公开(公告)号：US08810658B2

公开(公告)日：2014-08-19

申请号：US13364835

申请日：2012-02-02

申请人： Sandra Skaff ,  Raja Bala ,  Lalit Keshav Mestha ,  Beilei Xu

发明人： Sandra Skaff ,  Raja Bala ,  Lalit Keshav Mestha ,  Beilei Xu

IPC分类号： H04N5/33

CPC分类号： H04N5/33 ,  G06T7/90 ,  G06T2207/10048 ,  H04N5/332 ,  H04N9/045 ,  H04N9/43

摘要： What is disclosed is a system and method for estimating color for pixels in an infrared image. In one embodiment, an infrared image is received which has been captured using a N-band infrared imaging system comprising a multi-spectral camera or a hyperspectral camera. The IR image is composed of an array of pixels with N intensity values having been collected for each pixel in the image. Then, for each pixel of interest, a search metric is used to search a database of vector samples to identify a visible-IR set which is closest to the intensity values of the IR band vector collected for the pixel. A visible vector representation is then estimated for the pixel based upon the visible portion corresponding to the closest visible-IR set. Thereafter, color coordinates for this pixel are computed from the visible vector. The method repeats for all pixels of interest in the IR image.

摘要翻译： 公开的是用于估计红外图像中的像素的颜色的系统和方法。 在一个实施例中，接收使用包括多光谱相机或高光谱相机的N波段红外成像系统捕获的红外图像。 IR图像由对图像中的每个像素收集的具有N个强度值的像素阵列组成。 然后，对于感兴趣的每个像素，使用搜索度量来搜索向量样本的数据库，以识别最接近为该像素收集的IR带矢量的强度值的可见IR集合。 然后基于对应于最接近的可见IR集的可见部分，针对像素估计可见矢量表示。 此后，从可见矢量计算该像素的颜色坐标。 该方法针对IR图像中所有感兴趣的像素重复。

公开(公告)号：US09171196B2

公开(公告)日：2015-10-27

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： H04N7/18 ,  G06K9/00 ,  H04N5/33 ,  G06K9/20

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：US20110305389A1

公开(公告)日：2011-12-15

申请号：US12815823

申请日：2010-06-15

申请人： Martin S. Maltz ,  Raja Bala ,  Lalit Keshav Mestha

发明人： Martin S. Maltz ,  Raja Bala ,  Lalit Keshav Mestha

IPC分类号： G06K9/00

CPC分类号： G06K9/00 ,  G06T11/001

摘要： What is disclosed is a novel system and method for generating a hierarchical LUT for implementing a color transformation within a color imaging system. In one embodiment, a coarse LUT is received which comprises a plurality of sub-cubes arrayed on a plurality of coarse levels on a structured coarse grid. Each of the sub-cubes encompasses at least one coarse LUT node. Sub-cubes in the coarse grid are identified that are bisected by a boundary surface of the gamut. Then, each of the identified coarse LUT sub-cubes are associated with fine LUT which comprises a plurality of fine LUT nodes arrayed on a plurality of fine levels on a structured fine grid. A hierarchical LUT is generated from the coarse LUT and the associated fine LUTs. Thereafter, the hierarchical LUT can be used for color transformation within a color imaging system.

摘要翻译： 公开的是用于生成用于实现彩色成像系统内的颜色变换的分层LUT的新型系统和方法。 在一个实施例中，接收粗略LUT，其包括排列在结构化粗网格上的多个粗略级上的多个子立方体。 每个子立方体包含至少一个粗略LUT节点。 识别粗网格中的子立方体，其被色域的边界面平分。 然后，识别的粗略LUT子立方体中的每一个都与精细LUT相关联，该精细LUT包括排列在结构化细网格上的多个精细级上的多个精细LUT节点。 从粗略LUT和相关联的精细LUT生成分层LUT。 此后，分层LUT可以用于彩色成像系统内的颜色变换。

公开(公告)号：US07835033B2

公开(公告)日：2010-11-16

申请号：US12019940

申请日：2008-01-25

申请人： Raja Bala ,  Martin S. Maltz ,  Lalit Keshav Mestha ,  Alvaro Enrique Gil

发明人： Raja Bala ,  Martin S. Maltz ,  Lalit Keshav Mestha ,  Alvaro Enrique Gil

IPC分类号： G06F15/00

CPC分类号： G06F15/00 ,  H04N1/6058

摘要： This disclosure provides a method and system to generate device dependent color space representations for an image output device. The method and system are particularly applicable to a printing device, where gamut boundary separated profile methods are executed to map device in-gamut and device out-of-gamut colors.

