公开(公告)号：US07486416B2

公开(公告)日：2009-02-03

申请号：US11143818

申请日：2005-06-02

申请人： Edul N. Dalal ,  Wencheng Wu ,  Robert P. Loce ,  Raja Bala ,  Yeqing Zhang ,  Norman W. Zeck

发明人： Edul N. Dalal ,  Wencheng Wu ,  Robert P. Loce ,  Raja Bala ,  Yeqing Zhang ,  Norman W. Zeck

IPC分类号： H04N1/60 ,  H04N1/04 ,  G03F3/08 ,  G06K15/00 ,  G06K9/00

CPC分类号： H04N1/6038 ,  H04N1/6041

摘要： Spatially dependent colorant interaction effects are identified and isolated from other aspects of spatially dependent colorant appearance nonuniformities. A decorrelating function for compensating for the identified spatially dependent colorant interaction effects is determined. Spatially dependent single colorant compensating functions for compensating for the other aspects of the spatially dependent colorant appearance nonuniformities may also be determined. Image data is processed through the decorrelating function, thereby generating colorant values that are compensated for spatially dependent colorant interaction effects. Optionally, image data is also processed through the spatially dependent single colorant compensating functions, thereby generating colorant values that are compensated for both aspects of colorant appearance nonuniformities. The two kinds of compensating functions may be determined, calibrated and/or stored at different spatial and temporal frequencies or resolutions. One or both of the compensating functions may be employed to maintain consistency across a plurality of rendering devices (e.g., marking engines).

摘要翻译： 从空间依赖的着色剂外观不均匀性的其他方面鉴定和分离空间依赖性着色剂相互作用效应。 确定用于补偿所识别的空间依赖着色剂相互作用效应的去相关函数。 还可以确定用于补偿空间依赖着色剂外观不均匀性的其它方面的空间依赖性单色剂补偿功能。 图像数据通过去相关功能进行处理，从而产生对空间依赖的着色剂相互作用效应进行补偿的着色剂值。 可选地，还通过空间依赖的单一着色剂补偿功能来处理图像数据，由此产生着色剂值，其对着色剂外观不均匀性的两个方面进行补偿。 可以在不同的空间和时间频率或分辨率下确定，校准和/或存储两种补偿功能。 可以采用一种或两种补偿功能来保持多个渲染设备（例如，标记引擎）之间的一致性。

公开(公告)号：US20140071281A1

公开(公告)日：2014-03-13

申请号：US13610907

申请日：2012-09-12

申请人： Wencheng Wu ,  Edul N. Dalal

发明人： Wencheng Wu ,  Edul N. Dalal

IPC分类号： H04N17/00

CPC分类号： H04N17/002 ,  G08G1/04

摘要： A method for determining a response to misalignment of a camera monitoring a desired area includes acquiring temporal related frames from the camera including a reference frame. A pixel location is determined of a reference object from the frames. Using the pixel location of the reference object, a displacement of the camera between a current frame and the reference frame is determined. For the displacement exceeding a first threshold, a new displacement of the camera is measured by introducing at least one additional object to a camera field of view and comparing the new displacement to a second threshold. For the new displacement not exceeding the second threshold, the camera is recalibrated using a determined pixel location and a physical location of the at least one additional object. For the new displacement exceeding the second threshold, notification is provided of a misalignment to an associated user device.

摘要翻译： 用于确定对监视所需区域的相机的未对准的响应的方法包括从摄像机获取包括参考帧的时间相关帧。 从帧中确定参考对象的像素位置。 使用参考对象的像素位置，确定相机在当前帧与参考帧之间的位移。 对于超过第一阈值的位移，通过将至少一个附加对象引入照相机视野并将新位移与第二阈值进行比较来测量照相机的新位移。 对于不超过第二阈值的新位移，使用确定的像素位置和至少一个附加对象的物理位置来重新校准照相机。 对于超过第二阈值的新位移，向相关联的用户设备通知未对准。

公开(公告)号：US08670153B2

公开(公告)日：2014-03-11

申请号：US12942414

申请日：2010-11-09

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： H04N1/60 ,  G06K9/00

CPC分类号： H04N1/6058

摘要： What is disclosed is a novel system and method for mapping out-of-gamut colors to a device's gamut to improve image quality in a color document reproduction device involves performing the following. First, an out-of-gamut color xi, which is intended to be mapped to a boundary surface of a color gamut of a color marking device, is selected. A gamut mapping function is also selected. The selected gamut mapping function is intended to be applied to the selected out-of-gamut color point. At least one performance attribute is then selected for the color marking device and a multi-objective cumulative cost JT is determined based upon a combination of costs Jgm and Js. The multi-objective cumulative cost JT is then iteratively driven to a minimum. Once the minimum has been determined, a gamut mapping of the selected out-of-gamut color can then be performed using the minimized multi-objective cumulative cost. Various embodiments are disclosed.

