公开(公告)号：US20150172623A1

公开(公告)日：2015-06-18

申请号：US14107534

申请日：2013-12-16

申请人： Xerox Corporation

发明人： Wencheng WU ,  Edgar A. BERNAL ,  Himanshu J. MADHU ,  Michael C. MONGEON

IPC分类号： H04N13/00

CPC分类号： H04N13/139 ,  H04N13/111 ,  H04N13/128 ,  H04N2213/003

摘要： What is disclosed is a system and method for enhancing a spatio-temporal resolution of a depth data stream. In one embodiment, time-sequential reflectance frames and time-sequential depth frames of a scene are received. If a temporal resolution of the reflectance frames is greater than the depth frames then a new depth frame is generated based on correlations determined between motion patterns in the sequence of reflectance frames and the sequence of depth frames. The new depth frame is inserted into the sequence of depth frames at a selected time point. If a spatial resolution of the reflectance frames is greater than the depth frames then the spatial resolution of a selected depth frame is enhanced by generating new pixel depth values which are added to the selected depth frame. The spatially enhanced depth frame is then inserted back into the sequence of depth frames.

摘要翻译： 公开的是用于增强深度数据流的时空分辨率的系统和方法。 在一个实施例中，接收场景的时序反射帧和时间顺序深度帧。 如果反射率帧的时间分辨率大于深度帧，则基于在反射帧序列中的运动模式和深度帧序列之间确定的相关性来生成新的深度帧。 在所选择的时间点将新的深度帧插入到深度帧序列中。 如果反射率帧的空间分辨率大于深度帧，则通过生成添加到所选择的深度帧的新像素深度值来增强所选深度帧的空间分辨率。 然后将空间增强的深度帧插入到深度帧序列中。

公开(公告)号：US20170055920A1

公开(公告)日：2017-03-02

申请号：US14837898

申请日：2015-08-27

申请人： Xerox Corporation

发明人： Lalit Keshav MESTHA ,  Sanjay BHARADWAJ ,  Prathosh A. PRASAD ,  Tejaskumar D. BENGALI ,  Himanshu J. MADHU ,  Suresh KUPPUSWAMY

IPC分类号： A61B5/00 ,  A61B5/113 ,  A61B5/11

CPC分类号： A61B5/7285 ,  A61B5/0013 ,  A61B5/0075 ,  A61B5/0077 ,  A61B5/1128 ,  A61B5/113 ,  A61B5/1135 ,  A61B5/4836 ,  A61B5/725 ,  A61B5/7264 ,  A61B5/7292 ,  A61B6/00 ,  A61B6/025 ,  A61B6/032 ,  A61B6/037 ,  A61B6/541 ,  A61B2576/02 ,  G06T7/246 ,  G06T2207/20076 ,  G06T2207/30004

摘要： What is disclosed is a system and method for generating a respiration gating signal from a video of a subject for gating diagnostic imaging and therapeutic delivery applications which require respiration phase and/or respiration amplitude gating. One embodiment involves receiving a video of a subject and generating a plurality of time-series signals from the video image frames. A set of features are extracted from the time-series signals and multi-dimensional feature vectors are formed. The feature vectors are clustered. Time-series signals corresponding in each of the clusters are averaged in a temporal direction to obtain a representative signal for each cluster. One cluster is selected and a respiration gating signal is generated from that cluster's representative signal. Thereafter, the respiration gating signal is used to gate diagnostic imaging and therapeutic delivery applications which requires gating based on a threshold set with respect to either respiration phase or respiration amplitude.

