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：US20150257661A1

公开(公告)日：2015-09-17

申请号：US14204397

申请日：2014-03-11

Applicant: Xerox Corporation

Inventor： Lalit Keshav MESTHA ,  Survi KYAL

IPC: A61B5/021 ,  A61B5/026 ,  A61B5/00 ,  A61B5/024

CPC classification number: A61B5/02125 ,  A61B5/0015 ,  A61B5/02427 ,  A61B5/0261

Abstract: What is disclosed is a system and method for determining the time it takes for an arterial pulse pressure wave to transit between a proximal and a distal point of a patient's body. In one embodiment, a signal is received from each of a first and second device worn circumferentially around a proximal and a distal region, respectively. The devices are worn on an area of exposed skin. Each of the devices comprises at least one emitter/detector pair fixed to an inner side of each device and has at least one detector paired to at least one illuminator. Each detector has at least one sensor that is sensitive to a wavelength band of light emitted by its illuminator. Each device generates signals that are proportional to an intensity of light emitted by an illuminator. The signals are analyzed to determine arterial pulse wave transit time between the proximal and distal regions.

Abstract translation: 公开的是用于确定动脉脉压压力波在患者身体的近端点和远端点之间转运所花费的时间的系统和方法。 在一个实施例中，从分别围绕近端区域和远端区域周向磨损的第一和第二设备中的每一个接收信号。 设备佩戴在暴露皮肤的一个区域。 每个装置包括固定到每个装置的内侧的至少一个发射器/检测器对，并且具有与至少一个照明器配对的至少一个检测器。 每个检测器具有至少一个对其照射器发出的光的波长带敏感的传感器。 每个设备产生与照明器发射的光的强度成比例的信号。 分析信号以确定近端和远端区域之间的动脉脉搏波传播时间。

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：US20150018693A1

公开(公告)日：2015-01-15

申请号：US13937740

申请日：2013-07-09

Applicant: XEROX CORPORATION

Inventor： Lalit Keshav MESTHA ,  Survi KYAL ,  Barry P. MANDEL ,  Peter Johan NYSTROM

IPC: A61B5/00 ,  A61B5/024

CPC classification number: A61B5/7282 ,  A61B5/0022 ,  A61B5/0024 ,  A61B5/02427 ,  A61B5/6831 ,  A61B5/746

Abstract: What is disclosed is a method for monitoring a subject for cardiac arrhythmia such as atrial fibrillation using an apparatus that can be comfortably worn by the subject around an area of exposed skin where a photoplethysmographic (PPG) signal can be registered. In one embodiment, the apparatus is a reflective or transmissive wrist-worn device with emitter/detector pairs fixed to an inner side of a band with at least one illuminator emitting source light at a specified wavelength band. The illuminator is paired to a respective photodetector comprising one or more sensors that are sensitive to a wavelength band of its paired illuminator. The photodetector measures intensity of sensed light emitted by a respective illuminator. The signal obtained by the sensors comprises a continuous PPG signal. The continuous PPG signal analyzed for peak-to-peak pulse points from which the existence of cardiac arrhythmia such as atrial fibrillation event can be determined.

Abstract translation: 所公开的是用于使用可以被注射在光体积描记术（PPM）信号的暴露皮肤区域周围的受试者舒适佩戴的装置来监测心律失常的受试者的心律失常的方法，例如心房颤动。 在一个实施例中，该装置是具有发射器/检测器对的反射或透射腕部装置，其固定到带的内侧，其中至少一个照明器发射指定波长带的光源。 照明器与包括对其成对照明器的波长带敏感的一个或多个传感器的相应光电检测器配对。 光电检测器测量由相应照明器发射的感测光的强度。 由传感器获得的信号包括连续的PPG信号。 分析连续的PPG信号，从中可以确定心律失常如心房颤动事件的存在的峰 - 峰脉冲点。

公开(公告)号：US20150018647A1

公开(公告)日：2015-01-15

申请号：US13937782

申请日：2013-07-09

Applicant: Xerox Corporation

Inventor： Barry P. MANDEL ,  Peter Johan NYSTROM ,  Lalit Keshav MESTHA

IPC: A61B5/1455 ,  A61B5/00

CPC classification number: A61B5/14552 ,  A61B5/0022 ,  A61B5/681 ,  A61B5/6814 ,  A61B5/6824 ,  A61B5/6825 ,  A61B5/6826 ,  A61B5/6828 ,  A61B5/6829 ,  A61B5/6831

