公开(公告)号：US20140378842A1

公开(公告)日：2014-12-25

申请号：US13921939

申请日：2013-06-19

Applicant: Xerox Corporation

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

IPC: A61B5/00

CPC classification number: A61B5/0077 ,  A61B5/0205 ,  A61B5/7221 ,  A61B5/7278 ,  A61B2562/04 ,  A61B2576/00

Abstract: 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.

Abstract translation: 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：US20160012602A1

公开(公告)日：2016-01-14

申请号：US14858564

申请日：2015-09-18

Applicant: Xerox Corporation

Inventor： Beilei XU ,  Lalit Keshav MESTHA ,  Edgar A. BERNAL

IPC: G06T7/00 ,  G01B11/25 ,  G06K9/46 ,  G06K9/36

CPC classification number: G06T7/0075 ,  G01B11/25 ,  G06K9/36 ,  G06K9/46 ,  G06T7/521 ,  G06T7/55 ,  G06T7/593 ,  G06T2207/10012 ,  G06T2207/20104 ,  G06T2207/30076

Abstract: What is disclosed is system and method for contemporaneously reconstructing images of a scene illuminated with unstructured and structured illumination sources. In one embodiment, the system comprises capturing a first 2D image containing energy reflected from a scene being illuminated by a structured illumination source and a second 2D image containing energy reflected from the scene being illuminated by an unstructured illumination source. A controller effectuates a manipulation of the structured and unstructured illumination sources during capture of the video. A processor is configured to execute machine readable program instructions enabling the controller to manipulate the illumination sources, and for effectuating the contemporaneous reconstruction of a 2D intensity map of the scene using the second 2D image and of a 3D surface map of the scene using the first 2D image. The reconstruction is effectuated by manipulating the illumination sources.

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。

公开(公告)号：US20150206301A1

公开(公告)日：2015-07-23

申请号：US14161023

申请日：2014-01-22

Applicant: Xerox Corporation

Inventor： Lalit Keshav MESTHA ,  Beilei XU

IPC: G06T7/00 ,  G01J5/08 ,  G01J5/10

CPC classification number: G06T7/0012 ,  G01J5/0025 ,  G01J5/08 ,  G01J5/10 ,  G01J5/60 ,  G01J2005/0077 ,  G01J2005/0085 ,  G06T2207/10048 ,  G06T2207/30088 ,  G06T2207/30104

Abstract: What is disclosed is a system and method for assessing peripheral vascular disease from a thermal image captured using a thermal imaging system. In one embodiment the present method involves the following. First, a thermal image is received of a region of exposed skin of a peripheral body part of a subject being monitored for PVD. The thermal image was acquired by a thermal imaging system. Pixels in the thermal image each have a corresponding temperature value. The thermal image is analyzed to stratify the peripheral body part into a plurality of skin surface regions. A skin surface temperature for each respective skin surface region is identified based on pixels in the thermal image associated with those regions. The temperatures are then extracted such that a progression of temperatures can be ascertained. A method for forecasting the progression for future times is also disclosed.

Abstract translation: 公开的是一种用于使用热成像系统捕获的热图像来评估外周血管疾病的系统和方法。 在一个实施例中，本方法涉及以下。 首先，接收被监测用于PVD的被摄体的外周身体部分的暴露皮肤的区域的热图像。 热图像由热成像系统获得。 热像中的像素都具有相应的温度值。 分析热图像以将周边主体部分分层成多个皮肤表面区域。 基于与这些区域相关联的热图像中的像素来识别每个相应皮肤表面区域的皮肤表面温度。 然后提取温度使得可以确定温度的进展。 还公开了一种预测未来时间进展的方法。

公开(公告)号：US20140376789A1

公开(公告)日：2014-12-25

申请号：US13923612

申请日：2013-06-21

Applicant: Xerox Corporation

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

IPC: G06T7/00 ,  G06T5/00

CPC classification number: G06T5/003 ,  G06T5/50 ,  G06T7/0016 ,  G06T2207/10016 ,  G06T2207/20201 ,  G06T2207/30088

Abstract: 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.

