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    Systems and methods for compensating for streaks in images
    41.
    发明授权
    Systems and methods for compensating for streaks in images 有权
    用于补偿图像条纹的系统和方法

    公开(公告)号：US07758146B2

    公开(公告)日：2010-07-20

    申请号：US12023758

    申请日：2008-01-31

    申请人： Howard A. Mizes

    发明人： Howard A. Mizes

    IPC分类号： B41J29/393 ,  B41J2/47

    CPC分类号： H04N1/4015 ,  G06K15/02 ,  G06K15/027 ,  H04N1/4078

    摘要： Defects in an image forming system may give rise to visible streaks, or one-dimensional defects in an image that run parallel to the process direction. One known method for compensating for streaks introduces a separate tone reproduction curve for each pixel column in the process direction. A compensation pattern according to this invention has alignment marks before and after a halftone compensation region. The alignment marks provide alignment between the printer pixel grid and a scanning pixel grid. The line width of each alignment mark and the gray level in each pixel column of each gray level portion is measured and analyzed to produce a local tone reproduction curve for each pixel column and associated line width. The line widths of the alignment marks can be remeasured to adjust the local tone reproduction curves to compensate for the streak defect when printing.

    摘要翻译： 图像形成系统中的缺陷可能会导致可见的条纹或平行于过程方向延伸的图像中的一维缺陷。 用于补偿条纹的一种已知方法为处理方向上的每个像素列引入单独的色调再现曲线。 根据本发明的补偿图案在半色调补偿区域之前和之后具有对准标记。 对准标记提供打印机像素网格和扫描像素网格之间的对准。 测量和分析每个对准标记的线宽和每个灰度级部分的每个像素列中的灰度级，以产生每个像素列和相关线宽的局部色调再现曲线。 可以重新测量对准标记的线宽，以调整本地色调再现曲线，以补偿打印时的条纹缺陷。

    System and methods for compensating for streaks in images
    44.
    发明授权
    System and methods for compensating for streaks in images 有权
    用于补偿图像条纹的系统和方法

    公开(公告)号：US07090324B2

    公开(公告)日：2006-08-15

    申请号：US10739177

    申请日：2003-12-19

    申请人： Howard A. Mizes

    发明人： Howard A. Mizes

    IPC分类号： B41J29/393

    CPC分类号： H04N1/409 ,  B41J29/393 ,  H04N1/4015 ,  H04N2201/0471 ,  H04N2201/04717 ,  H04N2201/04732

    摘要： Defects in an image forming system may give rise to visible streaks, or one-dimensional defects in an image that run parallel to the process direction. One known method for compensating for streaks introduces a separate tone reproduction curve for each pixel column in the process direction. A compensation pattern according to this invention has alignment marks before and after a halftone compensation region. The alignment marks provide alignment between the printer pixel grid and a scanning pixel grid. The line width of each alignment mark and the gray level in each pixel column of each gray level portion is measured and analyzed to produce a local tone reproduction curve for each pixel column and associated line width. The line widths of the alignment marks can be remeasured to adjust the local tone reproduction curves to compensate for the streak defect when printing.

    摘要翻译： 图像形成系统中的缺陷可能会导致可见的条纹或平行于过程方向延伸的图像中的一维缺陷。 用于补偿条纹的一种已知方法为处理方向上的每个像素列引入单独的色调再现曲线。 根据本发明的补偿图案在半色调补偿区域之前和之后具有对准标记。 对准标记提供打印机像素网格和扫描像素网格之间的对准。 测量和分析每个对准标记的线宽和每个灰度级部分的每个像素列中的灰度级，以产生每个像素列和相关线宽的局部色调再现曲线。 可以重新测量对准标记的线宽，以调整本地色调再现曲线，以补偿打印时的条纹缺陷。

    Method and apparatus for controlling non-uniform banding and residual toner density using feedback control
    45.
    发明授权
    Method and apparatus for controlling non-uniform banding and residual toner density using feedback control 有权
    使用反馈控制控制不均匀条带和残留调色剂浓度的方法和装置

