公开(公告)号：US07880930B2

公开(公告)日：2011-02-01

申请号：US12122762

申请日：2008-05-19

申请人： Yeqing Zhang ,  Howard A. Mizes ,  Meng Yao ,  Susan J. Zoltner

发明人： Yeqing Zhang ,  Howard A. Mizes ,  Meng Yao ,  Susan J. Zoltner

IPC分类号： H04N1/60 ,  H04N1/46 ,  G03F3/08 ,  G06K9/00 ,  G06K9/40

CPC分类号： H04N1/58

摘要： What is disclosed is a novel system and method for reducing process color banding due to printhead non-uniformities in a direct marking device. In one example, a first measurement of a printhead spatial non-uniformity is obtained along a first line in a color space which produces a spatial uniformity when a target primary color is printed alone. A first spatial tone reproduction curve is generated. A second measurement of the printhead spatial non-uniformity is obtained along a second line in color space in a coverage area of a process color which maximally changes a halftone structure of the target primary color. A second spatial TRC is generated. The first and second spatial TRCs are combined using a weighted average which balances the primary and process colors. A modified spatial TRC is generated. The printhead is adjusted at a location of the target primary color according to the modified spatial TRC.

摘要翻译： 公开的是一种用于在直接标记装置中由于打印头不均匀性而减少处理颜色带的新型系统和方法。 在一个示例中，当单独打印目标原色时，沿着产生空间均匀性的颜色空间中的第一行获得打印头空间不均匀性的第一测量。 产生第一空间色调再现曲线。 在最大程度上改变目标原色的半色调结构的处理颜色的覆盖区域中，沿色彩空间中的第二行获得打印头空间不均匀性的第二测量。 产生第二空间TRC。 第一和第二空间TRC使用平衡主要和过程颜色的加权平均数进行组合。 生成修改后的空间TRC。 根据改进的空间TRC，将打印头调整到目标原色的位置。

公开(公告)号：US20100232652A1

公开(公告)日：2010-09-16

申请号：US12402557

申请日：2009-03-12

申请人： Andrew S. Yeh ,  Bhaskar T. Ramakrishnan ,  Kelly D. Sims ,  Katie Maria Teslow ,  Luo Cheng ,  George Laurens Taylor ,  John Alan Durbin ,  Ernest I. Esplin ,  Howard A. Mizes ,  Joel Chan ,  Ngoc-Diep Thi Nguyen ,  Susan J. Zoltner ,  Yeqing Zhang ,  Lisa Schmidt ,  Kenneth R. Chamberlain ,  Matthew Hudson Dixon ,  Steven Van Cleve Korol ,  James B. Campbell ,  Russell J. Watt

发明人： Andrew S. Yeh ,  Bhaskar T. Ramakrishnan ,  Kelly D. Sims ,  Katie Maria Teslow ,  Luo Cheng ,  George Laurens Taylor ,  John Alan Durbin ,  Ernest I. Esplin ,  Howard A. Mizes ,  Joel Chan ,  Ngoc-Diep Thi Nguyen ,  Susan J. Zoltner ,  Yeqing Zhang ,  Lisa Schmidt ,  Kenneth R. Chamberlain ,  Matthew Hudson Dixon ,  Steven Van Cleve Korol ,  James B. Campbell ,  Russell J. Watt

IPC分类号： G06K9/00

CPC分类号： H04N1/00015 ,  H04N1/00023 ,  H04N1/00031 ,  H04N1/00045 ,  H04N1/00053 ,  H04N1/00063 ,  H04N1/00068 ,  H04N1/00087 ,  H04N1/0009 ,  H04N1/2346 ,  H04N1/40025 ,  H04N1/4015

摘要： A method evaluates image quality in an ink printing system and generates data values for altering the operation of the ink printing system. The method includes generating an ink image on an ink image receiving member that corresponds to a digital image stored in the ink printing system, generating a scanned image signal corresponding to the ink image, generating firing signal waveform adjustments and image data adjustments with reference to the scanned image signal corresponding to the ink image, and operating a printhead in an ink imaging system with reference to the firing signal waveform adjustments and the image data adjustments.