Abstract translation: 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

Applicant: Xerox Corporation

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

IPC: G06T5/00

CPC classification number: G06T5/50 ,  G06T5/003 ,  G06T2207/10016 ,  G06T2207/10024 ,  G06T2207/20201 ,  G06T2207/30088

Abstract: 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.

Abstract translation: 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：US20150363928A1

公开(公告)日：2015-12-17

申请号：US14306817

申请日：2014-06-17

Applicant: Xerox Corporation

Inventor： Lalit Keshav MESTHA ,  Beilei XU ,  Rakesh Suresh KULKARNI

IPC: G06T7/00 ,  G01J5/08 ,  G06K9/46 ,  G06K9/52 ,  H04N5/33 ,  G01J5/10 ,  H04N5/30

CPC classification number: H04N5/33 ,  A61B5/0077 ,  A61B5/01 ,  A61B5/015 ,  G01J5/0025 ,  G01J5/025 ,  G01J5/089 ,  G01J5/10 ,  G01J2005/0077 ,  G06T7/0016 ,  G06T2207/10016 ,  G06T2207/10048 ,  G06T2207/30076 ,  G06T2207/30088 ,  H04N5/23229 ,  H04N5/30

Abstract: What is disclosed is a system and method for detecting febrile seizure using a thermal video camera. In one embodiment, a video is received comprising time-sequential thermal images of a subject. The video is acquired of the subject in real-time using a thermal video system. Each thermal image comprises a plurality of pixels with an intensity value of each pixel corresponding to a temperature. The thermal images are processed to determine an occurrence of a febrile seizure. The processing involves identifying a region of interest in the thermal image and determining a temperature for the region of interest based on values of the pixels isolated in that region of interest. Thereafter, a rate of change of temperatures is obtained for the subject in real-time on a per-frame basis. If the rate of change is determined to have exceeded a pre-defined threshold level, then the subject is having a febrile seizure.

Abstract translation: 公开的是使用热摄像机检测发热性惊厥的系统和方法。 在一个实施例中，接收包括被摄体的时间顺序的热图像的视频。 使用热视频系统实时拍摄该主题的视频。 每个热图像包括具有对应于温度的每个像素的强度值的多个像素。 热图像被处理以确定发热发作。 处理涉及识别热图像中的感兴趣区域，并且基于在该感兴趣区域中分离的像素的值来确定感兴趣区域的温度。 此后，以每帧为基础实时获得对象的温度变化率。 如果变化率被确定为已经超过预定义的阈值水平，则受试者具有发热性发作。

公开(公告)号：US20150317806A1

公开(公告)日：2015-11-05

申请号：US14753238

申请日：2015-06-29

Applicant: Xerox Corporation

Inventor： Edgar A. BERNAL ,  Beilei XU ,  Lalit Keshav MESTHA

IPC: G06T11/00 ,  G06T7/00

CPC classification number: G06T11/006 ,  G06T1/0007 ,  G06T7/11 ,  G06T2207/10004 ,  G06T2207/20052 ,  H04N5/225

Abstract: A method for reconstructing an image of a scene captured using a compressed sensing device. A mask is received which identifies at least one region of interest in an image of a scene. Measurements are then obtained of the scene using a compressed sensing device comprising, at least in part, a spatial light modulator configuring a plurality of spatial patterns according to a set of basis functions each having a different spatial resolution. A spatial resolution is adaptively modified according to the mask. Each pattern focuses incoming light of the scene onto a detector which samples sequential measurements of light. These measurements comprise a sequence of projection coefficients corresponding to the scene. Thereafter, an appearance of the scene is reconstructed utilizing a compressed sensing framework which reconstructs the image from the sequence of projection coefficients.

