公开(公告)号：US08693050B2

公开(公告)日：2014-04-08

申请号：US12536600

申请日：2009-08-06

申请人： Lalit Keshav Mestha ,  Wenjie Dong

发明人： Lalit Keshav Mestha ,  Wenjie Dong

IPC分类号： G06F15/00

CPC分类号： H04N1/6033 ,  H04N1/40006

摘要： What is disclosed is a novel system and method for controlling process color in a color adjustment system in an image marking device. A control parameter, such as a gain matrix, forms a basis of an adaptive closed-loop controller. A sensitivity matrix is used to calculate the gain matrix. This permits complex color adjustments at a customer location. The present system and method is well suited for long production runs because, as the system moves (or drifts) away from nominal, the color control system will learn the changes in the system (e.g., new input-output sensitivity) with print, measure, and prediction processes, operating on the test patches, and effectively adapt to these changes by re-computing the feedback controller gains and revising the current actuator values to follow desired target color values. The present system and method can also be used for adjusting or developing a CMYK recipe in color management LUTs.

摘要翻译： 所公开的是用于控制图像标记装置中的颜色调整系统中的处理颜色的新型系统和方法。 诸如增益矩阵的控制参数形成自适应闭环控制器的基础。 灵敏度矩阵用于计算增益矩阵。 这允许在客户位置进行复杂的颜色调整。 本系统和方法非常适合长时间的生产运行，因为随着系统从标称位移（或漂移）移动（或漂移），颜色控制系统将通过打印，测量来了解系统的变化（例如，新的输入 - 输出灵敏度） 以及在测试补丁上运行的预测过程，并且通过重新计算反馈控制器增益并修改当前致动器值以跟随期望的目标颜色值来有效地适应这些变化。 本系统和方法也可用于调整或开发色彩管理LUT中的CMYK配方。

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：US08922829B2

公开(公告)日：2014-12-30

申请号：US13253660

申请日：2011-10-05

申请人： Lina Fu ,  Alvaro Enrique Gil ,  Lalit Keshav Mestha

发明人： Lina Fu ,  Alvaro Enrique Gil ,  Lalit Keshav Mestha

IPC分类号： G06F15/00 ,  G03F3/08 ,  H04N1/60 ,  H04N1/54

CPC分类号： H04N1/60 ,  H04N1/54

摘要： What is disclosed is a method for determining a color solution which achieves color objectives for a color marking device involves performing the following. In one embodiment, N objectives of interest are identified for a color marking device and a N-dimensional Pareto Front is constructed which comprises a collection of color solutions which accommodates those objectives. The Pareto Front is constructed using an optimization process based upon printer models of the objectives. Color solutions can be at least one color recipe, or a combination of color recipes and process actuators. A target point is selected in an N-dimensional objective space based upon at least one user-selected preference. The target point is then mapped to a point on the Pareto Front. The mapping identifies one of the color solutions which, in turn, is used to generate a spot color for the device. The generated spot color achieves the user-selected preference.

摘要翻译： 所公开的是确定实现彩色标记装置的色彩目标的色彩解决方案的方法，包括执行以下操作。 在一个实施例中，为彩色标记装置识别出感兴趣的N个目标，并且构造了包括适应这些目标的颜色解决方案集合的N维帕累托前端。 帕累托前面采用基于目标打印机模型的优化过程构建。 颜色解决方案可以是至少一种颜色配方，或颜色配方和过程执行器的组合。 基于至少一个用户选择的偏好在N维目标空间中选择目标点。 目标点然后映射到帕累托阵线上的一个点。 该映射标识了颜色解决方案之一，而这些颜色解决方案又被用于生成设备的专色。 生成的专色实现了用户选择的偏好。

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：US08818030B2

公开(公告)日：2014-08-26

申请号：US13324368

申请日：2011-12-13

申请人： Yao Rong Wang ,  Lalit Keshav Mestha

发明人： Yao Rong Wang ,  Lalit Keshav Mestha

IPC分类号： G06K9/00

CPC分类号： G06K9/2018 ,  G06K9/6857 ,  G06K9/72 ,  G06K2209/09

摘要： A system and method for post-processing a multi-spectral image which has already been processed for pixel classification. A binary image is received which contains pixels that have been classified using a pixel classification method. Each pixel in the image has an associated intensity value and has a pixel value of 1 or 0 depending on whether the pixel has been classified as a material of interest or not. The image is divided into a plurality of blocks of pixels. On a block by block basis, pixel values in a block are changed according to a threshold-based filtering criteria such that pixels in the same block all have the same binary value. Once all the blocks have been processed, contiguous pixels having the same binary value are grouped to form separate objects. In such a manner, pixel classification errors in the post-processed binary image can be reduced.