摘要翻译： 一种方法评估油墨打印系统中的图像质量，并产生用于改变油墨打印系统的操作的数据值。 该方法包括在油墨图像接收部件上产生与存储在油墨打印系统中的数字图像相对应的油墨图像，产生与油墨图像相对应的扫描图像信号，产生点火信号波形调整和图像数据调节 扫描图像信号，并且参照点火信号波形调节和图像数据调整来操作墨水成像系统中的打印头。

公开(公告)号：US06683702B1

公开(公告)日：2004-01-27

申请号：US09348398

申请日：1999-07-07

申请人： Robert P. Loce ,  Michael Branciforte ,  Yeqing Zhang ,  Leon C. Williams

发明人： Robert P. Loce ,  Michael Branciforte ,  Yeqing Zhang ,  Leon C. Williams

IPC分类号： G06K936

CPC分类号： H04N1/40075 ,  H04N1/4056

摘要： A method of reproducing a document including halftoned regions therein scans the document to generate scanned image data comprising a digitized representation of said document. The scanned image data that corresponds to the halftoned regions is then rendered using a compact rendering process that includes positioning an observation window about a target pixel and a neighboring pixel; selecting a fill-order based upon a result of the analyzing step; and generating a high addressability pixel as a function of the selected fill-order.

摘要翻译： 再现包括其中的半色调区域的文档的方法扫描文档以生成包括所述文档的数字化表示的扫描图像数据。 然后使用包括定位关于目标像素和相邻像素的观察窗的紧凑渲染过程来渲染与半色调区域对应的扫描图像数据; 基于分析步骤的结果选择填充顺序; 以及根据所选择的填充顺序生成高可寻址性像素。

公开(公告)号：US06449396B1

公开(公告)日：2002-09-10

申请号：US09348871

申请日：1999-07-07

申请人： Robert P. Loce ,  Yeqing Zhang ,  Leon C. Williams ,  Michael Branciforte

发明人： Robert P. Loce ,  Yeqing Zhang ,  Leon C. Williams ,  Michael Branciforte

IPC分类号： G06K936

CPC分类号： H04N1/4056 ,  H04N1/40075

摘要： A method of processing a high addressability binary image comprises converting the high addressability binary image to gray-scale image data; manipulating the gray-scale image data; and rendering the manipulated gray-scale image to a high addressability format using a compact rendering process.

摘要翻译： 一种处理高可寻址性二值图像的方法包括将高可寻址性二进制图像转换为灰度图像数据; 操纵灰度图像数据; 并使用紧凑的渲染过程将操纵的灰度图像呈现为高寻址能力格式。

公开(公告)号：US06249592B1

公开(公告)日：2001-06-19

申请号：US09083171

申请日：1998-05-22

申请人： Zhigang Fan ,  Yeqing Zhang ,  Martin E. Banton

发明人： Zhigang Fan ,  Yeqing Zhang ,  Martin E. Banton

IPC分类号： G06K900

CPC分类号： H04N1/56

摘要： A method of neutral color detection for use in color copiers and scanners is provided. The method includes reading (10) an input page. The contents of the page are detected (12) and it is determined (14) if the page is neutral in color. If the page is not neutral in color (20), the page is then divided into a number of regions (30). Each region is then detected (40), and a determination (42) is made if individual regions are neutral in color. Next, details located outside regions determined to be neutral in color are detected (70) and it is determined (72) if the details are neutral in color. This multi-resolution technique permits the full page, an individual region, and/or particular details to be processed without the constraints, limitations, and reproduction demands associated with their color counterparts.

