公开(公告)号：US20080259374A1

公开(公告)日：2008-10-23

申请号：US11737576

申请日：2007-04-19

Applicant: Lalit Keshav Mestha ,  Tonya L. Love ,  Dennis M. Diehl ,  Daniel A. Robbins

Inventor： Lalit Keshav Mestha ,  Tonya L. Love ,  Dennis M. Diehl ,  Daniel A. Robbins

IPC: G06F3/12

CPC classification number: G01J3/46 ,  G01J3/463 ,  H04N1/6033

Abstract: An alogrithmic method is identified for compensating for thermochromaticity errors in insitu spectral color measurements of a color printing device. A difference is mapped between spectral measurements of a printed color generated by the color printing device measured at a first or hot temperature and at a second or cool ambient temperature where the mapping comprises a referenceable characteristic of the color printing device. The spectrophotometric measurement of a hot color is compared with colors obtained with thermochromaticity compensation matrix to assess if the measured color corresponds to the desired color which will result when cooled to ambient temperature.

Abstract translation: 识别出一种用于补偿彩色印刷装置的本色谱色彩测量中的热色差误差的方法。 在由第一或热温度下测量的彩色打印装置产生的打印颜色的光谱测量值和第二或者较低的环境温度之间映射差异，其中映射包括彩色打印装置的可参考特性。 将热色的分光光度测量与用热色调补偿基质获得的颜色进行比较，以评估测量的颜色是否对应于当冷却至环境温度时将产生的所需颜色。

公开(公告)号：US20080137110A1

公开(公告)日：2008-06-12

申请号：US11636747

申请日：2006-12-11

Applicant: Lalit Keshav Mestha ,  Yao Rong Wang ,  Zhigang Fan ,  Alvaro Enrique Gil

Inventor： Lalit Keshav Mestha ,  Yao Rong Wang ,  Zhigang Fan ,  Alvaro Enrique Gil

IPC: G06F15/00

CPC classification number: H04N1/6033 ,  H04N1/6097

Abstract: Disclosed herein are optimal or near optimal algorithms implemented as software tools that will allow the user/machine to identify optimal media out of the job set automatically. There are at least two main process steps to the exemplary embodiment. The first step involves the off-line characterization of the printing/image rendering system that will be used to extract the principal basis vectors from the experimental data. The second step involves the run-time mode, in which the pre-characterized basis vectors are used in conjunction with an optimal algorithm that will identify the media for re-calibration/re-characterization from the group of media set that the customer is interested to print. The optimal algorithm performs the combinatorial search every time the customer wishes to select the media. Once the optimal media is selected, the customer or the machine can print color patches (which are also optimal set) and execute the rest of the processing to reconstruct the best color management LUTs.

Abstract translation: 这里公开的是作为软件工具实现的最佳或近似最优算法，其将允许用户/机器自动地识别作业集合中的最佳媒体。 至于示例性实施例的至少两个主要处理步骤。 第一步涉及打印/图像渲染系统的离线表征，该系统将用于从实验数据中提取主基础向量。 第二步涉及运行时模式，其中预特征基本向量与最佳算法结合使用，该算法将识别媒体用于从客户感兴趣的媒体集合进行重新校准/重新表征 打印。 每当客户希望选择媒体时，最优算法执行组合搜索。 一旦选择了最佳介质，客户或机器可以打印色块（也是最佳组合），并执行其余处理以重构最佳色彩管理LUT。

公开(公告)号：US09301710B2

公开(公告)日：2016-04-05

申请号：US13529648

申请日：2012-06-21

Applicant: Lalit Keshav Mestha ,  Edgar A. Bernal ,  Beilei Xu

Inventor： Lalit Keshav Mestha ,  Edgar A. Bernal ,  Beilei Xu

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

CPC classification number: 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

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US09171196B2

公开(公告)日：2015-10-27

申请号：US13416436

申请日：2012-03-09

Applicant: Yao Rong Wang ,  Lalit Keshav Mestha ,  Beilei Xu ,  Raja Bala ,  Graham Pennington

Inventor： Yao Rong Wang ,  Lalit Keshav Mestha ,  Beilei Xu ,  Raja Bala ,  Graham Pennington

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

CPC classification number: G06K9/00255 ,  G06K9/00838 ,  G06K9/2018 ,  H04N5/33

Abstract: 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.

Abstract translation: 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：US09155475B2

公开(公告)日：2015-10-13

申请号：US13533605

申请日：2012-06-26

Applicant: Beilei Xu ,  Lalit Keshav Mestha ,  Edgar A. Bernal

Inventor： Beilei Xu ,  Lalit Keshav Mestha ,  Edgar A. Bernal

IPC: H04N5/232 ,  A61B5/00 ,  H04N5/225 ,  H04N5/235

CPC classification number: A61B5/0077 ,  A61B5/0035 ,  A61B5/0073 ,  H04N5/2256 ,  H04N5/23296 ,  H04N5/2354

Abstract: What is disclosed is a system and method for enabling hybrid video capture of a scene being illuminated with structured and unstructured illumination sources over a wavelength range of interest that significantly intersects with each other. In one embodiment, the present system comprises a video capture device for capturing video of a scene being actively illuminated by both a structured and unstructured illumination source; a controller for controlling a manipulation of at least one structured and at least one unstructured illumination sources during capture of the video by the video capture device; and a processor in communication with the controller, the processor executing machine readable program instructions effectuating the manipulation. Various embodiments are disclosed.

