公开(公告)号：US20130079649A1

公开(公告)日：2013-03-28

申请号：US13247683

申请日：2011-09-28

申请人： Lalit Keshav MESTHA ,  Survi KYAL ,  Gill Rafael TSOURI ,  Sohail A. DIANAT ,  Beilei XU

发明人： Lalit Keshav MESTHA ,  Survi KYAL ,  Gill Rafael TSOURI ,  Sohail A. DIANAT ,  Beilei XU

IPC分类号： A61B5/02

CPC分类号： A61B5/0022 ,  A61B5/0077 ,  A61B5/024 ,  A61B2576/00 ,  G01J5/026 ,  G01J5/089 ,  G06F19/00 ,  G16H40/67

摘要： What is disclosed is a system and method for recovering a patient's cardiac pulse rate from a sequence of video images recording of that patient. In one embodiment, a reference signal of a particular frequency is generated at predetermined frequency intervals and a constrained source separation is performed on the source data to obtain an estimation of the source signal intended to be recovered. The reference signal is updated and constrained source separation is again performed. These operations are repeated for all frequencies of the reference signal. The frequency at which a minimum error is achieved is determined to be the subject's recovered cardiac pulse frequency. In such a manner, the source signal is extracted and recovered reliably from captured multi-channel RGB signals or multispectral signals. The teachings hereof find their uses in a variety of medical solutions including various military, security and telemedicine applications. Various embodiments are disclosed.

摘要翻译： 所公开的是用于从记录该患者的视频图像的序列中恢复患者心脏脉搏率的系统和方法。 在一个实施例中，以预定的频率间隔产生特定频率的参考信号，并且对源数据执行受限的源分离以获得旨在被恢复的源信号的估计。 更新参考信号并再次执行约束源分离。 对参考信号的所有频率重复这些操作。 实现最小误差的频率被确定为受试者的恢复心脏脉搏频率。 以这种方式，从捕获的多通道RGB信号或多光谱信号可靠地提取和恢复源信号。 其教学方法可用于各种医疗解决方案，包括各种军事，安全和远程医疗应用。 公开了各种实施例。

公开(公告)号：US20130345568A1

公开(公告)日：2013-12-26

申请号：US13532057

申请日：2012-06-25

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

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

IPC分类号： A61B5/024 ,  A61B6/00

CPC分类号： A61B5/02405 ,  A61B5/0004 ,  A61B5/02416 ,  A61B5/7235 ,  A61B2576/00

摘要： What is disclosed is a video-based system and method for estimating heart rate variability from time-series signals generated from video images captured of a subject of interest being monitored for cardiac function. In a manner more fully disclosed herein, low frequency and high frequency components are extracted from a time-series signal obtained by processing a video of the subject being monitored. A ratio of the low and high frequency of the integrated power spectrum within these components is computed. Analysis of the dynamics of this ratio over time is used to estimate heart rate variability. The teachings hereof can be used in a continuous monitoring mode with a relatively high degree of measurement accuracy and find their uses in a variety of diverse applications such as, for instance, emergency rooms, cardiac intensive care units, neonatal intensive care units, and various telemedicine applications.

摘要翻译： 所公开的是一种基于视频的系统和方法，用于从由心脏功能监测的感兴趣对象的视频图像产生的时间序列信号估计心率变异性。 以这里更完全公开的方式，从通过处理被监视对象的视频获得的时间序列信号中提取低频和高频分量。 计算这些分量内的综合功率谱的低频和高频比。 分析这个比率随时间的动力学被用于估计心率变异性。 其教导可以以相对较高的测量精度的连续监测模式使用，并且可以在各种各样的应用中使用，例如急诊室，心脏重症监护病房，新生儿重症监护病房和各种各样的 远程医疗应用。

公开(公告)号：US20130343614A1

公开(公告)日：2013-12-26

申请号：US13528307

申请日：2012-06-20

申请人： Survi KYAL ,  Lalit Keshav MESTHA ,  Beilei XU

发明人： Survi KYAL ,  Lalit Keshav MESTHA ,  Beilei XU

IPC分类号： G06K9/36

CPC分类号： G06K9/6217 ,  A61B5/024 ,  G06K9/0057 ,  G06K2209/05

摘要： What is disclosed is a computationally efficient system and method for estimating a subject's cardiac pulse rate from multi-channel source video data. In one embodiment, A time-series signal is continuously processed by repeatedly: (1) conditioning the estimated source signal obtained on a previous iteration to produce a next reference signal; (2) using this reference signal to perform constrained source separation on this next segment to obtain an estimated source signal. A frequency at which this next estimated source signal converged is the subject's estimated cardiac pulse rate for this signal segment. The reference signal is repeatedly updated. Upon convergence, the sliding window is shifted to define a next segment of the time-series signal. The method repeats for each time-series signal segment on a continuous basis or until a termination criteria is met. In such a manner, the subject's cardiac pulse rate is estimated from video data on a continuous basis.