摘要翻译： 一种用于后处理已经被处理用于像素分类的多光谱图像的系统和方法。 接收包含使用像素分类方法分类的像素的二进制图像。 图像中的每个像素具有相关联的强度值，并且具有像素值为1或0的取决于像素是否被分类为感兴趣的材料。 该图像被分成多个像素块。 在逐块的基础上，根据基于阈值的滤波准则改变块中的像素值，使得相同块中的像素都具有相同的二进制值。 一旦所有块被处理，具有相同二进制值的连续像素被分组以形成分离的对象。 以这种方式，可以减少后处理二进制图像中的像素分类误差。

公开(公告)号：US08773446B2

公开(公告)日：2014-07-08

申请号：US13023798

申请日：2011-02-09

申请人： Shanmuga-Nathan Gnanasambandam ,  Lalit Keshav Mestha

发明人： Shanmuga-Nathan Gnanasambandam ,  Lalit Keshav Mestha

IPC分类号： G06F15/80

CPC分类号： G06T1/20

摘要： What is disclosed is a novel system and method for parallel processing of intra-image data in a distributed computing environment. A generic architecture and method are presented which collectively facilitate image segmentation and block sorting and merging operations with a certain level of synchronization in a parallel image processing environment which has been traditionally difficult to parallelize. The present system and method enables pixel-level processing at higher speeds thus making it a viable service for a print/copy job document reproduction environment. The teachings hereof have been simulated on a cloud-based computing environment with a demonstrable increase of ≈2× with nominal 8-way parallelism, and an increase of ≈20×-100× on a graphics processor. In addition to production and office scenarios where intra-image processing are likely to be performed, these teachings are applicable to other domains where high-speed video and audio processing are desirable.

摘要翻译： 公开的是用于在分布式计算环境中并行处理图像内数据的新型系统和方法。 提出了一种通常的架构和方法，其在传统上难以并行化的并行图像处理环境中共同促进图像分割和块排序和合并操作与一定水平的同步。 本系统和方法能够以更高的速度进行像素级处理，从而使其成为打印/复印作业文档再现环境的可行服务。 本文的教导已经在基于云计算环境下进行了模拟，具有标称8路并行性的≈2×的可见增加，并且在图形处理器上增加了≈20×-100×。 除了可能执行图像内处理的生产和办公场景之外，这些教导也适用于需要高速视频和音频处理的其他领域。

公开(公告)号：US08441680B2

公开(公告)日：2013-05-14

申请号：US12507515

申请日：2009-07-22

申请人： Yao Rong Wang ,  Lalit Keshav Mestha

发明人： Yao Rong Wang ,  Lalit Keshav Mestha

IPC分类号： H04N1/60

CPC分类号： H04N1/407

摘要： A method for calibrating an image printing system that includes a plurality of parallel printers, where each of the printers has a minimum luminance value. The method includes determining a minimum luminance value profile for the plurality of printers in the image printing system based on the minimum luminance values of each of the printers in the image printing system, determining a black point compensation function based on the determined minimum luminance value profile, adjusting luminance values for input image data using the determined black point compensation function, and rendering, with the parallel printers, images on substrates based on the input image data with adjusted luminance levels.