摘要翻译： 本公开提供了一种用于为图像输出设备生成依赖于设备的色彩空间表示的方法和系统。 该方法和系统特别适用于打印设备，其中执行色域边界分离的轮廓方法来对设备进行色域内和设备色域外的颜色映射。

公开(公告)号：US08977347B2

公开(公告)日：2015-03-10

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

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：US08855384B2

公开(公告)日：2014-10-07

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： G06K9/00

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 received. A sliding window is used to define overlapping segments of the time-series signal. Signal segments are processed by performing constrained independent component analysis (cICA) until convergence to obtain an estimated source signal. A frequency of each estimated source signal obtained by the cICA at convergence is determined to be the subject's estimated cardiac pulse rate for each signal segment. A seed reference signal used by the cICA is repeatedly updated. A sliding window is shifted to define a next time-series signal segment for processing. The method repeats for each signal segment until a termination criteria is met. In such a manner, the subject's cardiac pulse rate is estimated from a video of the subject 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，接收时间序列信号。 滑动窗口用于定义时间序列信号的重叠段。 通过执行受约束的独立分量分析（cICA）直到收敛以获得估计的源信号来处理信号段。 将通过cICA在会聚处获得的每个估计的源信号的频率确定为每个信号段的被摄体估计的心脏脉搏率。 cICA使用的种子参考信号被重复更新。 移动滑动窗口以定义下一个时间序列信号段进行处理。 该方法对于每个信号段重复，直到满足终止标准。 以这种方式，从受试者的视频连续地估计受试者的心脏脉搏率。

公开(公告)号：US08654402B2

公开(公告)日：2014-02-18

申请号：US12472689

申请日：2009-05-27

申请人： Lalit Keshav Mestha ,  Richard Leighton Howe ,  Raja Bala

发明人： Lalit Keshav Mestha ,  Richard Leighton Howe ,  Raja Bala

IPC分类号： G06K15/00

CPC分类号： G06K15/00 ,  H04N1/52 ,  H04N1/6027 ,  H04N1/6033

摘要： A device, system, and method for reducing the pitch-to-pitch variation of color using pitch-based linearization of halftone screens are presented. A selection of images is printed at different pitches, and each image is measured and tracked with its pitch. Pitch-based TRCs are constructed using patches, which may be scheduled during print run or during machine diagnostic process and halftone dots are constructed and uploaded in the image path for each pitch. The updated dots are then used to produce a linearized halftone image for transfer to a print surface which results in improved color balance.

摘要翻译： 提出了使用基于色调的网版线性化来减少颜色间距变化的装置，系统和方法。 以不同的间距打印图像的选择，并且每个图像被测量并用其间距进行跟踪。 基于间距的TRC使用补丁构建，其可以在打印运行期间或在机器诊断过程期间被调度，并且在每个间距的图像路径中构造并上传半色调点。 然后更新的点用于产生线性化的半色调图像以转印到打印表面，这导致改善的色彩平衡。

公开(公告)号：US07768682B2

公开(公告)日：2010-08-03

申请号：US12017746

申请日：2008-01-22

申请人： Lalit Keshav Mestha ,  Yao Rong Wang ,  Alvaro Enrique Gil ,  Martin S. Maltz ,  Raja Bala

发明人： Lalit Keshav Mestha ,  Yao Rong Wang ,  Alvaro Enrique Gil ,  Martin S. Maltz ,  Raja Bala

IPC分类号： G03F3/08

CPC分类号： H04N1/6025 ,  G06K15/02 ,  G06K15/1822 ,  G06K15/1825 ,  G06K2215/0094

摘要： A multi-dimensional printer profile look-up table for color correction is generated. First, an initial estimate for a black (K) component in a four-color color space for received color signals in the device independent color space is generated by using a three-dimensional parametric function. Next, initial estimates for the three non-black color components of the four-color color space are generated from the generated initial estimate for the black (K) component and the received color signals. Then, a printer profile including a map that maps the device independent color space to the four-color color space is generated using the generated initial estimates for the black (K) and the three non-black color components in the four-color color space.