摘要翻译： 公开的是用于将色域外的色彩映射到设备的色域以改善彩色文档再现设备中的图像质量的新颖系统和方法，包括执行以下操作。 首先，选择旨在映射到彩色标记装置的色域的边界表面的色域外的色彩xi。 还选择色域映射功能。 所选择的色域映射功能旨在应用于所选择的色域外色点。 然后为颜色标记装置选择至少一个性能属性，并且基于成本Jgm和Js的组合来确定多目标累积成本JT。 然后将多目标累积成本JT迭代地驱动到最小。 一旦确定了最小值，则可以使用最小化的多目标累积成本来执行所选出的色域外颜色的色域映射。 公开了各种实施例。

公开(公告)号：US08571268B2

公开(公告)日：2013-10-29

申请号：US12727724

申请日：2010-03-19

申请人： Wencheng Wu ,  Edul N. Dalal

发明人： Wencheng Wu ,  Edul N. Dalal

IPC分类号： G06K9/00

CPC分类号： G06T7/0006 ,  G06T2207/10024 ,  G06T2207/30144

摘要： What is disclosed is a novel system and method for determining printer performance in terms of image quality (IQ) on-paper using on-belt measurements. First, image noise is measured via sensing of single-separation device-dependent colors on an imaging member for a target marking device. Such single-separation device-dependent colors, in one embodiment, comprise cyan, magenta, yellow and black. A predictive correlation model is used to project the image noise of the single-separation device-dependent colors when printed on a substrate. A noise prediction model is used to estimate image noise performance values of multi-separation device-dependent colors on a substrate from the projected single-separation device-dependent colors on a substrate. In one embodiment, the predictive correlation model comprises a separation-dependent polynomial equation. The estimated image noise performance values on a substrate are used to determine image quality metric of the target marking device.

摘要翻译： 所公开的是使用带上测量在纸上使用图像质量（IQ）来确定打印机性能的新型系统和方法。 首先，通过感测目标标记装置的成像构件上的单分离装置相关颜色来测量图像噪声。 在一个实施例中，这种单分离装置相关的颜色包括青色，品红色，黄色和黑色。 使用预测相关模型来投影印刷在基板上的单分离装置相关颜色的图像噪声。 噪声预测模型用于从基底上投影的单分离装置依赖颜色估计基板上多分离装置相关颜色的图像噪声性能值。 在一个实施例中，预测相关模型包括分离依赖多项式方程。 使用基板上的估计图像噪声性能值来确定目标标记装置的图像质量度量。

公开(公告)号：US08531734B2

公开(公告)日：2013-09-10

申请号：US13023202

申请日：2011-02-08

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

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

IPC分类号： G06T5/00

CPC分类号： H04N1/6033

摘要： 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.

摘要翻译： 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：US08493621B2

公开(公告)日：2013-07-23

申请号：US12462527

申请日：2009-08-05

申请人： Wencheng Wu ,  Edul N. Dalal

发明人： Wencheng Wu ,  Edul N. Dalal

IPC分类号： H04N1/40

CPC分类号： H04N1/6033

摘要： A method for optimally using color patch codes or color barcodes for transmitting machine-readable information, via device characterization, is disclosed to comprise characterizing a printing device and optionally a sensing device for identifying a number of recognizably spaced printer output colors; deriving a code book, by relating the printer output colors and their corresponding input values to information elements; and using the code book for encoding and decoding the information to be transmitted. The recognizably spaced printer output colors are in terms of a color space relevant to a color patch code or color barcode sensing device, and are related to the corresponding marking device input values.

摘要翻译： 公开了一种用于通过设备表征来最佳地使用色块代码或颜色条形码来发送机器可读信息的方法，其包括表征打印装置和可选地用于识别多个可识别间隔的打印机输出颜色的感测装置; 通过将打印机输出颜色及其相应的输入值与信息元素相关联来导出代码簿; 并使用码本对要发送的信息进行编码和解码。 可识别间隔的打印机输出颜色是与色块代码或颜色条形码检测装置相关的颜色空间，并且与相应的标记装置输入值有关。

公开(公告)号：US08477372B2

公开(公告)日：2013-07-02

申请号：US12781988

申请日：2010-05-18

申请人： Wencheng Wu ,  Edul N. Dalal

发明人： Wencheng Wu ,  Edul N. Dalal

IPC分类号： H04N1/60

CPC分类号： H04N1/603 ,  H04N1/40006

摘要： What is disclosed is a novel system and method for determining a printer metric in terms of image quality (IQ) over a large complex set of conditions based upon measurements taken over a small simple set of conditions while compensating for printer drift. The present system and method effectively utilizes a predictive model that predicts noise measurements of multi-separations from those of single-separation colors and/or a subset of the multi-separations. Because a model is used to comprehend the metric over the entire gamut, the number of patches is reduced. This reduction enables the method to be used within a machine to dynamically characterize the device's image quality metric. Various embodiments have been disclosed.