摘要翻译： 所公开的是用于从多信道源视频数据估计被摄体的心脏脉搏率的计算有效的系统和方法。 在一个实施例中，时间序列信号通过重复地连续处理：（1）调节在先前迭代中获得的估计的源信号以产生下一个参考信号; （2）使用该参考信号在该下一个段执行受限的源分离以获得估计的源信号。 该下一个估计的源信号收敛的频率是该信号段的对象的估计的心脏脉搏率。 参考信号被重复更新。 在收敛时，滑动窗口被移动以限定时间序列信号的下一个段。 该方法在连续的基础上重复每个时间序列信号段，或直到满足终止标准。 以这种方式，从连续的视频数据估计被检者的心脏脉搏率。

公开(公告)号：US20130324874A1

公开(公告)日：2013-12-05

申请号：US13486715

申请日：2012-06-01

申请人： Edgar A. BERNAL ,  Lalit Keshav MESTHA ,  Beilei XU

发明人： Edgar A. BERNAL ,  Lalit Keshav MESTHA ,  Beilei XU

IPC分类号： A61B5/113

CPC分类号： A61B5/1077 ,  A61B5/0064 ,  A61B5/091 ,  A61B5/1128 ,  A61B5/1135 ,  G01B11/2527

摘要： What is disclosed is a system and method for estimating minute ventilation by analyzing distortions in reflections of structured illumination patterns captured in a video of a thoracic region of a subject of interest being monitored for respiratory function. Measurement readings can be acquired in a few seconds under a diverse set of lighting conditions and provide a non-contact approach to patient respiratory function that is particularly useful for infant care in an intensive care unit (ICU), sleep studies, and can aid in the early detection of sudden deterioration of physiological conditions due to detectable changes in patient chest volume. The systems and methods disclosed herein provide an effective tool for minute ventilation estimation and respiratory function study and analysis in a non-contact remote sensing environment.

摘要翻译： 所公开的是通过分析被监测用于呼吸功能的感兴趣受试者的胸部区域的视频中捕获的结构化照明模式的反射中的失真来估计每分钟通气的系统和方法。 测量读数可以在多种照明条件下几秒钟内获得，并提供对患者呼吸功能的非接触式方法，对重症监护室（ICU），睡眠研究中的婴儿护理特别有用，并且可以帮助 由于患者胸部体积的可检测变化，早期检测到生理状况突然恶化。 本文公开的系统和方法为非接触式遥感环境中的分钟通气估计和呼吸功能研究和分析提供了有效的工具。

公开(公告)号：US20130235178A1

公开(公告)日：2013-09-12

申请号：US13416436

申请日：2012-03-09

申请人： Yao Rong WANG ,  Lalit Keshav MESTHA ,  Beilei XU ,  Raja BALA ,  Graham PENNINGTON

发明人： Yao Rong WANG ,  Lalit Keshav MESTHA ,  Beilei XU ,  Raja BALA ,  Graham PENNINGTON

IPC分类号： H04N5/33 ,  G06K9/62

CPC分类号： G06K9/00255 ,  G06K9/00838 ,  G06K9/2018 ,  H04N5/33

摘要： What is disclosed is a system and method for selecting the optimal wavelength ban combination for a multi-band infrared camera system which is optimized for skin detection. An objective function is constructed specifically for this application from classified performance and the algorithm generates wavelengths by maximizing the objective function. A specific wavelength band combination is selected which maximizes the objective function. Also disclosed is a 3-band and 4-band camera system with filters each having a transmittance of one of a combination of wavelength bands optimized to detect skin in the infrared band. The camera systems disclosed herein find their intended uses in a wide array of vehicle occupancy detection systems and applications. Various embodiments are disclosed.