Abstract translation: 一种用于重构使用压缩感测装置拍摄的场景的图像的方法。 接收到掩模，其识别场景的图像中的至少一个感兴趣区域。 然后使用压缩感测装置获得场景的测量，所述压缩感测装置至少部分地包括根据每个具有不同空间分辨率的基础函数的集合来配置多个空间模式的空间光调制器。 根据掩模自适应地修改空间分辨率。 每个图案将场景的入射光聚焦到对光进行顺序测量的检测器上。 这些测量包括对应于场景的一系列投影系数。 此后，利用从投影系数序列重建图像的压缩感测框架来重建场景的外观。

公开(公告)号：US20150196269A1

公开(公告)日：2015-07-16

申请号：US14156108

申请日：2014-01-15

Applicant: Xerox Corporation

Inventor： Vaibhav RAJAN ,  Om Dadaji DESHMUKH ,  Lalit Keshav MESTHA ,  Leslie Edward S. ,  Survi KYAL ,  Beilei XU ,  Nischal Murthy PIRATLA

IPC: A61B7/00 ,  A61B7/04

CPC classification number: A61B7/003 ,  A61B5/0823 ,  A61B7/04

Abstract: What is disclosed is a system and method for determining whether a patient has an acute respiratory infection. In one embodiment, the present method involves using a handheld device to acquire an audio signal of a sound made by a patient coughing. The audio signal is then communicated, by the handheld device, to a remote computing device. Upon receiving the audio signals, signal are repeatedly retrieved from a database of signals associated with different severities of various acute respiratory conditions. A comparison is made between the received audio signal and the retrieved signals. As a result of the comparison, a determination is made whether the patient has an acute respiratory infection. An audio playback device may be employed for playing the audio signal so that a medical professional can listen to that audio signal and facilitate the determination. Various embodiments are disclosed.

Abstract translation: 公开的是用于确定患者是否具有急性呼吸道感染的系统和方法。 在一个实施例中，本方法涉及使用手持设备来获取由患者咳嗽产生的声音的音频信号。 然后，音频信号由手持设备传送到远程计算设备。 在接收到音频信号时，从与各种急性呼吸状况的不同严重程度相关联的信号的数据库重复地检索信号。 在接收到的音频信号和检索到的信号之间进行比较。 作为比较的结果，确定患者是否具有急性呼吸道感染。 可以使用音频播放装置来播放音频信号，使得医疗专业人员可以收听该音频信号并便于确定。 公开了各种实施例。

公开(公告)号：US20140323888A1

公开(公告)日：2014-10-30

申请号：US13871766

申请日：2013-04-26

Applicant: XEROX CORPORATION

Inventor： Survi KYAL ,  Lalit Keshav MESTHA ,  Beilei XU

IPC: A61B5/024 ,  G06T7/00

CPC classification number: A61B5/02405 ,  A61B5/021 ,  A61B5/02416 ,  A61B5/02444 ,  A61B5/0295 ,  A61B5/7225

Abstract: What is disclosed is a system and method for extracting photoplethysmographic (PPG) signal (i.e., a cardiac signal) on a continuous basis from a time-series signals obtained from video images captured of a subject being monitored for cardiac function in a non-contact remote sensing environment involves the following. First, a time-series signal obtained from video images captured of a region of exposed skin where a photoplethysmographic (PPG) signal of a subject of interest can be registered. A sliding window is then used to define consecutive sequential segments of the time-series signal for processing. Each of the consecutive time-series signal segments is detrended such that low frequency variations and non-stationary components are removed. The detrended signals are processed to obtain, for each segment, a PPG signal. The PPG signal segments are then stitched together using a stitching method, as disclosed herein, to obtain a continuous PPG signal for the subject.

Abstract translation: 公开的是一种系统和方法，用于连续地从从非接触的心脏功能监测对象被摄取的视频图像获得的时间序列信号中连续提取光电体积描记（即心脏信号） 遥感环境涉及以下几个方面。 首先，可以登记拍摄感兴趣对象的光电体描记（PPG）信号的暴露皮肤区域的视频图像获得的时间序列信号。 然后使用滑动窗口来定义用于处理的时间序列信号的连续的顺序段。 每个连续的时间序列信号段被去除，使得低频变化和非固定分量被去除。 处理去信号的信号，以获得每个段的PPG信号。 然后如本文所公开的，使用缝合方法将PPG信号段缝合在一起，以获得该对象的连续PPG信号。