摘要翻译： 公开的是用于从需要呼吸相位和/或呼吸振幅选通的门诊诊断成像和治疗递送应用的对象视频产生呼吸门控信号的系统和方法。 一个实施例涉及接收对象的视频并从视频图像帧产生多个时间序列信号。 从时间序列信号中提取一组特征，形成多维特征向量。 特征向量是聚类的。 在每个簇中对应的时间序列信号在时间方向上被平均以获得每个簇的代表信号。 选择一个群集，并从该群集的代表信号中生成呼吸门控信号。 此后，呼吸门控信号用于门诊诊断成像和治疗递送应用，其需要基于相对于呼吸相位或呼吸振幅设定的阈值进行门控。

公开(公告)号：US20140378842A1

公开(公告)日：2014-12-25

申请号：US13921939

申请日：2013-06-19

申请人： Xerox Corporation

发明人： Beilei XU ,  Lalit Keshav MESTHA ,  Survi KYAL ,  Himanshu J. MADHU

IPC分类号： A61B5/00

CPC分类号： A61B5/0077 ,  A61B5/0205 ,  A61B5/7221 ,  A61B5/7278 ,  A61B2562/04 ,  A61B2576/00

摘要： 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.

摘要翻译： 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。

公开(公告)号：US20150094606A1

公开(公告)日：2015-04-02

申请号：US14044043

申请日：2013-10-02

申请人： Xerox Corporation

发明人： Lalit Keshav MESTHA ,  Eribaweimon SHILLA ,  Edgar A. BERNAL ,  Graham S. PENNINGTON ,  Himanshu J. MADHU

IPC分类号： A61B5/11 ,  A61B5/00 ,  A61B5/113

CPC分类号： A61B5/4818 ,  A61B5/0013 ,  A61B5/0022 ,  A61B5/0075 ,  A61B5/0077 ,  A61B5/1073 ,  A61B5/1128 ,  A61B5/113 ,  A61B5/6898 ,  A61B5/7203 ,  A61B5/7246 ,  A61B5/7264 ,  A61B5/7282 ,  A61B5/742 ,  A61B5/746 ,  A61B5/747 ,  A61B2576/00

摘要： What is disclosed is a system and method for identifying a patient's breathing pattern for respiratory function assessment without contact and with a depth-capable imaging system. In one embodiment, a time-varying sequence of depth maps are received of a target region of a subject of interest over a period of inspiration and expiration. Once received, the depth maps are processed to obtain a breathing signal for the subject. The subject's breathing signal comprises a temporal sequence of instantaneous volumes. One or more segments of the subject's breathing signal are then compared against one or more reference breathing signals each associated with a known pattern of breathing. As a result of the comparison, a breathing pattern for the subject is identified. The identified breathing pattern is then used to assess the subject's respiratory function. The teachings hereof find their uses in an array of diverse medical applications. Various embodiments are disclosed.

公开(公告)号：US20150073281A1

公开(公告)日：2015-03-12

申请号：US14023654

申请日：2013-09-11

申请人： XEROX CORPORATION

发明人： Lalit Keshav MESTHA ,  Eribaweimon SHILLA ,  Edgar A. BERNAL ,  Himanshu J. MADHU

IPC分类号： A61B5/087 ,  A61B5/08

CPC分类号： A61B5/0806 ,  A61B5/0077 ,  A61B5/087 ,  A61B5/091 ,  A61B5/1127 ,  A61B5/7239

摘要： What is disclosed is a system and method for generating a flow-volume loop for respiratory function assessment of a subject of interest in a non-contact, remote sensing environment. In one embodiment, a time-varying sequence of depth maps of a target region of a subject of interest being monitored for respiratory function is received. The depth maps are of that target region over a period of inspiration and expiration. The depth maps are processed to obtain a volume signal comprising a temporal sequence of instantaneous volumes. The time-varying volume signal is processed to obtain a flow-volume loop. Changes in a contour of the flow-volume loop are used to assess the subject's respiratory function. The teachings hereof find their uses in a wide array of medical applications where it is desired to monitor respiratory function of patients such as elderly patients, chronically ill patients with respiratory diseases and premature babies.