摘要翻译： 公开的是用于为针对皮肤检测而优化的多频带红外相机系统选择最佳波长禁止组合的系统和方法。 目标函数由分类性能专门为此应用构建，算法通过最大化目标函数生成波长。 选择使目标函数最大化的特定波段组合。 还公开了一种具有滤波器的三频带和四频带相机系统，每个滤波器具有被优化以检测红外频带中的皮肤的波长带的组合之一的透射率。 本文公开的相机系统在各种车辆占用检测系统和应用中找到其预期用途。 公开了各种实施例。

公开(公告)号：US20130079658A1

公开(公告)日：2013-03-28

申请号：US13246560

申请日：2011-09-27

申请人： George Cunha CARDOSO ,  Lalit Keshav MESTHA ,  Beilei XU

发明人： George Cunha CARDOSO ,  Lalit Keshav MESTHA ,  Beilei XU

IPC分类号： A61B5/08

CPC分类号： A61B5/0059 ,  A61B5/0037 ,  A61B5/0816 ,  A61B5/0836 ,  A61B5/7257 ,  A61B2576/00 ,  A61M2205/3313 ,  A61M2230/432 ,  G01N21/3504 ,  G01N33/497

摘要： What is disclosed is a system and method for image-based determination of carbon dioxide (CO2) concentration in exhaled breath. In one embodiment, an image of the exhaled airstream of a subject of interest is received. The image is captured using a mid-wave infrared camera system having an optical filter tuned to the infrared absorption band of CO2. The image is preprocessed to isolate a region of pixels containing the exhaled airstream and intensity values of pixels in the identified region are normalized by a value of a known radiance such as that of the subject's nose or face. The image is analyzed to determine CO2 concentration levels of the exhaled airstream using a calibration curve which relates pixel intensity to CO2 concentrations. The calibration curve is derived using a physics-based parameterized model. The CO2 concentration levels are determined and communicated to a computer workstation. Various embodiments are disclosed.

摘要翻译： 公开的是用于基于图像的测定呼出气中的二氧化碳（CO 2）浓度的系统和方法。 在一个实施例中，接收感兴趣对象的呼出气流的图像。 使用具有调谐到CO 2的红外吸收带的光学滤波器的中波红外相机系统捕获图像。 图像被预处理以隔离包含呼出气流的像素的区域，并且通过诸如被摄体的鼻子或脸部的已知辐射的值对识别的区域中的像素的强度值进行归一化。 使用将像素强度与CO2浓度相关联的校准曲线来分析图像以确定呼出气流的CO 2浓度水平。 使用基于物理的参数化模型导出校准曲线。 确定二氧化碳浓度水平并传送到计算机工作站。 公开了各种实施例。

公开(公告)号：US20130343634A1

公开(公告)日：2013-12-26

申请号：US13533678

申请日：2012-06-26

申请人： Beilei XU ,  Lalit Keshav MESTHA ,  Edgar A. BERNAL

发明人： Beilei XU ,  Lalit Keshav MESTHA ,  Edgar A. BERNAL

IPC分类号： G06K9/36

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

摘要： 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.

摘要翻译： 公开的是同时重建用非结构化和结构化照明源照明的场景的图像的系统和方法。 在一个实施例中，系统包括捕获包含由结构化照明源照亮的场景反射的能量的第一2D图像和包含由非结构化照明源照亮的场景反射的能量的第二2D图像。 在拍摄视频期间，控制器实现对结构化和非结构化照明源的操纵。 处理器被配置为执行机器可读程序指令，使得控制器能够操纵照明源，并且使用第二2D图像和场景的3D表面图使用第一图像来实现场景的2D强度地图的同时重建 2D图像。 通过操纵照明源来实现重建。

公开(公告)号：US20130322729A1

公开(公告)日：2013-12-05

申请号：US13483992

申请日：2012-05-30

申请人： Lalit Keshav MESTHA ,  Beilei XU ,  Edgar A. BERNAL

发明人： Lalit Keshav MESTHA ,  Beilei XU ,  Edgar A. BERNAL

IPC分类号： G06K9/46

CPC分类号： G06T7/0016 ,  A61B5/0077 ,  A61B5/02 ,  A61B5/021 ,  A61B5/02416 ,  A61B5/029 ,  A61B5/489 ,  G06T2207/10024 ,  G06T2207/10048 ,  G06T2207/30076 ,  G06T2207/30101

摘要： What is disclosed is a non-contact system and method for determining cardiac function parameters from a vascular pattern identified from RGB and IR video signals captured simultaneously of a region of exposed skin of a subject of interest. In one embodiment, a video of a region of exposed skin is captured using a video camera that captures color values for pixels over visible channels and an IR camera that measures pixel intensity values in wavelength ranges of interest. Pixel intensity values are processed to generate a vascular binary mask that indicates pixel locations corresponding to the vascular pathways. The IR images are registered with corresponding data from the camera's visible channels such that pixels that correspond to the vascular pattern can be isolated in each frame of the video of visible color data. Once processed, pixels associated with the isolated vascular patterns are analyzed to determine desired cardiac function parameters.