摘要翻译： 提供了一种用于彩色复印机和扫描仪的中性色彩检测方法。 该方法包括读取（10）输入页面。 检测页面的内容（12），确定（14）页面是否为中性色。 如果页面不是中性色（20），则页面被分成多个区域（30）。 然后检测每个区域（40），并且如果各个区域的颜色是中性的，则确定（42）。 接下来，检测被确定为中性色彩的区域外的细节（70），并且确定（72）细节是否为中性色。 这种多分辨率技术允许在没有与其颜色对应物相关联的约束，限制和再现要求的情况下处理全页，单个区域和/或特定细节。

公开(公告)号：US20130038657A1

公开(公告)日：2013-02-14

申请号：US13208272

申请日：2011-08-11

申请人： R. Enrique Viturro ,  Yeqing Zhang ,  Patricia J. Donaldson

发明人： R. Enrique Viturro ,  Yeqing Zhang ,  Patricia J. Donaldson

IPC分类号： B41J29/393

CPC分类号： B41J29/393 ,  B41J2/04508 ,  B41J2/04581 ,  B41J2/04588 ,  B41J2/0459 ,  B41J2029/3935 ,  B41J2202/21

摘要： A method for calibrating in situ a plurality of printheads in an imaging device has been developed. Firing signals operate a plurality of printheads to form ink test patterns on an image receiving member. Reflectance measurements of light reflected from the test patterns and optical density measurements for a portion of the patterns formed by only one printhead in the plurality of printheads are used to adjust the firing signals and enable the printheads to print within a predetermined range about an average reflectance value and a predetermined optical density.

公开(公告)号：US07864364B2

公开(公告)日：2011-01-04

申请号：US11199692

申请日：2005-08-09

申请人： Yeqing Zhang ,  Robert P. Loce ,  Raja Bala

发明人： Yeqing Zhang ,  Robert P. Loce ,  Raja Bala

IPC分类号： G03F3/08 ,  G06F15/00

CPC分类号： H04N1/6027

摘要： A color transformation method which accounts for colorant interactions includes establishing a plurality of tone reproduction curves (TRCs), for one or more of the color separations forming a digital image. Each TRC accounts for colorant interactions between a primary colorant with which the first color separation is to be rendered and at least one secondary colorant with which at least a second of the plurality of color separations is to be rendered. The TRCs include input values and their corresponding modified input values. In a given TRC, the input values of the second and optionally other color separations are fixed. For a pixel of the digital image having a given input values for the first and second color separation one or more of the TRCs are selected which bound the fixed input value for the second color separation and a modified input value is determined therefrom.

摘要翻译： 考虑着色剂相互作用的颜色变换方法包括为形成数字图像的一个或多个分色建立多个色调再现曲线（TRC）。 每个TRC考虑到将要渲染第一颜色分离的主要着色剂与至少一种次要着色剂之间的着色剂相互作用，至少一个次要着色剂将使多个分色中的至少一个分色进行渲染。 TRC包括输入值及其对应的修改输入值。 在给定的TRC中，第二个和任选的其他分色的输入值是固定的。 对于具有用于第一和第二颜色分离的给定输入值的数字图像的像素，选择一个或多个TRC，其限定用于第二颜色分离的固定输入值，并且从其确定修改的输入值。

公开(公告)号：US07590282B2

公开(公告)日：2009-09-15

申请号：US11314670

申请日：2005-12-21

申请人： Zhigang Fan ,  Lalit Keshav Mestha ,  Yao Rong Wang ,  Robert P. Loce ,  Yeqing Zhang

发明人： Zhigang Fan ,  Lalit Keshav Mestha ,  Yao Rong Wang ,  Robert P. Loce ,  Yeqing Zhang

IPC分类号： G06K9/00

CPC分类号： H04N1/4015

摘要： A method and system for selecting an optimal set of S number of calibration patches for an image producing system. The method of selecting the S number of calibration patches includes acquiring a set of K number of basis eigen vectors and model parameters which represent the image producing system having G number of colors and computing the optimal set of S number of colors selected from the set of G number of colors. Each one of the computed set of S number of colors is used for one of the S number of calibration patches.

