公开(公告)号：US08531734B2

公开(公告)日：2013-09-10

申请号：US13023202

申请日：2011-02-08

Applicant: Lalit Keshav Mestha ,  Edul N. Dalal ,  Wencheng Wu

Inventor： Lalit Keshav Mestha ,  Edul N. Dalal ,  Wencheng Wu

IPC: G06T5/00

CPC classification number: H04N1/6033

Abstract: What is disclosed is a system and method for improving image quality of a color of interest using a cluster model in a color printing system involving the following. First, one or more image quality attributes are selected for a target color marking device. A cluster model is received which comprises a plurality of clusters with each cluster having an associated transform. The cluster model is used to estimate an image quality parameter. The image quality parameter is used to select colorant sets and thereby to improve the image quality in the marking device. Various embodiments of the use of cluster models are disclosed.

Abstract translation: 公开的是一种用于在涉及以下的彩色打印系统中使用聚类模型来改善感兴趣的颜色的图像质量的系统和方法。 首先，为目标颜色标记装置选择一个或多个图像质量属性。 接收到包括多个聚类的聚类模型，每个聚类具有相关联的变换。 聚类模型用于估计图像质量参数。 图像质量参数用于选择着色剂组，从而提高标记装置中的图像质量。 公开了使用群集模型的各种实施例。

公开(公告)号：US08526727B2

公开(公告)日：2013-09-03

申请号：US12815823

申请日：2010-06-15

Applicant: Martin S. Maltz ,  Raja Bala ,  Lalit Keshav Mestha

Inventor： Martin S. Maltz ,  Raja Bala ,  Lalit Keshav Mestha

IPC: G06K9/00 ,  G06K9/36 ,  G06K1/00 ,  G06F15/00 ,  H04N1/60 ,  G03F3/08 ,  G09G5/02

CPC classification number: G06K9/00 ,  G06T11/001

Abstract: A 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.

Abstract translation: 一种用于生成用于在彩色成像系统内实现颜色变换的分层LUT的系统和方法。 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：US08509495B2

公开(公告)日：2013-08-13

申请号：US13087850

申请日：2011-04-15

Applicant: Beilei Xu ,  Lalit Keshav Mestha

Inventor： Beilei Xu ,  Lalit Keshav Mestha

IPC: G06K9/00

CPC classification number: G06K9/00013 ,  G06K9/2036 ,  G06K2009/00932

Abstract: What is disclosed is a novel system and method for identifying an individual in an IR image involves the following. Intensity values are collected at N wavelengths for each pixel in an IR video-based image. The intensity values are collected using an IR imaging system having an IR detector and an IR Illuminator. The intensity values are then used to identify pixels of human skin in the IR image. If human skin is identified in the IR image then, the human hand is identified in the IR image from the human skin to distinguish the hand from the background. Vein patterns in the hand are then located and extracted. A reference vein pattern is retrieved from a database of known vein patterns for individuals, and a comparison is made to determine a match. If a match is determined, then the individual in the captured IR image can be identified.

Abstract translation: 所公开的是用于识别IR图像中的个体的新颖系统和方法涉及以下。 在基于IR视频的图像中针对每个像素在N个波长处收集强度值。 使用具有IR检测器和IR照明器的IR成像系统收集强度值。 然后强度值用于识别IR图像中人体皮肤的像素。 如果在IR图像中识别出人类皮肤，则人类的手在来自人体皮肤的IR图像中被识别，以将手与背景区分开。 然后定位和提取手中的静脉图案。 从个人的已知静脉图案的数据库检索参考静脉图案，并进行比较以确定匹配。 如果确定匹配，则可以识别捕获的IR图像中的个体。

公开(公告)号：US08457415B1

公开(公告)日：2013-06-04

申请号：US13324433

申请日：2011-12-13

Applicant: Yao Rong Wang ,  Lalit Keshav Mestha

Inventor： Yao Rong Wang ,  Lalit Keshav Mestha

IPC: G06K9/68

CPC classification number: G06K9/72 ,  G06K9/4652

Abstract: What is disclosed is 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. A block of size m×n is defined. 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. The block is then shifted by k pixels and pixel processing repeats until all pixels have been processed. Once all blocks have been processed, contiguous pixels having the same binary value are grouped to form objects. In such a manner, pixel classification errors are reduced.