摘要翻译： 公开的是用于在非接触式遥感环境中产生感兴趣对象的呼吸功能评估的流量回路的系统和方法。 在一个实施例中，接收针对呼吸功能监视的感兴趣对象的目标区域的深度图的时变序列。 深度图是在灵感和期满期间的目标区域。 处理深度图以获得包括瞬时体积的时间序列的体积信号。 处理时变音量信号以获得流量环路。 流量循环轮廓的变化用于评估受试者的呼吸功能。 这些教导在各种医疗应用中发现其用途，其中希望监测患者的呼吸功能，例如老年患者，长期患有呼吸系统疾病的患者和早产儿。

公开(公告)号：US20170169307A1

公开(公告)日：2017-06-15

申请号：US14969147

申请日：2015-12-15

申请人： Xerox Corporation

发明人： Prathosh A. PRASAD ,  Lalit Keshav MESTHA ,  Himanshu J. MADHU

IPC分类号： G06K9/46 ,  A61B5/08 ,  A61B5/11 ,  G06K9/00 ,  A61B5/113 ,  A61B5/00 ,  G06K9/40

CPC分类号： G06K9/4647 ,  A61B5/0013 ,  A61B5/0077 ,  A61B5/08 ,  A61B5/1128 ,  A61B5/1135 ,  A61B2576/00 ,  G06K9/0053 ,  G06K9/00751 ,  G06K9/40 ,  G06K9/4661 ,  G06K2209/05 ,  G06T7/0012 ,  G06T7/20

摘要： A video is received of a region of a subject where a signal corresponding to respiratory function can be registered by a video device. Pixels in the region in each of the image frames are processed to identify a respiratory pattern with peak/valley pairs. A peak/valley pair of interest is selected. An array of optical flow vectors is determined between a window of groups of pixel locations in a reference image frame corresponding to a peak of the pair/valley pair and a window in each of a number of image frames corresponding to the respiratory signal between the peak and ending at a valley point. Optical flow vectors have a direction and a magnitude. A ratio is determined between upwardly pointing optical flow vectors and downwardly pointing optical flow vectors. Based on the ratio, a determination is made whether the respiration phase for that peak/valley pair is inspiration or expiration.

公开(公告)号：US20140376789A1

公开(公告)日：2014-12-25

申请号：US13923612

申请日：2013-06-21

申请人： Xerox Corporation

发明人： Beilei XU ,  Lalit Keshav MESTHA ,  Survi KYAL ,  Himanshu J. MADHU

IPC分类号： G06T7/00 ,  G06T5/00

CPC分类号： G06T5/003 ,  G06T5/50 ,  G06T7/0016 ,  G06T2207/10016 ,  G06T2207/20201 ,  G06T2207/30088

摘要： What is disclosed is a system for compensating for motion induced artifacts in a physiological signal obtained from multiple videos of a first and second region of interest a subject being monitored for a desired physiological function. At least one of the videos being of the first region and at least one of the videos being of the second region. The first region being at least one area of exposed skin where a desired signal corresponding to the physiological function can be registered by a video imaging device. The second region being an area where a movement by the subject is likely to induce motion artifacts into the signal. The videos are processed to isolate pixels associated with the first and second regions. Processed pixels of the isolated first regions to obtain a composite time-series signal. From the composite signal, a physiological signal corresponding to the physiological function is extracted.

摘要翻译： 所公开的是一种用于补偿从受感染的第一和第二感兴趣区域的多个视频获得的生理信号中的运动诱发伪影的系统，该对象被监视为期望的生理功能。 至少一个视频是第一区域，并且至少一个视频是第二区域。 第一区域是暴露皮肤的至少一个区域，其中对应于生理功能的期望信号可由视频成像装置登记。 第二区域是被摄体的移动可能引起运动伪像进入信号的区域。 处理视频以分离与第一和第二区域相关联的像素。 隔离的第一区域的处理像素以获得复合时间序列信号。 从复合信号中提取与生理功能对应的生理信号。

公开(公告)号：US20140376788A1

公开(公告)日：2014-12-25

申请号：US13923588

申请日：2013-06-21

申请人： Xerox Corporation

发明人： Beilei XU ,  Lalit Keshav MESTHA ,  Survi KYAL ,  Himanshu J. MADHU

IPC分类号： G06T5/00

CPC分类号： G06T5/50 ,  G06T5/003 ,  G06T2207/10016 ,  G06T2207/10024 ,  G06T2207/20201 ,  G06T2207/30088

摘要： 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.