摘要翻译： 一种用于为图像产生系统选择S个校准块的最佳集合的方法和系统。 选择S个校准贴片的方法包括获取K个基本特征向量和模型参数的集合，所述基本特征向量和模型参数表示具有G个颜色的图像生成系统，并且计算从该组中选择的S个颜色的最佳集合 G色数。 所计算的S个颜色的组合中的每一个用于S个校准块中的一个。

公开(公告)号：US07525704B2

公开(公告)日：2009-04-28

申请号：US11311950

申请日：2005-12-20

申请人： Robert P. Loce ,  Yeqing Zhang ,  Gaurav Sharma ,  Steven J. Harrington ,  Peter A. Crean

发明人： Robert P. Loce ,  Yeqing Zhang ,  Gaurav Sharma ,  Steven J. Harrington ,  Peter A. Crean

IPC分类号： H04N1/46 ,  H04N13/04

CPC分类号： H04N13/302

摘要： A system for enabling depth perception of image content in a rendered composite image, wherein illuminant/colorant depth discrimination encoding provides encoding of first and second source images in a composite image, for the purposes of subsequent illuminant/colorant depth discrimination decoding. Composite image rendering allows for rendering the composite image in a physical form. Illuminant/colorant depth discrimination decoding allows recovery of the first and second source images, thus offering to an observer the perception of spatial disparity between at least one of the recovered source images and some or all of the remaining image content perceived in the rendered composite image.

摘要翻译： 一种用于在渲染的合成图像中实现图像内容的深度感知的系统，其中光源/着色剂深度识别编码提供合成图像中的第一和第二源图像的编码，以用于随后的发光/着色剂深度鉴别解码。 复合图像渲染允许以物理形式呈现合成图像。 照明/着色深度鉴别解码允许恢复第一和第二源图像，从而向观察者提供至少一个恢复的源图像与所渲染的合成图像中感知的剩余图像内容中的一些或全部之间的空间差异的感知 。

公开(公告)号：US20090040261A1

公开(公告)日：2009-02-12

申请号：US11890879

申请日：2007-08-08

申请人： Yeqing Zhang ,  Howard A. Mizes ,  Luo Cheng

发明人： Yeqing Zhang ,  Howard A. Mizes ,  Luo Cheng

IPC分类号： B41J29/393 ,  H01J40/14

CPC分类号： B41J29/393

摘要： A system removes a light sensor artifact from a light sensor in a printer that is used to obtain reflectance measurements from test patterns printed on an image substrate. The system includes a print head for ejecting a plurality of pixels having a first single color in a test pattern onto an image substrate, a light source for illuminating the test pattern on the image substrate with a light, a light sensor for measuring reflectance of the first portion of the test pattern with reference to a light having a color that is non-complementary to the first single color of the test pattern, measuring reflectance of the first portion of the test pattern with reference to a light that is complementary to the first single color of the test pattern, and measuring reflectance of the second portion of the test pattern with reference to the complementary light, the second portion including an area that overlaps the first portion of the test pattern, and a sensor controller configured to scale the reflectance of the first portion measured with reference to the non-complementary light to minimize a difference between the reflectance of the first portion measured with reference to the complementary light and the reflectance of the second portion measured with reference to the complementary light in the overlapped area.

摘要翻译： 系统从用于从印刷在图像基板上的测试图形获得反射率测量值的打印机中的光传感器去除光传感器伪影。 该系统包括用于将测试图案中的具有第一单色的多个像素喷射到图像基板上的打印头，用于用光照射图像基板上的测试图案的光源，用于测量该图像的反射率的光传感器 参考具有与测试图案的第一单色互补的颜色的光的测试图案的第一部分，参考与第一图像互补的光来测量测试图案的第一部分的反射率 测试图案的单色，并且参考互补光测量测试图案的第二部分的反射率，第二部分包括与测试图案的第一部分重叠的区域，以及被配置为缩放反射率的传感器控制器 相对于非互补光测量的第一部分，以最小化由第一部分测量的第一部分的反射率之间的差异 参考互补光和参照重叠区域中的互补光测量的第二部分的反射率。