Abstract translation: 所公开的是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。 定义一个大小为m×n的块。 块中的像素值根据基于阈值的滤波准则而改变，使得相同块中的像素都具有相同的二进制值。 然后将块移动k个像素，并重复像素处理直到所有像素都被处理。 一旦所有块都被处理，具有相同二进制值的连续像素被分组以形成对象。 以这种方式，减少像素分类误差。

公开(公告)号：US08456698B2

公开(公告)日：2013-06-04

申请号：US12533542

申请日：2009-07-31

Applicant: Alvaro E. Gil ,  Yao Rong Wang ,  Lalit Keshav Mestha

Inventor： Alvaro E. Gil ,  Yao Rong Wang ,  Lalit Keshav Mestha

IPC: G06F15/00 ,  H04N1/40 ,  G06K9/00

CPC classification number: H04N1/54 ,  H04N1/6052 ,  H04N1/6088

Abstract: A methodology is disclosed to achieve adaptive illumination independent matching of out-of-gamut spot colors. In one embodiment, the methodology includes an iterative process to determine a variety device specific recipes for out-of-gamut spot colors across different illumination spectra and gamut mapping techniques, and then automatically choosing and/or recommending the optimal recipe and gamut mapping technique that provides the lowest color dispersion across a variety of illuminants under consideration.

Abstract translation: 公开了一种用于实现色域外色彩的自适应照明独立匹配的方法。 在一个实施例中，该方法包括迭代过程，以确定跨不同照明光谱和色域映射技术的色域外色彩的特定配方，然后自动选择和/或推荐最佳配方和色域映射技术， 在考虑的各种光源下提供最低的色散。

公开(公告)号：US08441691B2

公开(公告)日：2013-05-14

申请号：US12793864

申请日：2010-06-04

Applicant: Lalit Keshav Mestha ,  Prudhvi Krishna Gurram

Inventor： Lalit Keshav Mestha ,  Prudhvi Krishna Gurram

IPC: G06K15/00 ,  G06T5/00 ,  H04N1/407 ,  H04N1/409 ,  G06F15/00 ,  G06K1/00 ,  G06K15/02

CPC classification number: H04N1/6025

Abstract: What is disclosed is a system and method for generating a destination profile LUT. In a manner more fully described herein, a high resolution LUT (e.g., 100-cube LUT) is received. Regions of high curvature of the gamut of an image output device are identified. A non-parametric dynamic optimization node selection method is utilized to select a subset of nodes from the high resolution profile LUT which captures these nonlinearities. Down-sampling the high resolution LUT produces a low resolution LUT. The low resolution LUT is up-sampled to a size of the high resolution LUT to obtain a reconstructed LUT. An error is then calculated between the reconstructed LUT and high resolution LUT. The process of node selection is iteratively repeated until all the subsets of nodes are considered. A destination profile LUT is then generated from the subset of nodes with the least error.

Abstract translation: 公开的是用于生成目的地简档LUT的系统和方法。 以这里更全面地描述的方式，接收高分辨率LUT（例如，100立方体LUT）。 识别图像输出装置的色域的高曲率区域。 使用非参数动态优化节点选择方法从捕获这些非线性的高分辨率轮廓LUT中选择节点子集。 对高分辨率LUT进行下采样产生低分辨率LUT。 低分辨率LUT被上采样到高分辨率LUT的大小以获得重构的LUT。 然后在重建的LUT和高分辨率LUT之间计算出一个误差。 循环重复节点选择的过程，直到考虑节点的所有子集为止。 然后从具有最小误差的节点子集生成目标简档LUT。

公开(公告)号：US08379267B2

公开(公告)日：2013-02-19

申请号：US12630093

申请日：2009-12-03

Applicant: Lalit Keshav Mestha ,  Alvaro Enrique Gil

Inventor： Lalit Keshav Mestha ,  Alvaro Enrique Gil

IPC: H04N1/60

CPC classification number: H04N1/6058

Abstract: What is disclosed is a novel system and method for retrieving a gamut mapping for a color device. A ray-based model is derived from a system estimation of either a seed profile or a seed device. The model is hard coded inside a run-time ICC profile creation algorithm. The runtime profile generation code can be optimized for a variety of gamut mapping scenarios. The generated profile is provided to an imaging system wherein out-of-gamut colors are mapped to the color gamut of the host device. The present method provides an accurate way to reproduce colors of images by retrieving the gamut mapping from profiles or from the color device that use destination profiles for rendering images.