摘要翻译： 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。

公开(公告)号：US20160371833A1

公开(公告)日：2016-12-22

申请号：US14742233

申请日：2015-06-17

申请人： Xerox Corporation

发明人： Prathosh A. PRASAD ,  Lalit Keshav MESTHA ,  Himanshu J. MADHU

IPC分类号： G06T7/00 ,  A61B5/11 ,  A61B5/113 ,  G06T5/00 ,  G06K9/48 ,  G06K9/62 ,  G06K9/20 ,  G06T5/20 ,  A61B5/08 ,  A61B5/00

CPC分类号： G06T7/0012 ,  A61B5/0013 ,  A61B5/0816 ,  A61B5/0826 ,  A61B5/1128 ,  A61B5/1135 ,  A61B5/4818 ,  A61B5/746 ,  G06K9/00362 ,  G06K9/2054 ,  G06K9/481 ,  G06K9/6223 ,  G06T5/002 ,  G06T5/20 ,  G06T5/50 ,  G06T7/0016 ,  G06T2207/10016 ,  G06T2207/30061 ,  G06T2207/30076

摘要： What is disclosed is a system and method for determining a subject's respiratory pattern from a video of that subject. One embodiment involves receiving a video comprising N≧2 time-sequential image frames of a region of interest (ROI) of a subject where a signal corresponding to the subject's respiratory function can be registered by at least one imaging channel of a video imaging device. The ROI comprises P pixels. Time-series signals of duration N are generated from pixels isolated in the ROI. Features are extracted from the time-series signals and formed into P-number of M-dimensional vectors. The feature vectors are clustered into K clusters. The time-series signals corresponding to pixels represented by the feature vectors in each cluster are averaged along a temporal direction to obtain a representative signal for each cluster. One of the clusters is selected. A respiratory pattern is determined for the subject based on the representative signal.

摘要翻译： 公开的是用于从该受试者的视频确定受检者的呼吸模式的系统和方法。 一个实施例涉及接收包括受检者的感兴趣区域（ROI）的N≥2个时间顺序的图像帧的视频，其中与被摄体的呼吸功能相对应的信号可由视频成像设备的至少一个成像通道注册。 ROI包括P像素。 持续时间N的时间序列信号是从ROI中分离的像素生成的。 从时间序列信号中提取特征，形成M维向量的P数。 特征向量聚类成K个簇。 对应于每个簇中由特征向量表示的像素的时间序列信号沿着时间方向被平均，以获得每个簇的代表信号。 选择其中一个群集。 基于代表性信号确定对象的呼吸模式。

公开(公告)号：US20150245787A1

公开(公告)日：2015-09-03

申请号：US14195111

申请日：2014-03-03

申请人： Xerox Corporation

发明人： Survi KYAL ,  Lalit Keshav MESTHA ,  Himanshu J. MADHU

IPC分类号： A61B5/08 ,  H04N5/357 ,  A61B5/00 ,  H04N7/18

CPC分类号： A61B5/1135 ,  A61B5/1128

摘要： What is disclosed is a system and method for processing a video for respiratory function analysis. In one embodiment, a video is received of a region of the subject's body where a time-varying signal corresponding to the subject's respiration can be registered by the video camera. Pixels in a first batch of frames are processed to obtain a time-series signal which is filtered using a band-pass filter with a low and high cutoff frequency fL and fH, where fL and fH are a function of the subject's tidal breathing. The filtered time-series signal is analyzed to identify a next low and high cutoff frequency f′L and F′H, where fL

摘要翻译： 公开的是用于处理用于呼吸功能分析的视频的系统和方法。 在一个实施例中，接收到被摄体的身体的区域的视频，其中对应于被摄体的呼吸的时变信号可由摄像机注册。 处理第一批帧中的像素以获得使用具有低和高截止频率fL和fH的带通滤波器进行滤波的时间序列信号，其中fL和fH是受试者的潮气呼吸的函数。 分析滤波后的时间序列信号，以识别下一个低和高截止频率f'L和F'H，其中fL