公开(公告)号：US20060222387A1

公开(公告)日：2006-10-05

申请号：US11094454

申请日：2005-03-31

申请人： Aaron Burry ,  Christopher Dirubio ,  Gerald Fletcher ,  Eric Hamby ,  Martin Krucinski ,  Robert Mead ,  Bruce Parks ,  Peter Paul ,  Palghat Ramesh ,  Eliud Robles Flores ,  Fei Xiao

发明人： Aaron Burry ,  Christopher Dirubio ,  Gerald Fletcher ,  Eric Hamby ,  Martin Krucinski ,  Robert Mead ,  Bruce Parks ,  Peter Paul ,  Palghat Ramesh ,  Eliud Robles Flores ,  Fei Xiao

IPC分类号： G03G15/00

CPC分类号： G03G15/1645 ,  G03G15/5041 ,  G03G2215/00037 ,  G03G2215/00059

摘要： A defect analysis system for a xerographic print engine includes a residual mass sensor that senses the two-dimensional signature structure of residual mass remaining on a photoconductive or other substrate surface after image transfer. Preferably, the sensor is a full width array that spans substantially an entire width of the photoconductive surface. This information is then processed and analyzed to determine a specific type of transfer defect present. This may include the quantified level of defect for each detected type. The defect analysis system may also include a closed-loop control system that can adjust various xerographic process parameters using feedback based on the identification and optionally magnitude of each specific defect type. The identified print quality defect, such as mottle, streaks, point deletions, graininess, etc. can then be used to determine a customized corrective control action to be taken by the feedback control of the xerographic print engine to remedy or compensate for the defect(s).

摘要翻译： 用于静电印刷引擎的缺陷分析系统包括残余质量传感器，其在图像转印之后感测残留在光导或其它基底表面上的残留质量的二维签名结构。 优选地，传感器是基本上跨越光电导表面的整个宽度的全宽阵列。 然后对该信息进行处理和分析，以确定存在的特定类型的转移缺陷。 这可能包括每种检测类型的量化的缺陷水平。 缺陷分析系统还可以包括闭环控制系统，其可以使用基于每个特定缺陷类型的识别和可选大小的反馈来调整各种静电印迹过程参数。 然后可以使用所识别的打印质量缺陷，例如斑驳，条纹，点删除，颗粒度等来确定由静电印刷机的反馈控制采取的定制的校正控制动作来补救或补偿缺陷（ s）。

公开(公告)号：US08355639B2

公开(公告)日：2013-01-15

申请号：US12877709

申请日：2010-09-08

申请人： Peter Paul ,  Palghat Ramesh ,  Eric Michael Gross

发明人： Peter Paul ,  Palghat Ramesh ,  Eric Michael Gross

IPC分类号： G03G15/00

CPC分类号： G03G15/5058 ,  G03G15/0131 ,  G03G15/5062 ,  G03G2215/0132

摘要： A diagnostic method for color stability in an image printing system includes printing a test pattern onto output media; measuring, during the printing of the test pattern, an image of the test pattern on an image transfer surface using one or more image transfer surface sensors to obtain one or more image transfer surface signals; measuring a printed image of the test pattern on the output media using a printed image sensor to obtain a printed image signal; calculating correlation functions for the one or more image transfer surface signals and the printed image signal; and analyzing the correlation functions for the one or more image transfer surface signals and the printed image signal to identify a subsystem in the image printing system that causes variations in color within the plurality of prints of the test pattern.

摘要翻译： 图像打印系统中的颜色稳定性的诊断方法包括将测试图案打印到输出介质上; 在打印测试图形期间，使用一个或多个图像转印表面传感器测量图像转印表面上的测试图案的图像，以获得一个或多个图像转印表面信号; 使用打印的图像传感器测量输出介质上的测试图案的打印图像以获得打印的图像信号; 计算一个或多个图像传送表面信号和打印的图像信号的相关函数; 以及分析所述一个或多个图像转印表面信号和所述打印图像信号的相关函数，以识别所述图像打印系统中引起所述测试图案的所述多个打印中的颜色变化的子系统。

公开(公告)号：US08351080B2

公开(公告)日：2013-01-08

申请号：US12555308

申请日：2009-09-08

申请人： Palghat Ramesh ,  Peter Paul

发明人： Palghat Ramesh ,  Peter Paul

IPC分类号： G06F15/00

CPC分类号： H04N1/58

摘要： A method, system, and computer program product for estimating a banding profile in an image printing system is disclosed. The method includes obtaining image data across multiple measurement intervals by one or more sensors; combining the image data with timing information into a coherent signal by a processor; estimating periodic and aperiodic components of the coherent signal using least squares estimation by the processor, wherein the periodic component represents a banding profile; and wherein at least the periodic component is used to generate an output.

