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公开(公告)号：WO2019145142A1
公开(公告)日：2019-08-01
申请号：PCT/EP2019/050362
申请日：2019-01-09
IPC: A61B5/1455 , A61B5/00 , A61B5/024
CPC classification number: A61B5/14551 , A61B5/02416 , A61B5/7207
Abstract: The present invention relates to a device, system and method for determining at least one vital sign of a subject. The device (130) comprises an input interface (131) configured to obtain at least three detection signals derived from detected electromagnetic radiation transmitted through or reflected from a skin region of a subject, wherein each detection signal comprises wavelength-dependent reflection or transmission information in a different wavelength channel, a transformation unit (132) configured to transform the at least three detection signals into at least three transformed detection signals by temporally normalizing the at least three detection signals or applying a non-linear transfer function on the at least three detection signals, a projection unit (133) configured to project the at least three transformed detection signals into at least two projected signals in a subspace orthogonal to a predetermined distortion direction, and a vital sign determination unit (134) configured to determine an indicator or concentration of blood components or species as vital sign from said at least two projected signals by indirectly determining the relative strength of a pulsatile component in said at least two projected signals.
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公开(公告)号：WO2019030074A1
公开(公告)日：2019-02-14
申请号：PCT/EP2018/070845
申请日：2018-08-01
Inventor： WANG, Wenjing , DEN BRINKER, Albertus, Cornelis , DE HAAN, Gerard
Abstract: The application relates to camera-based vital signs monitoring using remote PPG. A Device (10) for determining a physiological parameter comprises: an interface (11) for receiving image data comprising a time-sequence of image frames; a processor (12) for processing said data and configured to perform, for each frame, the steps of: generating a set of weighting maps comprising at least a first and second weighting map for spatially weighting pixels of the frame (102); determining a first weighted image frame by spatially weighting pixels of the image frame based on the first weighting map (103); determining a corresponding second weighted image frame; determining a first statistical parameter value based on the first weighted image frame (105); determining a corresponding second statistical parameter value; concatenating said first statistical parameter values over time based on the time-sequence of the corresponding image frames to obtain a first candidate signal (107); to obtain a corespnding second candidate signal (108); extracting a physiological parameter of the subject based on said first and/or said second candidate signal (109).
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公开(公告)号：WO2017137415A1
公开(公告)日：2017-08-17
申请号：PCT/EP2017/052700
申请日：2017-02-08
Inventor： DEN BRINKER, Albertus, Cornelis , WANG, Wenjin , DE HAAN, Gerard
IPC: G06T7/00
CPC classification number: G06T7/0012 , G06T2207/30076 , G06T2207/30088
Abstract: The present invention relates to a device, system and method for pulsatility detection. The proposed device comprises an input interface (30) for obtaining image data of a scene, said image data comprising a time sequence of image frames, an extraction unit (31) for extracting a time- varying signal indicative of a periodic physiological phenomenon from a region of interest of said image data, a transformation unit (32) for transforming said time- varying signal into a spectral signal, a partitioning unit (33) for partitioning the spectral signal into at least an in-band sub-signal covering a first frequency range of said spectral signal and an out-band sub-signal covering a second frequency range of said spectral signal, wherein said first frequency range comprises at least a frequency range of the periodic physiological phenomenon, an analysis unit (34) for separately deriving an in-band measure from the in-band sub-signal and an out-band measure from the out-band sub-signal, the in- band measure and the out-band measure representing a descriptor, and a classifier (35) for classifying said region of interest as a pulsatile region of a living being or as a non-pulsatile region based on the descriptor.
