaging devices, where N≧2, of respective regions of interest of a subject being monitored for a desired physiological function (i.e., a respiratory or cardiac function). Each video imaging device is different but has complimentary imaging characteristics. A reliability factor f is determined for each of the devices in a manner more fully disclosed herein. A time-series signal is generated from each of the videos. Each time-series signal is weighted by each respective reliability factor and combined to obtain a composite signal. A physiological signal can be then extracted from the composite signal. The processed physiological signal corresponds to the desired physiological function.
    • 公开的是一种视频系统和方法,其考虑了用于获取正在被监视的期望生理功能的被摄体的感兴趣区域的视频的不同视频系统的成像特征的差异。 在一个实施例中,使用N个视频成像装置捕获视频,其中N≥2个被监测的对象的各个感兴趣区域用于期望的生理功能(即,呼吸或心脏功能)。 每个视频成像设备是不同的,但具有互补的成像特征。 以这里更全面地公开的方式为每个设备确定可靠性因子f。 从每个视频产生时间序列信号。 每个时间序列信号由每个相应的可靠性因子加权并组合以获得复合信号。 然后可以从复合信号中提取生理信号。 经处理的生理信号对应于所需的生理功能。
    • 7. 发明授权
    • Compensating for motion induced artifacts in a physiological signal extracted from a single video
    • 补偿从单个视频提取的生理信号中的运动诱发伪像
    • US09436984B2
    • 2016-09-06
    • US13923588
    • 2013-06-21
    • Xerox Corporation
    • Beilei XuLalit Keshav MesthaSurvi KyalHimanshu J. Madhu
    • G06K9/00G06T5/50G06T5/00
    • G06T5/50G06T5/003G06T2207/10016G06T2207/10024G06T2207/20201G06T2207/30088
    • What is disclosed is a system and method for compensating for motion induce artifacts in a physiological signal obtained from a video. In one embodiment, a video of a first and second region of interest of a subject being monitored for a desired physiological function is captured by a video device. The first region is an area of exposed skin wherein a desired signal corresponding to the physiological function can be registered. The second region is an area where movement is likely to induce motion artifacts into that signal. The video is processed to isolate pixels in the image frames associated with these regions. Pixels of the first region are processed to obtain a time-series signal. A physiological signal is extracted from the time-series signal. Pixels of the second region are analyzed to identify motion. The physiological signal is processed to compensate for the identified motion.
    • 所公开的是用于补偿从视频获得的生理信号中的运动诱发伪影的系统和方法。 在一个实施例中,由视频设备捕获被监视用于期望生理功能的被摄体的第一和第二感兴趣区域的视频。 第一区域是暴露皮肤的区域,其中可以登记对应于生理功能的期望信号。 第二区域是运动可能引起运动伪影成该信号的区域。 处理视频以隔离与这些区域相关联的图像帧中的像素。 处理第一区域的像素以获得时间序列信号。 从时间序列信号中提取生理信号。 分析第二区域的像素以识别运动。 处理生理信号以补偿所识别的运动。
    • 9. 发明授权
    • Increasing accuracy of a physiological signal obtained from a video of a subject
    • 从对象的视频获得的生理信号的精度提高
    • US09245338B2
    • 2016-01-26
    • US14281072
    • 2014-05-19
    • Xerox Corporation
    • Lalit Keshav MesthaSurvi KyalBeilei Xu
    • G06T7/00G06K9/00G06K9/20
    • G06T7/0016A61B5/0077G06K9/00362G06K9/0053G06K9/0055G06K9/2018G06K2009/00939G06T7/254G06T2207/10016G06T2207/10024G06T2207/10048G06T2207/30004G06T2207/30076
    • What is disclosed is a system and method for increasing the accuracy of physiological signals obtained from video of a subject being monitored for a desired physiological function. In one embodiment, image frames of a video are received. Successive batches of image frames are processed. For each batch, pixels associated with an exposed body region of the subject are isolated and processed to obtain a time-series signal. If movement occurred during capture of these image frames that is below a pre-defined threshold level then parameters of a predictive model are updated using this batch's time-series signal. Otherwise, the last updated predictive model is used to generate a predicted time-series signal for this batch. The time-series signal is fused with the predicted time-series signal to obtain a fused time-series signal. The time-series signal for each batch is processed to obtain a physiological signal for the subject corresponding to the physiological function.
    • 所公开的是用于增加从所监视的受试者的视频获得的生理信号的准确性的系统和方法,用于期望的生理功能。 在一个实施例中,接收视频的图像帧。 处理连续批量的图像帧。 对于每个批次,与对象的暴露的身体区域相关联的像素被隔离并被处理以获得时间序列信号。 如果在捕获低于预定阈值水平的图像帧的情况下发生移动,则使用该批次的时间序列信号来更新预测模型的参数。 否则,最后更新的预测模型用于生成该批次的预测时间序列信号。 时间序列信号与预测的时间序列信号融合以获得融合的时间序列信号。 处理每个批次的时间序列信号以获得与生理功能相对应的对象的生理信号。