Abstract translation: 公开的是用于检索彩色设备的色域映射的新颖系统和方法。 基于射线的模型是从种子轮廓或种子装置的系统估计得出的。 该模型在运行时ICC配置文件创建算法中进行硬编码。 运行时配置文件生成代码可针对各种色域映射方案进行优化。 生成的轮廓被提供给成像系统，其中色域外色彩被映射到主机设备的色域。 本方法提供了通过从配置文件或从使用用于渲染图像的目的地配置文件的彩色设备检索色域映射来再现图像颜色的准确方法。

公开(公告)号：US08351081B2

公开(公告)日：2013-01-08

申请号：US12839620

申请日：2010-07-20

Applicant: Jack Gaynor Elliot ,  Lalit Keshav Mestha ,  Peter Paul ,  David C. Craig ,  Brian Robert Conrow ,  Christine Ann Steurrys

Inventor： Jack Gaynor Elliot ,  Lalit Keshav Mestha ,  Peter Paul ,  David C. Craig ,  Brian Robert Conrow ,  Christine Ann Steurrys

IPC: G06F15/00

CPC classification number: H04N1/6033 ,  H04N1/6036

Abstract: What is disclosed is a novel system and method for xerographic Dmax control based upon measurements made on the printed paper using an inline spectrophotometer (ILS) or similar device. The disclosed method is based upon directly measuring the color to actuator sensitivity. Each of the separations is controlled independently using an actuator specific to that color separation. The present method is effective at controlling the color of the solid primaries. The fact that the vector of change is highly correlated with solid color variation seen in the field suggests that the teachings hereof effectively increase the solid color stability. Increased solid color stability increases the color stability throughout the printer gamut and the stability of the gamut boundaries, which increases the robustness of gamut mapping algorithms. Advantageously, the present method can be combined with existing ILS-based maintenance architectures.

公开(公告)号：US08294956B2

公开(公告)日：2012-10-23

申请号：US12260476

申请日：2008-10-29

Applicant: Lalit Keshav Mestha ,  Peter Stanley Fisher

Inventor： Lalit Keshav Mestha ,  Peter Stanley Fisher

IPC: G06K9/00 ,  G06K15/02

CPC classification number: B41M3/14 ,  G06K1/121 ,  G06K9/2018 ,  G06K19/06046

Abstract: The present application discloses a system, method and device for placing substantially invisible marks comprising alphanumeric characters, symbols, or bar codes, on a page using clear ink or toner, which may then be read by a spectrophotometer. Such substantially invisible marks are not viewable to the unaided eye of a human observer, do not distract a viewer, and allow the viewer to focus their attention on the printed matter and text of interest to the viewer.

Abstract translation: 本申请公开了一种用于使用清晰的墨水或调色剂将基本上包含字母数字字符，符号或条形码的不可见标记放置在页面上的系统，方法和装置，然后可以由分光光度计读取。 这种基本上不可见的标记对于人类观察者的肉眼是不可见的，不要分散观看者的注意力，并且允许观看者将注意力集中在观看者的感兴趣的打印物和文本上。

公开(公告)号：US08294948B2

公开(公告)日：2012-10-23

申请号：US12127705

申请日：2008-05-27

Applicant: Lalit Keshav Mestha ,  Palghat Ramesh

Inventor： Lalit Keshav Mestha ,  Palghat Ramesh

IPC: G06F15/00

CPC classification number: G03G13/01 ,  H04N1/4078 ,  H04N1/54 ,  H04N1/6058

Abstract: A color management system is provided for enabling imaging of selected colors called spot colors by dynamically adjusting the normal printer gamut to achieve a color gamut extension. Developed toner mass may be increased or decreased by changing ROS laser intensity. Such adjustment can occur on a pixel-by-pixel basis for within page and within sections of the image gamut extension.

Abstract translation: 提供了一种颜色管理系统，用于通过动态地调整正常的打印机色域以实现色域扩展来使所选择的被称为专色的颜色成像。 通过改变ROS激光强度可以增加或减少显影的调色剂质量。 这样的调整可以在逐个像素的范围内在页面内部以及在图像色域扩展的部分内发生。