摘要翻译： 所公开的是一种新颖的系统和方法，用于在补偿打印机漂移的基础上，基于在一小组简单的条件下进行的测量，在大的复杂条件集上根据图像质量（IQ）来确定打印机度量。 本系统和方法有效地利用预测多分离与单分离颜色和/或多分离子集的噪声测量的预测模型。 由于使用模型来了解整个色域中的度量，因此减少了补丁的数量。 这种减少使得可以在机器内使用该方法来动态地表征设备的图像质量度量。 已经公开了各种实施例。

公开(公告)号：US20120300230A1

公开(公告)日：2012-11-29

申请号：US13116233

申请日：2011-05-26

申请人： Edul N. Dalal ,  Wencheng Wu

发明人： Edul N. Dalal ,  Wencheng Wu

IPC分类号： G06K15/00

CPC分类号： B41J29/393 ,  H04N1/00015 ,  H04N1/00023 ,  H04N1/00031 ,  H04N1/00045 ,  H04N1/00063 ,  H04N1/00068 ,  H04N1/00087 ,  H04N1/0009 ,  H04N1/6033 ,  H04N2201/0094 ,  H04N2201/326

摘要： Methods and systems are disclosed which are capable of efficiently performing color management of a variable gloss color printing system. The methods and systems select at least one set of the linear color values corresponding to the color profile for the printing device (at the nominal gloss condition). The linear color values selected comprise those obtained from color values corresponding to each node of the color profile at the nominal gloss condition. In a colorimetric embodiment, the linear color values can comprise: tristimulus values XYZ; red, green, blue (RGB); or luminance component Y, and two chromatic components C1 and C2 (YCC). In a reflectance embodiment, the linear color values comprise reflectance spectra. This exemplary method adds an offset term to each of the linear color values to produce a corresponding set of modified linear color values, and generates a color profile for the printing device at the desired gloss condition based on the modified linear color values.

摘要翻译： 公开了能够有效执行可变光泽彩色打印系统的颜色管理的方法和系统。 方法和系统选择与印刷装置的颜色特征对应的至少一组线性颜色值（在标称光泽条件下）。 所选择的线性颜色值包括从在标称光泽条件下的颜色轮廓的每个节点对应的颜色值获得的。 在比色实施例中，线性颜色值可以包括：三刺激值XYZ; 红，绿，蓝（RGB）; 或亮度分量Y，以及两个彩色分量C1和C2（YCC）。 在反射率实施例中，线性颜色值包括反射光谱。 该示例性方法将偏移项添加到每个线性颜色值以产生相应的一组修改的线性颜色值，并且基于修改的线性颜色值在期望的光泽条件下为打印装置生成颜色特征。

公开(公告)号：US20120200897A1

公开(公告)日：2012-08-09

申请号：US13023202

申请日：2011-02-08

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

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

IPC分类号： G06T5/00

CPC分类号： H04N1/6033

摘要： 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.

摘要翻译： 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：US20120154831A1

公开(公告)日：2012-06-21

申请号：US12969854

申请日：2010-12-16

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

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

IPC分类号： H04N1/60

CPC分类号： H04N1/6033

摘要： What is disclosed is a novel system and method for updating a cluster model for color control. In one example embodiment, a cluster model is received and analyzed to identify clusters therein. Each of the identified clusters has an associated transform. Thereafter, in response to a threshold event having occurred, a critical cluster is identified and a critical color is identified from the cluster. Steps for identifying a critical color are more fully described herein. A selected number of patches is then printed in each of the critical colors and color measurements are obtained from the printed patches using, for instance, a colorimeter or spectrophotometer. If the color measurements have deviated beyond a defined threshold, then update the cluster model by: updating the transform associated with the cluster; redefining the number of clusters; redefining a center of any of the clusters; or redefining a boundary of the clusters.

摘要翻译： 公开的是用于更新用于颜色控制的聚类模型的新型系统和方法。 在一个示例实施例中，接收并分析集群模型以识别其中的集群。 所识别的每个群集都具有相关联的变换。 此后，响应于发生的阈值事件，识别关键簇并且从集群识别关键颜色。 用于识别关键颜色的步骤在本文中更全面地描述。 然后以每种关键颜色印刷所选数量的贴片，并且使用例如色度计或分光光度计从印刷的贴片获得颜色测量值。 如果颜色测量值偏离了定义的阈值，则通过更新与集群关联的变换来更新集群模型; 重新定义集群数; 重新定义任何集群的中心; 或重新定义集群的边界。