公开(公告)号：US07869748B2

公开(公告)日：2011-01-11

申请号：US12208116

申请日：2008-09-10

申请人： Lalit Keshav Mestha ,  John G. Shaw ,  Palghat Ramesh ,  Allen Ted Retzlaff, Jr. ,  Peter Michael Gulvin ,  Pinyen Lin ,  Baomin Xu

发明人： Lalit Keshav Mestha ,  John G. Shaw ,  Palghat Ramesh ,  Allen Ted Retzlaff, Jr. ,  Peter Michael Gulvin ,  Pinyen Lin ,  Baomin Xu

IPC分类号： G03G15/08 ,  G03G15/16

CPC分类号： G03G15/0818 ,  G03G2215/00957 ,  G03G2215/0653 ,  G03G2215/1614

摘要： Exemplary embodiments provide a direct imaging system and methods for direct marking an image using the system. The disclosed direct imaging system can eliminate the use of at least one of a charge, and/or exposure subsystems in an electrostatographic machine and related processes. Specifically, the direct imaging system can include a direct marking substrate (e.g., a printing substrate) and a development roll member closely spaced from the direct marking substrate. In one embodiment, the development roll member can include a plurality of actuator cells with each actuator cell controllably addressable to eject one or more toner particles adhered thereto. The ejected toner particles can transit the space between the donor roll member and the direct marking substrate, and thereby marking onto the direct marking substrate forming an image.

摘要翻译： 示例性实施例提供直接成像系统和用于使用该系统直接标记图像的方法。 所公开的直接成像系统可以消除在静电放电机中的充电和/或曝光子系统中的至少一个的使用和相关过程。 具体地，直接成像系统可以包括直接标记基板（例如印刷基板）和与直接标记基板紧密间隔的显影辊构件。 在一个实施例中，显影辊构件可以包括多个致动器单元，每个致动器单元可控制地寻址以喷射粘附到其上的一个或多个调色剂颗粒。 排出的调色剂颗粒可以通过供体辊构件和直接标记衬底之间的空间，从而将标记到形成图像的直接标记衬底上。

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：US07768672B2

公开(公告)日：2010-08-03

申请号：US11906854

申请日：2007-10-04

申请人： Alvaro Enrique Gil ,  Lalit Keshav Mestha ,  Matthew F. Hoffmann

发明人： Alvaro Enrique Gil ,  Lalit Keshav Mestha ,  Matthew F. Hoffmann

IPC分类号： H04N1/60 ,  H04N1/46 ,  G03F3/08 ,  G06K9/00

CPC分类号： H04N1/6033

摘要： This disclosure relates generally to methods and systems for color management in image/text printing or display systems, and more particularly to a system and method for automatically achieving spot color production through use of a plurality of gain matrices per spot color in determining spot color coordinates. Furthermore, this disclosure provides a means for mapping out-of-gamut target spot colors substantially near a boundary of the gamut of an image output device, such as a printer or display.

摘要翻译： 本公开一般涉及图像/文本打印或显示系统中的颜色管理的方法和系统，更具体地涉及一种通过在确定专色坐标中通过使用多个增益矩阵来自动实现专色生成的系统和方法 。 此外，本公开提供了一种用于映射基本上在诸如打印机或显示器的图像输出设备的色域边界附近的色域外的目标专色的方法。

公开(公告)号：US20090296114A1

公开(公告)日：2009-12-03

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： H04N1/60

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：US20090190965A1

公开(公告)日：2009-07-30

申请号：US12208050

申请日：2008-09-10

申请人： Lalit Keshav Mestha ,  Palghat Ramesh ,  Joel A. Kubby ,  Dale R. Mashtare

发明人： Lalit Keshav Mestha ,  Palghat Ramesh ,  Joel A. Kubby ,  Dale R. Mashtare

IPC分类号： G03G15/08

CPC分类号： G03G15/0818 ,  G03G2215/00957 ,  G03G2215/0653 ,  G03G2215/1614

摘要： Exemplary embodiments provide a roll member that includes one or more controllable cells and methods for making and using the roll member to control an image (or toner) state thereon. The controllable cells can be disposed on a roll substrate and configured in a manner that each controllable cell can be addressed individually and/or as groups. Each controllable cell can be addressable to provide a surface vibration to release toner particles adhered/attracted thereto and can also be capable of sensing the toner state of the roll member and thus to control the image or toner state. In an exemplary embodiment, the disclosed roll member can be used as a donor roll for a development system of an electrophotographic printing machine to create controlled and desired toner powder cloud for high quality image development.

摘要翻译： 示例性实施例提供了包括一个或多个可控电池的辊构件和用于制造和使用辊构件以控制其上的图像（或调色剂）状态的方法。 可控电池可以设置在辊衬底上并且以使每个可控电池单独地和/或以组方式来寻址的方式配置。 每个可控电池可以寻址以提供表面振动以释放附着/吸引到其上的调色剂颗粒，并且还能够感测辊构件的调色剂状态，从而控制图像或调色剂状态。 在一个示例性实施例中，所公开的辊构件可用作电子照相印刷机的显影系统的供体辊，以产生受控和期望的调色剂粉末，用于高质量图像显影。