摘要翻译： 产生用于颜色校正的多维打印机轮廓查找表。 首先，通过使用三维参数函数来生成用于装置独立色彩空间中的接收彩色信号的四色彩色空间中的黑色（K）分量的初始估计。 接下来，从生成的黑（K）分量和接收到的颜色信号的初始估计中产生四色颜色空间的三个非黑色分量的初始估计。 然后，使用生成的四色颜色空间中的黑色（K）和三种非黑色分量的初始估计来生成包括将设备独立颜色空间映射到四色颜色空间的地图的打印机配置文件 。

公开(公告)号：US20090190144A1

公开(公告)日：2009-07-30

申请号：US12019940

申请日：2008-01-25

申请人： Raja Bala ,  Martin S. Maltz ,  Lalit Keshav Mestha ,  Alvaro Enrique Gil

发明人： Raja Bala ,  Martin S. Maltz ,  Lalit Keshav Mestha ,  Alvaro Enrique Gil

IPC分类号： G06F15/00

CPC分类号： G06F15/00 ,  H04N1/6058

摘要： This disclosure provides a method and system to generate device dependent color space representations for an image output device. The method and system are particularly applicable to a printing device, where gamut boundary separated profile methods are executed to map device in-gamut and device out-of-gamut colors.

摘要翻译： 本公开提供了一种用于为图像输出设备生成依赖于设备的色彩空间表示的方法和系统。 该方法和系统特别适用于打印设备，其中执行色域边界分离的轮廓方法来对设备进行色域内和设备色域外的颜色映射。

公开(公告)号：US09301710B2

公开(公告)日：2016-04-05

申请号：US13529648

申请日：2012-06-21

申请人： Lalit Keshav Mestha ,  Edgar A. Bernal ,  Beilei Xu

发明人： Lalit Keshav Mestha ,  Edgar A. Bernal ,  Beilei Xu

IPC分类号： A61B5/05 ,  A61B5/107 ,  A61B5/00 ,  A61B5/08 ,  A61B5/11 ,  A61B5/113 ,  G01B11/25 ,  G06T7/00 ,  G06T7/20 ,  G06K9/00

CPC分类号： A61B5/1077 ,  A61B5/0064 ,  A61B5/0816 ,  A61B5/1128 ,  A61B5/1135 ,  G01B11/2527 ,  G06K9/0053 ,  G06T7/262 ,  G06T7/521 ,  G06T2207/10016 ,  G06T2207/10024 ,  G06T2207/10048 ,  G06T2207/10152 ,  G06T2207/20044 ,  G06T2207/20056 ,  G06T2207/30076 ,  G09G2380/08

摘要： What is disclosed is a system and method for estimating a respiration rate by analyzing distortions in reflections of structured illumination patterns captured in a video containing a view of a subject's thoracic region. In one embodiment, a video of a target region of a body of a subject of interest is received. Video image frames are processed to estimate 3D time-series data for the target region. As more fully disclosed herein, the subject's respiration rate is estimated from the 3D time-series data. Measurements can be acquired under a diverse set of lighting conditions. The teachings hereof provide a non-contact approach to patient respiratory function monitoring that is useful for intensive care units and for monitoring at homes, and which aid in the detection of sudden deterioration of physiological conditions due to changes in respiration rates. The teachings hereof provide an effective tool for non-contact respiratory function study and analysis.

摘要翻译： 公开的是通过分析在包含受试者胸部区域的视图中捕获的结构化照明模式的反射中的失真来估计呼吸率的系统和方法。 在一个实施例中，接收感兴趣对象的身体的目标区域的视频。 处理视频图像帧以估计目标区域的3D时间序列数据。 如本文更全面地公开的，从3D时间序列数据估计对象的呼吸速率。 可以在多种照明条件下获得测量。 本文的教导为患者呼吸功能监测提供了非接触的方法，该方法对于重症监护病房有用，并且在家中进行监测，并且有助于检测呼吸速率变化引起的生理状况突然恶化。 本文的教导为非接触式呼吸功能研究和分析提供了有效的工具。