公开(公告)号：US20110090548A1

公开(公告)日：2011-04-21

申请号：US12581566

申请日：2009-10-19

申请人： LALIT KESHAV MESTHA ,  Alvaro Enrique Gil ,  Peter Aidan Crean

发明人： LALIT KESHAV MESTHA ,  Alvaro Enrique Gil ,  Peter Aidan Crean

IPC分类号： G03F3/08

CPC分类号： H04N1/6022 ,  H04N1/6052

摘要： What is disclosed is a novel system and method to reduce noise induced by color mixing in a color management system. At least one device color recipe is obtained for a target spot color. The recipe is defined for a color marking device and defines a range of marking device color values for a target L*a*b color value. Next, a minimal value and a maximum value of each color value in the range of color values for said target L*a*b color value are identified. An iterative process of searching is performed until the printed color test patch produces a visually acceptable smoothness while matching color accuracy. This iterative process includes generating at least one additional new device color recipe from color values within the range of color values. At least one of the new device color recipes is selected and provided to the color marking device for rendering.

摘要翻译： 公开了一种减少颜色管理系统中颜色混合引起的噪声的新型系统和方法。 为目标专色获得至少一个设备颜色配方。 为彩色标记设备定义配方，并定义了目标L * a * b颜色值的标记设备颜色值的范围。 接下来，识别所述目标L * a * b颜色值的颜色值的范围内的每个颜色值的最小值和最大值。 执行搜索的迭代过程，直到打印的色彩测试贴片在匹配颜色精度的同时产生视觉上可接受的平滑度。 该迭代过程包括从颜色值范围内的颜色值生成至少一个附加的新设备颜色配方。 选择至少一种新的设备颜色配方并将其提供给彩色标记设备进行渲染。

公开(公告)号：US20100215258A1

公开(公告)日：2010-08-26

申请号：US12391529

申请日：2009-02-24

申请人： LALIT KESHAV MESTHA ,  Alvaro Enrique Gil

发明人： LALIT KESHAV MESTHA ,  Alvaro Enrique Gil

IPC分类号： G06K9/00

CPC分类号： H04N1/6058

摘要： What is disclosed is a novel system and method for quickly and accurately determining whether a color is inside or outside the boundary of a surface of a color gamut. The present method enables a gamut mapping algorithm to quickly identify points which require further processing and those which are already inside the gamut and thus do not need to be processed by the gamut mapping function. The present method can be performed directly on the printing device to determine whether the colors are in/out of the actual gamut surface of the target marking device. Other embodiments have also been disclosed.

摘要翻译： 公开的是用于快速且准确地确定颜色是否在色域的表面的边界内部或外部的新颖的系统和方法。 本方法使得色域映射算法能够快速识别需要进一步处理的点和已经在色域内的点，因此不需要由色域映射函数来处理。 本方法可以直接在打印装置上执行，以确定颜色是否在目标标记装置的实际色域表面之中。 还公开了其它实施例。

公开(公告)号：US20100214579A1

公开(公告)日：2010-08-26

申请号：US12391504

申请日：2009-02-24

申请人： LALIT KESHAV MESTHA ,  Alvaro Enrique Gil

发明人： LALIT KESHAV MESTHA ,  Alvaro Enrique Gil

IPC分类号： H04N1/60

CPC分类号： H04N1/6058

摘要： What is disclosed is a system and method for mapping an out-of-gamut spot color to a surface boundary of a target color gamut of a color marking device in a color management system. The present method accurately detects the intersection of a point at the boundary surface of a ray traced between the out-of-gamut color and color point along a neutral axis of the target gamut. The ability to map an out-of-gamut color accurately to the gamut surface provides many advantages as one skilled in the art would appreciate. Various embodiments are provided.

摘要翻译： 所公开的是用于将色域外的专色映射到颜色管理系统中的颜色标记装置的目标色域的表面边界的系统和方法。 本方法精确地检测在目标色域的中性轴之间的在色域外的色域和色点之间记录的光线的边界点处的交点。 将色域外的色彩映射到色域表面的能力提供了许多优点，如本领域技术人员将理解的。 提供了各种实施例。

公开(公告)号：US20110149311A1

公开(公告)日：2011-06-23

申请号：US12645832

申请日：2009-12-23

申请人： LALIT KESHAV MESTHA ,  Yonghui Zhao ,  Yao Rong Wang

发明人： LALIT KESHAV MESTHA ,  Yonghui Zhao ,  Yao Rong Wang

IPC分类号： G06F15/00

CPC分类号： H04N1/62 ,  H04N1/6033

摘要： What is disclosed is a novel system and method for generating a color inconstancy guide for use in spot color print applications. In a manner more fully disclosed herein, color inconstancy values are calculated for selected spot colors of interest using a color inconstancy metric. A color inconstancy guide is generated from the calculated color inconstancy values and their respective spot colors. Thereafter, when a user desires to render a job in a particular spot color, the associated color inconstancy value for that color can be obtained from the guide. In various embodiments, recommendations in the form of a suggested printer to use, a media type, a halftone screen, and other meaningful assistance can be provided for spot color selection that are less sensitive to varying illuminations for a given print/copy job. The present color inconstancy guide provides meaningful extensions in color quality and color reproduction in print/copy job environments.