摘要翻译： 一种用于校准包括多个平行打印机的图像打印系统的方法，其中每个打印机具有最小的亮度值。 该方法包括基于图像打印系统中的每个打印机的最小亮度值确定图像打印系统中的多个打印机的最小亮度值分布，基于所确定的最小亮度值分布来确定黑点补偿功能 使用确定的黑点补偿功能调整输入图像数据的亮度值，并且使用并行打印机，基于具有调整的亮度水平的输入图像数据来渲染基板上的图像。

公开(公告)号：US08335017B1

公开(公告)日：2012-12-18

申请号：US13167349

申请日：2011-06-23

申请人： Alvaro Enrique Gil ,  Lalit Keshav Mestha ,  Wencheng Wu ,  Edul N. Dalal

发明人： Alvaro Enrique Gil ,  Lalit Keshav Mestha ,  Wencheng Wu ,  Edul N. Dalal

IPC分类号： H04N1/46

CPC分类号： H04N1/622

摘要： What is disclosed is a feedback control based system and method for selecting spot color recipes for improved spot color rendition while simultaneously minimizing a function of image quality attributes formed with states defined as vectors such as L*, a*, b*, mottle, graininess, etc. Color is measured with an in-line spectrophotometer or with a full/partial width array. If the sensor is not available, then a model of the print device is used to optimize the function of image quality attributes. In one example embodiment, a spot color of interest is selected along with a set of image quality attributes to be improved for the spot colors of interest. Set points for process actuators and color recipes of the color marking device are adjusted such that a function of the image quality attributes is minimized when the spot color is rendered on the device. Various workflows are disclosed.

摘要翻译： 所公开的是基于反馈控制的系统和方法，用于选择改进的专色再现的专色配方，同时最小化由定义为诸如L *，a *，b *，斑点，颗粒度的矢量形成的图像质量属性的功能 等等。使用直列分光光度计或全/部分宽度阵列测量颜色。 如果传感器不可用，则使用打印设备的型号来优化图像质量属性的功能。 在一个示例性实施例中，选择感兴趣的专色连同一组图像质量属性以便针对感兴趣的专色进行改进。 调整颜色标记装置的处理执行器和颜色配置的设定点，使得当在设备上呈现专色时，图像质量属性的功能被最小化。 公开了各种工作流程。

公开(公告)号：US08314979B2

公开(公告)日：2012-11-20

申请号：US12274980

申请日：2008-11-20

申请人： Lalit Keshav Mestha ,  Matthew F. Hoffmann

发明人： Lalit Keshav Mestha ,  Matthew F. Hoffmann

IPC分类号： G03F3/08 ,  H04N1/60 ,  G06K9/00

CPC分类号： H04N1/603

摘要： Disclosed are color management methods and systems to adaptively tune colors for one or more image marking devices. Specifically, exemplary embodiments include methods and systems to create profiles for preference color matching. For example, Lab values associated with target node colors can be warped using a predefined function for special regions of interest.

摘要翻译： 公开了用于自适应地调整一个或多个图像标记装置的颜色的颜色管理方法和系统。 具体地，示例性实施例包括用于创建偏好颜色匹配的简档的方法和系统。 例如，与目标节点颜色相关联的实验室值可以使用特定感兴趣区域的预定义函数进行扭曲。

公开(公告)号：US20120147194A1

公开(公告)日：2012-06-14

申请号：US12967775

申请日：2010-12-14

申请人： Yao Rong Wang ,  Zhigang Fan ,  Lalit Keshav Mestha

发明人： Yao Rong Wang ,  Zhigang Fan ,  Lalit Keshav Mestha

IPC分类号： H04N5/33 ,  G06K9/46

CPC分类号： H04N5/33 ,  G06K9/00369 ,  G06K9/00785 ,  G06K9/00805 ,  G06K9/00838 ,  G06K9/2018

摘要： What is disclosed is a novel system and method for determining the number of persons in an IR image obtained using an IR imaging system. The present method separates a human from the surrounding background via a set of particularly formed intensity ratios. Quantities derived from these ratios and threshold values are used to selectively classify whether a pixel in the IR image is from a human or from a non-human. Based upon the classification of the various pixels in the IR image, the number of persons is determined. Various embodiments are disclosed.

摘要翻译： 公开的是用于确定使用IR成像系统获得的IR图像中的人数的新颖系统和方法。 本方法通过一组特别形成的强度比将人与周围背景分离。 使用从这些比率和阈值导出的量来选择性地分类IR图像中的像素是来自人还是来自非人。 基于IR图像中的各种像素的分类，确定人数。 公开了各种实施例。