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    Methods and systems achieving print uniformity using reduced memory or computational requirements
    1.
    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。

    METHODS AND SYSTEMS ACHIEVING PRINT UNIFORMITY USING REDUCED MEMORY OR COMPUTATIONAL REQUIREMENTS
    2.
    发明申请
    METHODS AND SYSTEMS ACHIEVING PRINT UNIFORMITY USING REDUCED MEMORY OR COMPUTATIONAL REQUIREMENTS 有权
    使用减少内存或计算要求实现打印均匀性的方法和系统

    公开(公告)号：US20100231942A1

    公开(公告)日：2010-09-16

    申请号：US12786694

    申请日：2010-05-25

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

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

    IPC分类号： G06F15/00

    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。

    Methods and systems for achieving print uniformity using reduced memory or computational requirements
    3.
    发明授权
    Methods and systems for achieving print uniformity using reduced memory or computational requirements 有权
    使用减少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：US08705120B2

    公开(公告)日：2014-04-22

    申请号：US12786694

    申请日：2010-05-25

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

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

    IPC分类号： H04N1/46 ,  H04N1/60

    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。

    Reducing printhead process color non-uniformities in a direct marking device
    5.
    发明授权
    Reducing printhead process color non-uniformities in a direct marking device 有权
    在直接打标设备中减少打印头处理颜色不均匀性

    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。

    System and method for compensating for streaks in images using intensity variation of raster output scanner
    7.
    发明授权
    System and method for compensating for streaks in images using intensity variation of raster output scanner 有权
    使用光栅输出扫描仪的强度变化补偿图像条纹的系统和方法

    公开(公告)号：US07542171B2

    公开(公告)日：2009-06-02

    申请号：US10872922

    申请日：2004-06-21

    申请人： Daniel E. Viassolo ,  Howard A. Mizes ,  Shawn P. Updegraff

    发明人： Daniel E. Viassolo ,  Howard A. Mizes ,  Shawn P. Updegraff

    IPC分类号： H04N1/40 ,  H04N1/46 ,  G06T5/00

    CPC分类号： H04N1/4015

    摘要： A method and system compensates for streak defects in an image formed using a raster output scanning device. A reflectance profile is generated from an image generated by the raster output scanning device. Thereafter, a difference profile is determined. The difference profile is determined based upon the generated reflectance profile and a uniform profile. A compensation profile is generated based on the determined difference profile. The compensation profile represents a change in an intensity profile for the raster output scanning device.

    摘要翻译： 一种方法和系统补偿使用光栅输出扫描装置形成的图像中的条纹缺陷。 从由光栅输出扫描装置生成的图像产生反射率分布。 此后，确定差异轮廓。 基于生成的反射率分布和均匀的轮廓来确定差分轮廓。 基于确定的差异轮廓产生补偿曲线。 补偿曲线表示光栅输出扫描装置的强度分​​布的变化。

    Method of adjusting print uniformity
    8.
    发明授权
    Method of adjusting print uniformity 有权
    调整打印均匀性的方法

    公开(公告)号：US06819352B2

    公开(公告)日：2004-11-16

    申请号：US10342543

    申请日：2003-01-15

    申请人： Howard A. Mizes ,  Daniel E. Viassolo

    发明人： Howard A. Mizes ,  Daniel E. Viassolo

    IPC分类号： B41J247

    CPC分类号： G06K15/1247 ,  G06K15/027 ,  H04N1/4015

    摘要： A method of adjusting print uniformity in a xerographic device is provided. The method includes: a) printing a test pattern, b) transferring the printed test pattern to a scanner, c) scanning the printed test pattern and detecting line information, d) communicating the detected information to a computer, e) determining measurements from the detected line information, f) calculating the difference between the measurements and target values, and g) depending on the difference, adjusting a current supplied to an individual LED of an LED printbar associated with the measurement to reduce the difference. In one aspect, a test pattern line is associated with an individual LED. In another aspect, test pattern lines are associated with two adjacent LEDs and three adjacent LEDs. In yet another aspect, the test pattern includes dotted lines. In still another aspect, the invention includes a xerographic device with an LED printbar, a computer, and a scanner device.