公开(公告)号：US07555396B2

公开(公告)日：2009-06-30

申请号：US11086087

申请日：2005-03-22

申请人： Lalit Keshav Mestha

发明人： Lalit Keshav Mestha

IPC分类号： G01D18/00

CPC分类号： G01J3/50 ,  G01J3/02 ,  G01J3/0275 ,  G01J3/501 ,  G01J3/524

摘要： To generate a reference database for a particular sensor in a multiple LED spectrophotometric system with a reduced number of test measurements taken from training samples, a first set of reflectance reference measurements are generated from a test target on to a reference sensor from a plurality of different LED emissions. A first spectral reconstruction reference matrix is computed by performing an operational characterization of the reference sensor from the first set of reflectance reference measurements. A second set of reflectance reference measurements from the test target is generated from a second subject sensor whose operation is to be personalized by the objective reference database. The second set of reflectance reference measurements are less in number than the first set. A second reconstruction matrix is computed by performing an operational characterization of the subject sensor from the second set of measurements. The second reconstruction matrix is adjusted by relating the second set of reflectance measurements to a set of corresponding reflectance measurements of the reference sensor, whereby the adjusting of the second matrix comprises computing an optimal solution spectral reconstruction matrix for the second sensor. The reference database is generated from the optimal solution spectral reconstruction matrix.

摘要翻译： 为了在具有从训练样本获得的测试测量数量减少的多个LED分光光度系统中产生用于特定传感器的参考数据库，从测试目标产生第一组反射参考测量值到多个不同的参考传感器 LED排放。 通过从第一组反射参考测量值执行参考传感器的操作表征来计算第一光谱重构参考矩阵。 来自测试目标的第二组反射参考测量从第二目标传感器产生，其第二对象传感器的操作将由目标参考数据库进行个性化。 第二组反射参考测量数量少于第一组。 通过从第二组测量执行对象传感器的操作表征来计算第二重建矩阵。 通过将第二组反射率测量值与参考传感器的一组对应的反射率测量值相关联来调整第二重构矩阵，由此第二矩阵的调整包括计算第二传感器的最优解谱重构矩阵。 参考数据库是从最优解谱重建矩阵生成的。

公开(公告)号：US09066054B2

公开(公告)日：2015-06-23

申请号：US12199392

申请日：2008-08-27

申请人： Lalit Keshav Mestha ,  Sohail A. Dianat

发明人： Lalit Keshav Mestha ,  Sohail A. Dianat

IPC分类号： G06F15/00 ,  H04N1/60 ,  H04N1/00 ,  H04N1/56 ,  G06K1/00

CPC分类号： H04N1/6072 ,  H04N1/00957 ,  H04N1/56 ,  H04N2201/0082 ,  H04N2201/3256

摘要： A system and method for rendering an image provide for segmenting the image into a plurality of segments based on image content and, for each identified segment, identifying a rendering profile from a set of rendering profiles. The rendering profile may include a look up table for converting pixels from a first color space, such as a device independent color space, e.g., RGB, to second color space, such as a device dependent color space, e.g., CMYK. The identified rendering profile is applied to the respective segment and the segments to which the profiles have been applied are combined into a print job for rendering on print media by an associated color output device or otherwise output. The system allows different segments in the image to be processed through different rendering profiles most suited to the objects that the segments contain.

摘要翻译： 用于渲染图像的系统和方法提供了基于图像内容将图像分割成多个片段，并且对于每个识别的片段，从一组渲染轮廓识别渲染轮廓。 呈现轮廓可以包括用于将来自第一颜色空间（例如，与设备无关的颜色空间，例如RGB）的像素转换为第二颜色空间（例如，依赖于设备的色彩空间，例如CMYK）的查找表。 所识别的呈现轮廓被应用于相应的段，并且将已经应用轮廓的段组合成打印作业，以通过相关联的颜色输出装置在打印介质上进行渲染或以其他方式输出。 该系统允许通过不同的渲染轮廓来处理图像中的不同片段，这些轮廓最适合片段包含的对象。

公开(公告)号：US08928901B2

公开(公告)日：2015-01-06

申请号：US13351630

申请日：2012-01-17

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： H04N1/60

CPC分类号： H04N1/52 ,  H04N1/603

摘要： What is disclosed is a method for profile LUT construction which uses a cost function to provide improvements to one or more image quality attributes present in printed images while imposing constraints in terms of color accuracy and spectral response to achieve a color match under various illuminants. Image quality attributes are selected. A reference profile is selected. For each node, candidate recipes are found which reproduce L*a*b* colors within a threshold em. Recipes are pruned to a subset containing recipes where a spectral difference between a predicted spectra corresponding to N color levels and a reference reflectance spectra corresponding to a spectra of a recipe produced by the reference profile, is less than a threshold. A cost function is computed and a recipe identified which minimizes the cost for this node. The process repeats for all nodes to produce a new profile LUT.

摘要翻译： 所公开的是用于轮廓LUT构造的方法，其使用成本函数来提供对印刷图像中存在的一个或多个图像质量属性的改进，同时在颜色精度和光谱响应方面施加约束以实现各种光源下的颜色匹配。 选择图像质量属性。 选择参考资料。 对于每个节点，找到在阈值em内再现L * a * b *颜色的候选配方。 将食谱修剪成包含配方的子集，其中对应于N个颜色级别的预测光谱与对应于由参考分布图产生的食谱的参考反射光谱之间的光谱差小于阈值。 计算成本函数，并确定最小化此节点成本的配方。 该过程重复所有节点以产生新的配置文件LUT。

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：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。