    公开(公告)号：US07054568B2

    公开(公告)日：2006-05-30

    申请号：US10793902

    申请日：2004-03-08

    申请人： Howard A. Mizes ,  Shu Chang ,  Anne-Claire K. Markle ,  Nancy B. Goodman ,  Gerald M. Fletcher

    发明人： Howard A. Mizes ,  Shu Chang ,  Anne-Claire K. Markle ,  Nancy B. Goodman ,  Gerald M. Fletcher

    IPC分类号： G03G15/00 ,  G03G15/08

    CPC分类号： G03G15/5058 ,  G03G15/5041 ,  G03G2215/00037

    摘要： A system and method of determining a residual toner mass on a receiving member includes providing one or more test patterns to the receiving member, transferring the test patterns from the receiving member to a transfer medium, determining a sensor signal obtained after transfer, processing the sensor signal obtained after transfer and determining an amount of residual toner mass based on the processed sensor signal. A xerographic marking device also includes a receiving member, an array-type optical sensor or a point optical sensor arranged on the receiving member, and a controller that generates one or more test patterns, transfers the test patterns to a transfer medium, determines a sensor signal obtained after the transfer by the optical sensors, processes the determined sensor signal, and determines an amount of residual toner mass based on the processed sensor signal.

    摘要翻译： 一种确定接收构件上的残留调色剂质量的系统和方法包括：向接收构件提供一个或多个测试图案，将测试图案从接收构件传送到转印介质，确定在传送之后获得的传感器信号，处理传感器 信号，并基于处理的传感器信号确定残留调色剂质量的量。 静电印迹标记装置还包括接收构件，布置在接收构件上的阵列型光学传感器或点光学传感器，以及产生一个或多个测试图案的控制器，将测试图案传送到转印介质，确定传感器 通过光学传感器传送之后获得的信号，处理确定的传感器信号，并且基于处理的传感器信号确定残留调色剂质量的量。

    System and Method for Aligning Duplex Images Using Alignment Marks
    48.
    发明申请
    System and Method for Aligning Duplex Images Using Alignment Marks 有权
    使用对齐标记对齐双面图像的系统和方法

    公开(公告)号：US20140015909A1

    公开(公告)日：2014-01-16

    申请号：US13546259

    申请日：2012-07-11

    申请人： Roger G. Leighton ,  Michael F. Leo ,  Vincent M. Williams ,  Howard A. Mizes

    发明人： Roger G. Leighton ,  Michael F. Leo ,  Vincent M. Williams ,  Howard A. Mizes

    IPC分类号： B41J2/01

    CPC分类号： B65H23/32 ,  B41J3/60 ,  B41J11/46 ,  B41J15/04 ,  B65H2511/512 ,  B65H2220/01

    摘要： A system and method for adjusting a transport path length of a continuous web of recording media in a printing system printing duplex images. The method includes detecting alignment marks, for instance top of form (TOF) marks, on the continuous web of print media and adjusting the path length to provide substantially accurate registration of first and second images on opposite sides of the web for duplex imaging. The system to adjust path length includes idler rollers movable with respect to turnbar rollers.

    摘要翻译： 一种在打印双面图像的打印系统中调节记录介质的连续卷材的传送路径长度的系统和方法。 该方法包括检测对准标记，例如在打印介质的连续卷材上的形状（TOF）标记的顶部，并且调整路径长度以提供用于双面成像的幅材的相对侧上的第一和第二图像的基本准确的配准。 调整路径长度的系统包括相对于转向滚轮可移动的空转辊。

    Methods and systems achieving print uniformity using reduced memory or computational requirements
    49.
    发明授权
    Methods and systems achieving print uniformity using reduced memory or computational requirements 有权
    使用减少的记忆或计算要求实现打印均匀性的方法和系统

    公开(公告)号：US08305660B2

    公开(公告)日：2012-11-06

    申请号：US10922316

    申请日：2004-08-19

    申请人： Yeqing (Juliet) Zhang ,  Daniel E. Viassolo ,  Susan J. Zoltner ,  Howard A. Mizes ,  Robert P. Loce