Abstract: What is disclosed is a system and method for monitoring a subject of interest for functional blood oxygen saturation using an apparatus that can be comfortably worn by the subject around an area of exposed skin where a photoplethysmographic (PPG) signal can be registered. In one embodiment, the apparatus is a reflective or transmissive wrist-worn device with emitter/detector pairs fixed to an inner side of a band with at least two illuminators, each emitting source light at a different wavelength band. Each photodetector comprises sensors that are sensitive to a wavelength band of its respective illuminator. Each photodetector measures an intensity of sensed light emitted by a respective illuminator. The signal obtained by the sensors comprises a continuous PPG signal. The continuous PPG signal analyzed for functional blood oxygen saturation levels and communicated to a remote device. Various embodiments are disclosed.

Abstract translation: 所公开的是使用能够被注册的光电容积描记（PPG）信号的暴露皮肤区域周围的受试者舒适佩戴的装置来监测功能性血氧饱和度的感兴趣的受试者的系统和方法。 在一个实施例中，该装置是具有发射器/检测器对的反射或透射腕部装置，其具有固定到具有至少两个照明器的带的内侧，每个照射器发射不同波长带的光源。 每个光电检测器包括对其相​​应照明器的波长带敏感的传感器。 每个光电检测器测量由相应照明器发射的感测光的强度。 由传感器获得的信号包括连续的PPG信号。 持续的PPG信号分析了功能性血氧饱和度水平，并传达给远程设备。 公开了各种实施例。

公开(公告)号：US20150003738A1

公开(公告)日：2015-01-01

申请号：US14085143

申请日：2013-11-20

Applicant: Xerox Corporation

Inventor： Edgar A. BERNAL ,  Xuejin WEN ,  Wencheng WU ,  Lalit Keshav MESTHA

IPC: G06T11/00 ,  G06K9/32

CPC classification number: G06T11/003 ,  G06K9/2054 ,  G06K9/209 ,  G06K9/3233 ,  G06K9/6249 ,  H03M7/3062 ,  H04N19/60

Abstract: What is disclosed is a system and method which reconstructs an N-pixel image of a scene such that Q pixel locations associated with identified regions of interest in a scene have a higher image quality when rendered relative to other pixels in the image. Acquisition and adaptive-quality compression are performed simultaneously by semi-synchronously or asynchronously temporally modulating an ordered set of sampling functions used to spatially modulate a pattern of light. The teachings hereof improve compression efficiency of a compressed sensing framework while improving encoding efficiency with respect to traditional compressed sensing techniques.

Abstract translation: 所公开的是一种重建场景的N像素图像的系统和方法，使得当相对于图像中的其他像素渲染时，与场景中的识别的感兴趣区域相关联的Q个像素位置具有较高的图像质量。 通过半同步或异步时间调制用于空间调制光模式的有序集合采样功能同时执行采集和自适应质量压缩。 本发明的教导提高了压缩感测框架的压缩效率，同时提高了传统压缩感测技术的编码效率。

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：US20140355820A1

公开(公告)日：2014-12-04

申请号：US13905788

申请日：2013-05-30

Applicant: XEROX CORPORATION

Inventor： Wencheng WU ,  Edgar A. BERNAL ,  Lalit Keshav MESTHA ,  Paul R. AUSTIN

IPC: G06T7/00

CPC classification number: G06T7/004 ,  G06T7/75 ,  G06T2207/30244

Abstract: What is disclosed a system and method for estimating a position (or pose) of a camera relative to a surface upon which an object rests in an image captured by that camera such that a volume can be estimated for that object. In one embodiment, a matrix K is determined from parameters intrinsic to a camera used to capture image. An amount of a camera translation T is determined with respect to a set of real-world coordinates in (X,Y,Z). An amount of a camera rotation matrix R is determined from camera angles measured with respect to the real-world coordinates. A distance Zc of the camera at location (i,j) can then be estimated. A volume of the object in an image of that object can be estimated from the camera pose.

Abstract translation: 公开了一种用于估计相机相对于表面的位置（或姿态）的系统和方法，在该表面上物体停留在由该相机拍摄的图像中，使得可以为该对象估计音量。 在一个实施例中，矩阵K由用于捕获图像的相机固有的参数确定。 相对于（X，Y，Z）中的一组真实世界坐标来确定相机平移度T的量。 从相对于真实世界坐标测量的相机角度确定相机旋转矩阵R的量。 然后可以估计位置（i，j）处的摄像机的距离Zc。 可以从相机姿态估计该物体的图像中的物体的体积。