Abstract translation: 用于脉动检测的装置，系统和方法技术领域本发明涉及用于脉动检测的装置，系统和方法。 所提出的设备包括：用于获得场景的图像数据的输入接口（30），所述图像数据包括图像帧的时间序列;提取单元（31），用于从表示周期性生理现象的时间变化信号中提取 所述图像数据的感兴趣区域;变换单元（32），用于将所述时变信号变换为频谱信号;分割单元（33），用于将所述频谱信号分割为至少一个带内子信号，所述带内子信号覆盖第一 所述频谱信号的频率范围和覆盖所述频谱信号的第二频率范围的频带外子信号，其中所述第一频率范围至少包括所述周期性生理现象的频率范围;分析单元（34），用于分别导出 来自带内子信号的带内测量和来自带外子信号的带外测量，带内测量和带外测量表示描述符，以及分类器（35） 用于根据描述符将所述感兴趣区域分类为活体的脉动区域或非脉动区域。
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4.发明申请DEVICE, SYSTEM AND METHOD FOR DETERMINING VITAL SIGN INFORMATION OF A SUBJECT 审中-公开确定受试者的生命体征信息的装置，系统和方法
公开(公告)号：WO2017093379A1
公开(公告)日：2017-06-08
申请号：PCT/EP2016/079390
申请日：2016-12-01
Inventor： DE HAAN, Gerard , VAN GASTEL, Mark, Josephus, Henricus
IPC: A61B5/0205 , A61B5/024 , A61B5/00 , A61B5/021 , A61B5/08
CPC classification number: A61B5/02416 , A61B5/0205 , A61B5/02108 , A61B5/0816 , A61B5/7214
Abstract: The present invention relates to a device, system and a method for determining vital sign information of a subject. To provide an increased signal quality and an improved robustness of the obtained vital sign information with respect to motion and low SNR, the proposed device tries to find the linear combination of the color channels, which suppresses the distortions best in a frequency band including the pulse rate, and consequently use this same linear combination to extract the desired vital sign information (e.g. represented by a vital sign information signal such as a respiration signal or Mayer waves) in a lower frequency band.
Abstract translation: 用于确定对象的生命体征信息的装置，系统和方法技术领域本发明涉及一种用于确定对象的生命体征信息的装置，系统和方法。 为了提供所获得的生命体征信息相对于运动和低SNR的增加的信号质量和改善的健壮性，所提出的设备试图找到色彩通道的线性组合，其抑制包括脉冲的频带中的最佳失真 速率，并且因此使用相同的线性组合来在较低频带中提取期望的生命体征信息（例如由生命体征信息信号（例如呼吸信号或迈尔波）表示）。
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公开(公告)号：WO2017137435A1
公开(公告)日：2017-08-17
申请号：PCT/EP2017/052748
申请日：2017-02-08
Inventor： WANG, Wenjin , DE HAAN, Gerard
IPC: G06T7/00
CPC classification number: G06T7/0012 , G06T2207/30076 , G06T2207/30088
Abstract: The present invention relates to a device, system and method for skin detection. To enable a reliable, accurate and fast detection the proposed device comprises an input interface (30) for obtaining image data of a scene, said image data comprising a time sequence of image frames, an extraction unit (31) for extracting a photoplethysmography (PPG) signal from a region of interest of said image data, a transformation unit (32) for transforming said PPG signal into a spectral signal, a sorting unit (33) for sorting said spectral signal to obtain a sorted spectral signal representing a descriptor, and a classifier (34) for classifying said region of interest as skin region of a living being or as non-skin region based on the descriptor.
Abstract translation: 皮肤检测装置，系统和方法技术领域本发明涉及用于皮肤检测的装置，系统和方法。 为了实现可靠，准确和快速的检测，所提出的设备包括用于获得场景的图像数据的输入接口（30），所述图像数据包括图像帧的时间序列，提取单元（31），用于提取光电容积脉搏波图（PPG ）信号;变换单元（32），用于将所述PPG信号变换成频谱信号;分类单元（33），用于对所述频谱信号进行分类以获得表示描述符的分类频谱信号;以及 分类器（34），用于基于所述描述符将所述感兴趣区域分类为活体的皮肤区域或非皮肤区域。
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Patent Agency Ranking
公开(公告)号：WO2019030124A1
公开(公告)日：2019-02-14
申请号：PCT/EP2018/071072
申请日：2018-08-02
Inventor： WANG, Wenjing , DE HAAN, Gerard , DEN BRINKERN, Albertus, Cornelis
Abstract: The present invention relates to fields of medical technology and camera- based vital signs monitoring using remote photoplethysmography (rPPG). A Device (10) for determining a physiological parameter of a subject (20) is presented, the device comprising: an interface (11) for receiving image data of a scene, said image data comprising a time- sequence of image frames; and a processor (12) for processing said image data, wherein the processor is configured to perform the steps of: determining, for each of said image frames, a first statistical parameter value indicative of a statistical dispersion of pixel values of said image frame (202); concatenating said first statistical parameter values over time based on the time-sequence of the corresponding image frames to obtain a first candidate signal (203); extracting a physiological parameter of the subject based on said first candidate signal (204). The present invention further relates to a corresponding system (1) and method (200).