摘要翻译： 所公开的是用于产生用于专色印刷应用的颜色不定性指南的新型系统和方法。 以这里更全面地公开的方式，使用颜色不定标度来计算所选择的感兴趣的专色的颜色不定值。 从计算的颜色不定值及其各自的专色产生颜色不定性指南。 此后，当用户期望以特定专色呈现作品时，可以从该指南中获得该颜色的相关联的颜色不定值。 在各种实施例中，可以提供对于给定的打印/复印作业对变化的照明不敏感的专色选择的以使用的建议打印机，介质类型，半色调屏幕和其他有意义的帮助的形式的建议。 目前的色彩不一致指南在打印/复印作业环境中提供颜色质量和色彩再现的有意义的扩展。

公开(公告)号：US20100215262A1

公开(公告)日：2010-08-26

申请号：US12391473

申请日：2009-02-24

申请人： LALIT KESHAV MESTHA

发明人： LALIT KESHAV MESTHA

IPC分类号： G06K9/00 ,  H04N1/46

CPC分类号： H04N1/6058

摘要： What is disclosed is a novel system and method for performing ray-based compression mapping in a color management system. The present method compresses a color point located at or near a boundary surface of a color gamut to a point beneath the gamut surface in order to eliminate artifacts which are likely to arise from a color marking device trying to reproduce colors which are on a boundary of the device's printable gamut. The present method is directly applicable to a variety of gamut mapping strategies employed in color management systems.

摘要翻译： 公开的是用于在颜色管理系统中执行基于射线的压缩映射的新型系统和方法。 本方法将位于色域的边界表面处或附近的色点压缩到色域表面下方的点，以消除可能由尝试再现颜色边界上的颜色的颜色标记装置产生的伪像 该设备的可打印色域。 本方法直接适用于色彩管理系统中采用的各种色域映射策略。

公开(公告)号：US20090195797A1

公开(公告)日：2009-08-06

申请号：US12024221

申请日：2008-02-01

申请人： LALIT KESHAV MESTHA ,  Sohail A. Dianat

发明人： LALIT KESHAV MESTHA ,  Sohail A. Dianat

IPC分类号： G06F15/00

CPC分类号： G06F15/00 ,  H04N1/603 ,  H04N1/6036

摘要： What is provided are a novel system and method for determining a sensitivity matrix for adaptive color control in a color marking device capable of performing device independent color correction. In one embodiment, a determination is made as to what control operation the color marking device is being characterized for. Nominal CMYK values are then selected based on the determined control operation. If the control operation is a gray balancing operation, the nominal CMYK values are selected using C=M=Y=L* and K*=0 values. Otherwise, the nominal CMYK values are selected using a CMYK to L*a*b* printer map. Color parameters are determined for the CMYK values based on the selected nominal CMYK values. A sensitivity matrix is then generated from the color parameters and CMYK values. The method facilitates calibration of dynamically varying color reproduction devices.

摘要翻译： 提供了一种用于确定能够执行设备无关色彩校正的彩色标记装置中的自适应色彩控制的灵敏度矩阵的新型系统和方法。 在一个实施例中，确定颜色标记装置的特征在于什么控制操作。 然后根据确定的控制操作选择标称CMYK值。 如果控制操作是灰色平衡操作，则使用C = M = Y = L *和K * = 0值选择标称CMYK值。 否则，使用CMYK至L * a * b *打印机映射来选择标称CMYK值。 基于所选的标称CMYK值为CMYK值确定颜色参数。 然后从颜色参数和CMYK值生成灵敏度矩阵。 该方法便于校准动态变化的色彩再现设备。

公开(公告)号：US20110267630A1

公开(公告)日：2011-11-03

申请号：US12769811

申请日：2010-04-29

申请人： LALIT KESHAV MESTHA ,  Prudhvi Krishna Gurram

发明人： LALIT KESHAV MESTHA ,  Prudhvi Krishna Gurram

IPC分类号： H04N1/60

CPC分类号： H04N1/6058

摘要： What is disclosed is a novel system and method for retrieving a gamut mapping strategy from a seed profile of a seed device. In a manner more fully described herein, the present method provides an embodiment which accounts for the pathological case of a false gamut mapping ray being produced in those instances where the shapes of the gamuts of the host and seed devices are substantially different. In these instances, the rays miss the boundary surface of the host gamut and intersect the boundary of the L*a*b* cube. Another embodiment is provided which accounts for those cases wherein the ray intersects the host gamut at a substantially oblique angle such that mapped color is sufficiently different to generate contours in the output print.

摘要翻译： 公开的是用于从种子设备的种子简档中检索色域映射策略的新颖系统和方法。 以这里更全面地描述的方式，本方法提供了一个实施例，其解释了在主机和种子设备的色域的形状基本不同的情况下产生的假色域映射光线的病理情况。 在这些情况下，光线错过了主体色域的边界表面，并与L * a * b *立方体的边界相交。 提供了另一个实施例，其解释了这些情况，其中射线以基本倾斜的角度与主体色域相交，使得映射的颜色足够不同以在输出打印中产生轮廓。

公开(公告)号：US20110032545A1

公开(公告)日：2011-02-10

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： H04N1/60 ,  G03F3/08

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。