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：US08488181B2

公开(公告)日：2013-07-16

申请号：US12755666

申请日：2010-04-07

申请人： Wencheng Wu ,  Mu Qiao

发明人： Wencheng Wu ,  Mu Qiao

IPC分类号： G06K15/00

CPC分类号： G06K9/2063 ,  G06K9/00442 ,  G06K9/40 ,  G06K2209/01

摘要： What is disclosed is a novel system and method for identifying and removing print defects from an original document such that user markings applied to the hardcopy originally can be more readily identified and extracted. In one embodiment, an image of an original document and a marked document are received. The original document was printed using a print device which caused a print defect in the hardcopy print. Methods for identifying the print defect in the difference image are provided herein. The identified print defect is removed from the difference image. The difference image retains the user-applied markings once the print defects have been identified and removed. The user markings can then be provided to a storage device for subsequent retrieval and added into the image of the original document to generate an image of a new marked document containing the user markings without the defect. Various embodiments are disclosed.

摘要翻译： 公开的是用于从原始文档中识别和去除打印缺陷的新颖的系统和方法，使得最初可以更容易地识别和提取应用于硬拷贝的用户标记。 在一个实施例中，接收原始文档和标记文档的图像。 使用打印设备打印原始文档，这会导致硬拷贝打印中的打印缺陷。 本文提供了用于识别差分图像中的打印缺陷的方法。 识别的打印缺陷从差异图像中移除。 一旦识别和删除打印缺陷，差异图像保留用户应用的标记。 然后可以将用户标记提供给存储设备用于随后的检索，并将其添加到原始文档的图像中，以生成包含用户标记而没有缺陷的新标记文档的图像。 公开了各种实施例。

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：US08451504B2

公开(公告)日：2013-05-28

申请号：US12552519

申请日：2009-09-02

申请人： Beilei Xu ,  Wencheng Wu

发明人： Beilei Xu ,  Wencheng Wu

IPC分类号： H04N1/40

CPC分类号： G06K9/036

摘要： What is disclosed is a novel system and method for banding defect detection and analysis in digital imaging systems. The present method utilizes the gray levels of image regions and a collection of sequence of user images to improve the banding analysis. One embodiment hereof includes: segmenting images into regions; determining banding information for each page over a given sequence of images and detecting problem banding defect frequencies; estimating the banding amplitude(s) and average gray levels for each segmented region for each identified banding frequency(ies); and determining, through a process of interpolation, the banding amplitude for the image or sequence of images based on the banding amplitude and average gray levels of each region. Thereafter, notification can be provided to a key operator when the amplitude(s) are expected to exceed pre-determined levels over the course of a production run. The method demonstrates advantages in banding detection over whole-page methods.

摘要翻译： 公开的是用于在数字成像系统中条带缺陷检测和分析的新型系统和方法。 本方法利用图像区域的灰度级和用户图像序列的集合来改进条带分析。 其一个实施例包括：将图像分割成区域; 在给定的图像序列上确定每个页面的条带信息并检测问题带状缺陷频率; 为每个识别的条带频率估计每个分段区域的条带幅度和平均灰度级; 以及基于每个区域的条带幅度和平均灰度级，通过插值过程确定图像或图像序列的条带幅度。 此后，当在生产运行过程中预期振幅超过预定水平时，可向密钥操作者提供通知。 该方法显示了整页检索方法的优势。

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。