    摘要翻译： 提供了一种在静电印刷设备中调整印刷均匀性的方法。 该方法包括：a）打印测试图案，b）将打印的测试图案传送到扫描器，c）扫描打印的测试图案和检测线路信息，d）将检测到的信息传送到计算机，e） 检测线信息，f）计算测量值和目标值之间的差值，以及g）根据该差异，调节与测量相关联的LED打印机的单独LED的电流，以减小差异。 在一个方面，测试图案线与单独的LED相关联。 在另一方面，测试图案线与两个相邻的LED和三个相邻的LED相关联。 在另一方面，测试图案包括虚线。 在另一方面，本发明包括具有LED打印条，计算机和扫描仪装置的静电复印装置。

    Active compensation of streaks using spatial filtering and feedback control
    9.
    发明授权
    Active compensation of streaks using spatial filtering and feedback control 有权
    使用空间滤波和反馈控制对条纹进行有效补偿

    公开(公告)号：US07424169B2

    公开(公告)日：2008-09-09

    申请号：US10641553

    申请日：2003-08-15

    申请人： Daniel E. Viassolo ,  Howard A. Mizes

    发明人： Daniel E. Viassolo ,  Howard A. Mizes

    IPC分类号： G06K9/40 ,  G06K15/00 ,  G06T5/00 ,  H04N1/407 ,  H04N1/409 ,  H04N1/46 ,  H04N9/64

    CPC分类号： G06T5/001 ,  G06T5/20 ,  G06T2207/10008 ,  G06T2207/30176 ,  H04N1/409

    摘要： An image processing method to reduce streaking on a printed sheet uses a negative feedback system to reduce streaking. The method scans a printed sheet to produce image data. The method further measures gray-levels of the image data and computes a compensation vector from the measured gray-levels as the difference between a nominal tonal-resproduction-curve and local tonal-reproduction-curves. The compensation vector is applied the image data to be printed. The compensation vector emphasizes ranges of frequencies sensitive of the human eye.

    摘要翻译： 减少打印纸上的划痕的图像处理方法使用负反馈系统来减少条纹。 该方法扫描打印的纸张以产生图像数据。 该方法进一步测量图像数据的灰度级，并从所测量的灰度级计算补偿矢量作为标称色调响应曲线与局部色调再生曲线之间的差值。 将补偿矢量应用于要打印的图像数据。 补偿矢量强调人眼敏感的频率范围。

    Measurement and control of high frequency banding in a marking system
    10.
    发明授权
    Measurement and control of high frequency banding in a marking system 有权
    标记系统中高频带测量与控制

    公开(公告)号：US07283143B2

    公开(公告)日：2007-10-16

    申请号：US10852243

    申请日：2004-05-25

    申请人： Howard A. Mizes ,  Beilei Xu ,  Chu-heng Liu ,  Robert P. Loce ,  Michael D. Thompson ,  Eric S. Hamby ,  R. Enrique Viturro

    发明人： Howard A. Mizes ,  Beilei Xu ,  Chu-heng Liu ,  Robert P. Loce ,  Michael D. Thompson ,  Eric S. Hamby ,  R. Enrique Viturro

    IPC分类号： G03G21/00

    CPC分类号： H04N1/00002 ,  H04N1/00015 ,  H04N1/00031 ,  H04N1/00045 ,  H04N1/00053 ,  H04N1/00063 ,  H04N1/00068 ,  H04N1/00087

    摘要： A method of measuring and controlling high frequency banding, the method includes creating a test pattern, sensing the test pattern with optical sensors, determining a beat frequency based on the sensed test pattern, and determining the frequency, phase and amplitude of high frequency banding based on the beat frequency. An exemplary embodiment of a feedback control method for controlling high frequency banding includes creating a test pattern, sensing the test pattern with optical sensors, measuring high frequency banding and adjusting the imaging parameters based on the measured high frequency banding in order to decrease the extent of high frequency banding. Moreover, an exemplary embodiment of a system for measuring high frequency banding includes an image marking device having a receiving member, optical sensors arranged on the receiving member, and a controller that is functionally coupled to the optical sensors and to the marking device.

    摘要翻译： 一种测量和控制高频带的方法，该方法包括创建测试图案，用光学传感器感测测试图案，基于感测到的测试图案确定拍频，以及确定基于高频带的频率，相位和幅度 在拍频上 用于控制高频带的反馈控制方法的示例性实施例包括创建测试图案，用光学传感器感测测试图案，测量高频带并基于所测量的高频带来调整成像参数，以便降低 高频带。 此外，用于测量高频带的系统的示例性实施例包括具有接收构件的图像标记装置，布置在接收构件上的光学传感器以及功能上耦合到光学传感器和标记装置的控制器。