Abstract translation: 所公开的是一种系统和方法，用于实现在结构化和非结构化照明源上照射的场景的混合视频捕获，所述结构化和非结构化照明源在相互显着相交的感兴趣的波长范围内。 在一个实施例中，本系统包括用于捕获被结构化和非结构化照明源主动照亮的场景的视频的视频捕获设备; 控制器，用于在由所述视频捕捉设备拍摄所述视频期间控制对至少一个结构化和至少一个非结构化照明源的操纵; 以及与所述控制器通信的处理器，所述处理器执行执行所述操作的机器可读程序指令。 公开了各种实施例。

公开(公告)号：US09025024B2

公开(公告)日：2015-05-05

申请号：US13247343

申请日：2011-09-28

Applicant: Beilei Xu ,  Wencheng Wu ,  Lalit Keshav Mestha ,  Graham Pennington

Inventor： Beilei Xu ,  Wencheng Wu ,  Lalit Keshav Mestha ,  Graham Pennington

IPC: H04N7/18 ,  G06K9/20 ,  H04N5/232 ,  H04N5/33

CPC classification number: G06K9/2018 ,  H04N5/23206 ,  H04N5/23219 ,  H04N5/332

Abstract: 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.

Abstract translation: 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：US08811664B2

公开(公告)日：2014-08-19

申请号：US13312414

申请日：2011-12-06

Applicant: Edul N. Dalal ,  Peter Paul ,  Lalit Keshav Mestha ,  Abu Saeed Islam

Inventor： Edul N. Dalal ,  Peter Paul ,  Lalit Keshav Mestha ,  Abu Saeed Islam

IPC: G06K9/00 ,  G06K9/46

CPC classification number: G06K9/00362 ,  G06K9/2018 ,  H04N5/33

Abstract: What is disclosed is a method for vehicle occupancy detection using a single band infrared imaging system. First, an infrared image of a vehicle intended to be processed for human occupancy detection is captured using a single band infrared camera set to a predefined wavelength band. A candidate sub-image is identified within the captured image. A cumulative histogram is formed using the reflectance values of each pixel in the candidate region. A threshold reflectance value is then determined from the cumulative histogram using a pre-defined cumulative occurrence fraction value which corresponds to a value equivalent to an average sized human face. Embodiments for setting the threshold reflectance value are disclosed. Thereafter, human occupants can be distinguished in the image from the vehicle's interior by comparing pixel reflectances in the sub-image against the threshold reflectance value.

Abstract translation: 所公开的是使用单频带红外成像系统的车辆占用检测方法。 首先，使用设定为预定波长带的单频带红外线摄像机来捕捉旨在进行人身携带检测的车辆的红外图像。 在拍摄图像内识别候选子图像。 使用候选区域中的每个像素的反射率值形成累积直方图。 然后使用对应于等于平均大小的人脸的值的预定义累积出现分数值，从累积直方图确定阈值反射率值。 公开了设定阈值反射率值的实施例。 此后，通过将子图像中的像素反射率与阈值反射率值进行比较，可以将图像与车辆内部区分开。

公开(公告)号：US08617081B2

公开(公告)日：2013-12-31

申请号：US13247683

申请日：2011-09-28

Applicant: Lalit Keshav Mestha ,  Survi Kyal ,  Gill Rafael Tsouri ,  Sohail A. Dianat ,  Beilei Xu

Inventor： Lalit Keshav Mestha ,  Survi Kyal ,  Gill Rafael Tsouri ,  Sohail A. Dianat ,  Beilei Xu

IPC: A61B5/02

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

Abstract: 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.

Abstract translation: 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：US08610959B2

公开(公告)日：2013-12-17

申请号：US13029753

申请日：2011-02-17

Applicant: Yao Rong Wang ,  Lalit Keshav Mestha ,  Martin S. Maltz

Inventor： Yao Rong Wang ,  Lalit Keshav Mestha ,  Martin S. Maltz

IPC: H04N1/40

CPC classification number: H04N1/6016 ,  H04N1/40006

Abstract: What is disclosed is a system and method which addresses the problem of inheriting color management intent from a fleet color management LUT into a 4-to-4 cascaded LUT. The LUT is updated starting with a set of patches that either form a uniform or non-uniform grid of the LUT or can be projected to a uniform or non-uniform grid in the CMYK space using, e.g., PCA. A set of L*a*b* target as well a variable that serve the purpose of preserving the GCR and other elements of the fleet profile is obtained by passing the set of CMYK values to the fleet printer model. By iterating on the printer (or the printer model of the engine at the moment of the engine change) and converging to the targets, the engine device cmyk set is obtained. The LUT is formed between the uniform or non-uniform gridded CMYK and the device cmyk.

Abstract translation: 公开的是一种系统和方法，其解决将车队颜色管理LUT的颜色管理意图从继承到4对4级联LUT的问题。 LUT以从LUT的统一或非均匀网格形成的一组补丁开始更新，或者使用例如PCA将其投影到CMYK空间中的均匀或非均匀网格。 通过将一组CMYK值传递给车队打印机模型，获得一组L * a * b *目标以及用于保存GCR和船队简档的其他元素的变量。 通过在打印机（或发动机更换时刻的发动机的打印机型号）上迭代并收敛到目标，获得发动机装置cmyk组。 LUT在均匀或不均匀的网格CMYK和设备cmyk之间形成。

公开(公告)号：US08600227B2

公开(公告)日：2013-12-03

申请号：US13239642

申请日：2011-09-22

Applicant: Beilei Xu ,  Lalit Keshav Mestha ,  Yao Rong Wang ,  Peter Paul

Inventor： Beilei Xu ,  Lalit Keshav Mestha ,  Yao Rong Wang ,  Peter Paul

IPC: G03B11/00

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

Abstract: A filter array for a multi-resolution multi-spectral camera system is described 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.

Abstract translation: 描述了用于多分辨率多光谱照相机系统的滤光器阵列，其不仅在多个波长带同时捕获2D图像，而且以满足空间特征提取需求的空间分辨率捕获。 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。