    发明人： Yeqing (Juliet) Zhang ,  Daniel E. Viassolo ,  Susan J. Zoltner ,  Howard A. Mizes ,  Robert P. Loce

    IPC分类号： H04N1/46 ,  H04N1/42

    CPC分类号： H04N1/407 ,  H04N1/4097

    摘要： Engine response curves (RCs) can be used for streak compensation for printed documents. A feedback control paradigm can be included to effect RC compensation. Singular Value Decomposition (SVD) can be used to represent each RC in the collection of spatial RC data as a linear combination of basis vectors. RCs are approximated by selecting the first few basis vectors, the approximation aiding in noise rejection and reducing computation in the controller by reducing dimensionality of the RC data from gray levels to the number of SVD bases selected. An optimal subset of RCs is selectable from the set of approximated RCs by clustering the SVD weights, the clustered SVD weights producing TRCs that span all engine response RCs generated by a printer. Compensation RCs are constructible using reduced number of bases and clustered SVD weights.

    摘要翻译： 发动机响应曲线（RC）可用于印刷文件的条纹补偿。 可以包括反馈控制范例来实现RC补偿。 奇异值分解（SVD）可以用于将空间RC数据的集合中的每个RC表示为基向量的线性组合。 通过选择前几个基本矢量近似，近似有助于噪声抑制，并通过将RC数据从灰度级降低到所选择的SVD基数来减少控制器中的计算。 通过对SVD权重进行聚类，可从集合的近似RC中选择RC的最佳子集，产生跨越由打印机产生的所有发动机响应RC的TRC的聚类SVD权重。 补偿RC可以使用减少的基数和聚类SVD权重来构建。

    Method and system for printhead alignment to compensate for dimensional changes in a media web in an inkjet printer
    50.
    发明授权
    Method and system for printhead alignment to compensate for dimensional changes in a media web in an inkjet printer 有权
    用于打印头对准的方法和系统，以补偿喷墨打印机中的介质网中的尺寸变化

    公开(公告)号：US08292398B2

    公开(公告)日：2012-10-23

    申请号：US12780645

    申请日：2010-05-14

    申请人： Howard A. Mizes ,  R. Enrique Viturro ,  David A. Mantell ,  Jeffrey J. Folkins

    发明人： Howard A. Mizes ,  R. Enrique Viturro ,  David A. Mantell ,  Jeffrey J. Folkins

    IPC分类号： B41J29/393

    CPC分类号： B41J2/2132 ,  B41J2/17593 ,  B41J2/2146 ,  B41J29/393

    摘要： A method enables a controller to align printheads in a printer. The method includes identifying a first cross-process position for each printhead in a plurality of printheads in a printer with reference to image data of a test pattern printed by the plurality of printheads on a media substrate, identifying a second cross-process position for each printhead in the plurality of printheads, calculating a printhead cross-process position error between the identified first cross-process position and the identified second cross-process position for each printhead, comparing a maximum printhead cross-process position error to a predetermined threshold, and operating a plurality of actuators with reference to the calculated printhead cross-process position errors to reposition the printheads in the plurality of printheads in response to the maximum printhead cross-process position error being equal to or less than the predetermined threshold.

    摘要翻译： 一种方法使控制器可以将打印头对准打印机。 该方法包括：参照由介质基板上的多个打印头印刷的测试图案的图像数据，识别打印机中多个打印头中的每个打印头的第一交叉处理位置，识别每个打印头的第二交叉处理位置 打印头在多个打印头中计算每个打印头的识别的第一交叉处理位置和所识别的第二交叉处理位置之间的打印头交叉过程位置误差，将最大打印头交叉过程位置误差与预定阈值进行比较，以及 响应于最大打印头交叉处理位置误差等于或小于预定阈值，参考所计算的打印头交叉处理位置误差来操作多个致动器，以重新定位多个打印头中的打印头。