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7.发明申请
公开(公告)号：WO2018077774A1
公开(公告)日：2018-05-03
申请号：PCT/EP2017/076947
申请日：2017-10-23
Inventor： DE HAAN, Gerard , DEN BRINKER, Albertus, Cornelis , WANG, Wenjing
IPC: A61B5/024 , A61B5/00 , A61B5/1455 , A61B5/11
Abstract: The present invention relates to a device, system and method for obtaining a vital signal of a subject. To achieved increased robustness against motion, the device comprises a decomposition unit (12) for performing a spectral decomposition of at least two photoplethysmography detection signals being related to a physiological property of the subject and allowing extraction of a vital sign of the subject to obtain two or more spectral components of the detection signals. A weight is determined per spectral component based on an estimate of the relevance of the respective spectral component to the vital sign, derived from a characteristic of said spectral component. Finally, a vital sign is obtained by weighting at least part of the spectral components with the determined corresponding weight and extracting a vital sign from the weighted spectral components or by extracting two or more vital sign sub-signals from individual spectral components of the at least two detection signals and, weighting the extracted vital sign sub-signals with the determined weight of the corresponding spectral component, and extracting a vital sign from the weighted vital sign sub-signals.
Abstract translation: 用于获得对象的生命信号的装置，系统和方法技术领域本发明涉及用于获得对象的生命信号的装置，系统和方法。 为了获得增加的针对运动的鲁棒性，所述设备包括分解单元（12），用于执行与对象的生理属性有关的至少两个光电容积脉搏波检测信号的光谱分解，并允许提取对象的生命体征以获得两个 或更多检测信号的频谱分量。 基于从所述频谱分量的特性导出的相应频谱分量与生命体征的相关性的估计，确定每个频谱分量的权重。 最后，通过用确定的对应权重对至少一部分频谱分量进行加权并从加权频谱分量中提取生命体征或通过从至少至少部分频谱分量的至少一个频谱分量中提取两个或更多生命体征子信号来获得生命体征 两个检测信号，并且将所提取的生命体征子信号与所确定的相应的频谱分量的权重相加，并且从加权的生命体征子信号中提取生命体征。
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公开(公告)号：WO2016185004A1
公开(公告)日：2016-11-24
申请号：PCT/EP2016/061376
申请日：2016-05-20
Inventor： WANG, Wenjin , DE HAAN, Gerard
CPC classification number: G06T7/0012 , A61B5/0077 , A61B5/02416 , A61B5/7485 , A61B2562/0233 , A61B2576/00 , G06K9/00114 , G06K9/00228 , G06K9/00234 , G06K9/00268 , G06K9/00496 , G06K9/00906 , G06K9/6215 , G06K9/622 , G06K9/6232 , G06K9/624 , G06T2207/10016 , G06T2207/20021 , G06T2207/30088
Abstract: According to an aspect, there is provided an apparatus for identifying living skin tissue in a video sequence, the apparatus comprising a processing unit configured to receive a video sequence, the video sequence comprising a plurality of image frames; divide each of the image frames into a plurality of frame segments, wherein each frame segment is a group of neighboring pixels in the image frame; form a plurality of video sub-sequences, each video sub-sequence comprising a frame segment from two or more of the plurality of image frames; analyze the plurality of video sub-sequences to determine a pulse signal for each video sub-sequence; determine a similarity matrix based on pairwise similarities for each determined pulse signal with each of the other determined pulse signals; and identify areas of living skin tissue in the video sequence from the similarity matrix.
