公开(公告)号：US20150094606A1

公开(公告)日：2015-04-02

申请号：US14044043

申请日：2013-10-02

Applicant: Xerox Corporation

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

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

CPC classification number: 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

Abstract: 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：US20150124067A1

公开(公告)日：2015-05-07

申请号：US14071355

申请日：2013-11-04

Applicant: Xerox Corporation

Inventor： Raja BALA ,  Beilei XU ,  Lalit Keshav MESTHA ,  Graham S. PENNINGTON ,  Stuart A. SCHWEID

IPC: H04N5/235 ,  H04N7/18 ,  G06T7/00 ,  G06K9/00

CPC classification number: H04N5/2354 ,  A61B5/0077 ,  A61B5/02 ,  A61B5/0205 ,  A61B5/02427 ,  A61B5/02433 ,  A61B5/0803 ,  A61B5/14552 ,  A61B5/6898 ,  G06K9/2027 ,  H04N5/2256

Abstract: What is disclosed is a handheld device having at least one illuminator for projecting source light and a video camera for capturing images of a region of interest of a subject being monitored for a desired physiological function. The handheld device is positioned such that light reflected off the subject's region of interest is received by a sensor. A determination is then made as to how a physiological signal extracted from video images captured by the video camera can be improved by an adjustment to the illuminator with respect to intensity, spectrally, spatially, and/or temporally, to improve accuracy of a measurement of a desired physiological function. The illuminator is adjusted and video images of a region of interest are captured by the video camera and processed to extract a physiological signal corresponding to that physiological function. That signal is used to monitor the desired physiological function. Various embodiments are disclosed.

Abstract translation: 所公开的是具有用于投射源光的至少一个照明器和用于捕获被监测的对象的感兴趣区域的图像用于所需生理功能的摄像机的手持设备。 手持设备被定位成使得从感兴趣区域反射的光被传感器接收。 然后，确定如何通过相对于强度，光谱，空间和/或时间上对照明器的调整来改善由摄像机拍摄的视频图像提取的生理信号，以提高测量的精度 所需的生理功能。 照明器被调整，并且摄像机捕获感兴趣区域的视频图像，并进行处理以提取对应于该生理功能的生理信号。 该信号用于监测所需的生理功能。 公开了各种实施例。

公开(公告)号：US20150262338A1

公开(公告)日：2015-09-17

申请号：US14211455

申请日：2014-03-14

Applicant: Xerox Corporation

Inventor： Beilei XU ,  Survi KYAL ,  Lalit Keshav MESTHA ,  Graham S. PENNINGTON

IPC: G06T5/00

CPC classification number: G06T7/20 ,  G06T2207/10016 ,  G06T2207/10024 ,  G06T2207/30076 ,  G06T2207/30088

Abstract: What is disclosed is a system and method for compensating for motion during processing of a video of a subject being monitored for physiological function assessment. In one embodiment, image frames are received. Successive batches of N video frames are processed to isolate pixels associated with a body region of the subject where a physiological signal is registered by the camera. The pixels are processed to obtain a time-series signal for each batch. A determination is made whether movement during video acquisition of this batch of image frames exceeds a threshold level. If so then a size N of the next batch of image frames is changed to: N=N+M1, where N+M1≦Nm. Otherwise, a size N of a next batch is changed to: N=N−M2, where N−M2≧Nmin. Thereafter, processing repeats in a real-time continuous manner as the next batch of the N image frames is received. Various embodiments are disclosed.

Abstract translation: 所公开的是用于在处理被监视的受试者的视频的处理期间补偿运动以进行生理功能评估的系统和方法。 在一个实施例中，接收图像帧。 处理N个视频帧的连续批次以分离与由摄像机登记生理信号的被摄体的身体区域相关联的像素。 处理像素以获得每个批次的时间序列信号。 确定在该批次的图像帧的视频采集期间的移动是否超过阈值水平。 如果是，则下一批图像帧的大小N被改变为：N = N + M1，其中N + M1＆nlE; Nm。 否则，下一批次的大小N变为：N = N-M2，其中N-M2≥Nmin。 此后，当接收到下一批N个图像帧时，处理以实时连续的方式重复。 公开了各种实施例。