摘要翻译： 公开的是一种非接触式系统和方法，用于根据由目标受试者的暴露皮肤区域同时捕获的RGB和IR视频信号识别的血管图案来确定心脏功能参数。 在一个实施例中，使用捕获可见信道上的像素的颜色值的摄像机和测量感兴趣的波长范围内的像素强度值的IR照相机捕获暴露皮肤区域的视频。 处理像素强度值以产生指示对应于血管通路的像素位置的血管二进制掩模。 红外图像与来自相机的可视通道的相应数据一起登记，使得与血管图案相对应的像素可以在可见颜色数据的视频的每个帧中被隔离。 一旦处理，分析与分离的血管图案相关联的像素以确定期望的心脏功能参数。

公开(公告)号：US20130076913A1

公开(公告)日：2013-03-28

申请号：US13247343

申请日：2011-09-28

申请人： Beilei XU ,  Wencheng WU ,  Lalit Keshav MESTHA ,  Graham PENNINGTON

发明人： Beilei XU ,  Wencheng WU ,  Lalit Keshav MESTHA ,  Graham PENNINGTON

IPC分类号： G06K9/00 ,  H04N5/225

CPC分类号： G06K9/2018 ,  H04N5/23206 ,  H04N5/23219 ,  H04N5/332

摘要： What is disclosed is a system and method for identifying materials comprising an object captured in a video and for using the identified materials to track that object as it moves across the captured video scene. In one embodiment, a multi-spectral or hyper-spectral sensor is used to capture a spectral image of an object in an area of interest. Pixels in the spectral planes of the spectral images are analyzed to identify a material comprising objects in that area of interest. A location of each of the identified objects is provided to an imaging sensor which then proceeds to track the objects as they move through a scene. Various embodiments are disclosed.

摘要翻译： 公开的是用于识别包括在视频中捕获的对象的材料的系统和方法，并且用于当所述对象在所捕获的视频场景中移动时使用所识别的材料来跟踪该对象。 在一个实施例中，使用多光谱或超光谱传感器来捕获感兴趣区域中的对象的光谱图像。 分析光谱图像的光谱平面中的像素以识别包含该感兴趣区域中的物体的材料。 每个识别的对象的位置被提供给成像传感器，然后成像传感器在它们移动通过场景时跟踪对象。 公开了各种实施例。

公开(公告)号：US20130077958A1

公开(公告)日：2013-03-28

申请号：US13239642

申请日：2011-09-22

申请人： Beilei XU ,  Lalit Keshav MESTHA ,  Yao Rong WANG ,  Peter PAUL

发明人： Beilei XU ,  Lalit Keshav MESTHA ,  Yao Rong WANG ,  Peter PAUL

IPC分类号： G03B11/00 ,  G02B26/00

CPC分类号： G06K9/209 ,  G01J3/2823 ,  G01J3/36 ,  G02B5/201 ,  G02B5/208 ,  G03B11/00 ,  G06K9/00255 ,  G06K2009/00932

摘要： What is disclosed is a filter array for a multi-resolution multi-spectral camera system which not only captures 2D images at multiple wavelength bands simultaneously but also at a spatial resolution that meets the demand for spatial feature extraction. The present system optimizes filter bands that provide high image contrast at the highest possible resolution to enable spatial feature extraction and other wavelength bands at lower resolution to achieve maximum number of wavelength bands (e.g. spectral resolution) for multi-spectral analysis. After determining the required spatial resolution and number of wavelength bands for spectral analysis, multiple filters are arranged in a geometric pattern with each filter being designed to have specified wavelength and spatial resolution. Physical sizes of filters differ within each filter group. This maximizes the detector usage while optimizing the trade-off between spatial resolution and spectral resolution. Filter gaps are fixed or tuned to wavelengths of interest.

摘要翻译： 公开的是用于多分辨率多光谱照相机系统的滤光器阵列，其不仅同时捕获多个波长带处的2D图像，而且以满足空间特征提取的需求的空间分辨率。 本系统优化以最高可能分辨率提供高图像对比度的滤波器频带，以便能够以较低分辨率进行空间特征提取和其他波长带，以实现用于多光谱分析的最大数量的波段（例如光谱分辨率）。 在确定所需的空间分辨率和用于频谱分析的波长带数之后，多个滤波器以几何图形排列，每个滤波器被设计为具有指定的波长和空间分辨率。 每个过滤器组中过滤器的物理尺寸不同。 这最大限度地提高了检测器的使用率，同时优化了空间分辨率和光谱分辨率之间的折衷。 滤波器间隙固定或调谐到感兴趣的波长。