Abstract translation: 根据一方面，提供了一种用于识别视频序列中的活体皮肤组织的装置，该装置包括：处理单元，被配置为接收视频序列，所述视频序列包括多个图像帧; 将每个图像帧划分成多个帧段，其中每个帧段是图像帧中的一组相邻像素; 形成多个视频子序列，每个视频子序列包括来自所述多个图像帧中的两个或更多个的帧片段; 分析多个视频子序列以确定每个视频子序列的脉冲信号; 基于与每个确定的其他确定的脉冲信号的每个确定的脉冲信号的成对相似度来确定相似性矩阵; 并从相似性矩阵中识别视频序列中活体皮肤组织的区域。
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公开(公告)号：WO2016184705A1
公开(公告)日：2016-11-24
申请号：PCT/EP2016/060250
申请日：2016-05-09
Inventor： DE HAAN, Gerard , WANG, Wenjin
CPC classification number: G06T7/0016 , A61B5/0077 , A61B5/02416 , G06K9/00114 , G06K9/00234 , G06K9/00496 , G06K9/00906 , G06K9/4652 , G06K9/6215 , G06K9/622 , G06K9/6232 , G06K9/624 , G06K9/64 , G06T2207/10016 , G06T2207/10024 , G06T2207/20216 , G06T2207/30076
Abstract: According to an aspect, there is provided an apparatus for determining a pulse signal from a video sequence, the apparatus comprising a processing unit configured to obtain a video sequence, the video sequence comprising a plurality of image frames; form a plurality of video sub-sequences, each video sub-sequence comprising a frame segment from each image frame in a subset of the image frames, wherein each image frame is divided into a plurality of frame segments; for a first video sub-sequence formed from frame segments from a first subset of image frames, comparing a representative value for the first video sub-sequence to representative values for video sub-sequences formed from frame segments from a second subset of image frames; concatenate the first video sub-sequence to a second video sub-sequence formed from frame segments from the second subset of image frames based on the comparison of representative values; and determine a pulse signal from the concatenated video sub-sequences.
Abstract translation: 根据一方面，提供了一种用于从视频序列确定脉冲信号的装置，该装置包括：处理单元，被配置为获得视频序列，所述视频序列包括多个图像帧; 形成多个视频子序列，每个视频子序列包括来自图像帧的子集中的每个图像帧的帧片段，其中每个图像帧被分成多个帧片段; 对于从图像帧的第一子集的帧段形成的第一视频子序列，将第一视频子序列的代表值与来自图像帧的第二子集的帧段形成的视频子序列的代表值进行比较; 基于代表值的比较，将第一视频子序列与从图像帧的第二子集的帧段形成的第二视频子序列连接起来; 并从连接的视频子序列确定脉冲信号。
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公开(公告)号：WO2016184703A1
公开(公告)日：2016-11-24
申请号：PCT/EP2016/060246
申请日：2016-05-09
Inventor： WANG, Wenjin , DE HAAN, Gerard
CPC classification number: A61B5/02427 , A61B5/0077 , A61B5/02416 , A61B5/7485 , A61B2562/0233 , A61B2576/00 , G06K9/00114 , G06K9/00234 , G06K9/00496 , G06K9/00765 , G06K9/00906 , G06K9/34 , G06K9/4652 , G06K9/6215 , G06K9/622 , G06K9/6232 , G06K9/624
Abstract: According to an aspect, there is provided an apparatus for identifying living skin tissue in a video sequence, the apparatus comprising a processing unit configured to obtain a video sequence, the video sequence comprising a plurality of image frames; divide each of the image frames into a first plurality of frame segments; form a first plurality of video sub-sequences, each video sub-sequence comprising a frame segment from the first plurality of frame segments for two or more of the image frames; divide each of the image frames into a second plurality of frame segments, the second plurality of frame segments comprising a greater number of frame segments than the first plurality of frame segments; form a second plurality of video sub-sequences, each video sub-sequence comprising a frame segment from the second plurality of frame segments for two or more of the image frames; analyze the video sub-sequences in the first plurality of video sub-sequences and the second plurality of video sub-sequences to determine a pulse signal for each video sub-sequence; and analyze the pulse signals to identify areas of living skin tissue in the video sequence.
Abstract translation: 根据一方面，提供了一种用于识别视频序列中的活体皮肤组织的装置，该装置包括：处理单元，被配置为获得视频序列，所述视频序列包括多个图像帧; 将每个图像帧划分成第一多个帧段; 形成第一多个视频子序列，每个视频子序列包括来自用于两个或更多个图像帧的第一多个帧片段的帧片段; 将每个图像帧划分成第二多个帧段，第二多个帧段包括比第一多个帧段更多数量的帧段; 形成第二多个视频子序列，每个视频子序列包括来自用于两个或更多个图像帧的第二多个帧片段的帧片段; 分析第一多个视频子序列和第二多个视频子序列中的视频子序列，以确定每个视频子序列的脉冲信号; 并分析脉冲信号以识别视频序列中活体皮肤组织的区域。
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