摘要翻译： 公开了一种用于估计图像打印系统中的条带轮廓的方法，系统和计算机程序产品。 该方法包括通过一个或多个传感器跨多个测量间隔获得图像数据; 通过处理器将图像数据与定时信息组合成相干信号; 使用所述处理器的最小二乘估计来估计所述相干信号的周期性和非周期分量，其中所述周期性分量表示带状分布; 并且其中至少所述周期性分量用于产生输出。

公开(公告)号：US08351079B2

公开(公告)日：2013-01-08

申请号：US12555275

申请日：2009-09-08

申请人： Palghat Ramesh ,  Peter Paul

发明人： Palghat Ramesh ,  Peter Paul

IPC分类号： G06F15/00

CPC分类号： H04N1/29 ,  G03G15/0194 ,  G03G15/5062 ,  G03G2215/0129 ,  G03G2215/0161 ,  H04N1/506

摘要： A method, system, and computer program product for estimating a banding profile in an image printing system is disclosed. The method includes obtaining image data across multiple measurement intervals by a sensor; combining the image data with timing information into a coherent signal by a processor; determining aperiodic components of the coherent signal by the processor; determining the periodic component of the coherent signal using spline interpolation, wherein the periodic component represents a banding profile, by the processor; and printing an output print with a correction applied based on the banding profile.

摘要翻译： 公开了一种用于估计图像打印系统中的条带轮廓的方法，系统和计算机程序产品。 该方法包括通过传感器跨多个测量间隔获得图像数据; 通过处理器将图像数据与定时信息组合成相干信号; 由处理器确定相干信号的非周期分量; 使用所述处理器，使用样条插值来确定所述相干信号的周期分量，其中所述周期分量表示条带简档; 并且基于条带轮廓来打印具有应用的校正的输出打印。

公开(公告)号：US08649566B2

公开(公告)日：2014-02-11

申请号：US12838942

申请日：2010-07-19

申请人： Beilei Xu ,  Wencheng Wu ,  Peter Paul ,  Palghat Ramesh

发明人： Beilei Xu ,  Wencheng Wu ,  Peter Paul ,  Palghat Ramesh

IPC分类号： G06K9/00 ,  G06K9/03 ,  G06K9/20

CPC分类号： H04N1/00002 ,  G06K9/036 ,  H04N1/00018 ,  H04N1/00047 ,  H04N1/00084

摘要： A method for detecting motion quality error of printed documents having text in a printing system includes: printing a document having text lines, each text line comprising a plurality of characters; scanning the printed document to generate a scanned image; detecting positions in a process direction of the printing system of one of text lines and characters in the scanned image; determining position errors in the process direction in the printed document based on the detected positions in the scanned image; determining at least one motion quality defect of the printing system in the process direction based on the determined position errors; and initiating an activity associated with said printing system in response to a motion quality error having been determined. A system for detecting motion quality error of printed documents is also disclosed.

摘要翻译： 一种用于检测在打印系统中具有文本的打印文档的运动质量错误的方法，包括：打印具有文本行的文档，每个文本行包括多个字符; 扫描打印文档以生成扫描图像; 检测所述扫描图像中的文本行和文字之一的所述打印系统的处理方向的位置; 基于扫描图像中检测到的位置确定打印文档中的处理方向上的位置误差; 基于所确定的位置误差，确定所述打印系统在所述处理方向上的至少一个运动质量缺陷; 以及响应于已经确定的运动质量错误，发起与所述打印系统相关联的活动。 还公开了一种用于检测打印文件的运动质量误差的系统。

公开(公告)号：US08542410B2

公开(公告)日：2013-09-24

申请号：US12555287

申请日：2009-09-08

申请人： Palghat Ramesh ,  Peter Paul

发明人： Palghat Ramesh ,  Peter Paul

IPC分类号： H04N1/407 ,  G03G15/00 ,  G03G15/01

CPC分类号： G03G15/5058 ,  G03G15/0131 ,  G03G15/0194 ,  G03G2215/00059 ,  G03G2215/00067 ,  G03G2215/0129 ,  G03G2215/0164

摘要： A method, system, and computer program product for estimating exposure modulation in an image printing system is disclosed. The method includes determining a banding profile for an image printing system by a processor; determining an adjusted exposure modulation profile based on the banding profile using a least squares estimation by the processor; and printing an output based on the adjusted exposure profile.

摘要翻译： 公开了一种用于估计图像打印系统中的曝光调制的方法，系统和计算机程序产品。 该方法包括由处理器确定图像打印系统的条带简档; 使用所述处理器的最小二乘估计，基于所述条带轮廓来确定调整的曝光调制轮廓; 并根据经调整的曝光轮廓打印输出。

公开(公告)号：US20120057885A1

公开(公告)日：2012-03-08

申请号：US12877709

申请日：2010-09-08

申请人： Peter Paul ,  Palghat Ramesh ,  Eric Michael Gross

发明人： Peter Paul ,  Palghat Ramesh ,  Eric Michael Gross

IPC分类号： G03G15/00

CPC分类号： G03G15/5058 ,  G03G15/0131 ,  G03G15/5062 ,  G03G2215/0132

摘要： A diagnostic method for color stability in an image printing system includes printing a test pattern onto output media; measuring, during the printing of the test pattern, an image of the test pattern on an image transfer surface using one or more image transfer surface sensors to obtain one or more image transfer surface signals; measuring a printed image of the test pattern on the output media using a printed image sensor to obtain a printed image signal; calculating correlation functions for the one or more image transfer surface signals and the printed image signal; and analyzing the correlation functions for the one or more image transfer surface signals and the printed image signal to identify a subsystem in the image printing system that causes variations in color within the plurality of prints of the test pattern.

摘要翻译： 图像打印系统中的颜色稳定性的诊断方法包括将测试图案打印到输出介质上; 在打印测试图形期间，使用一个或多个图像转印表面传感器测量图像转印表面上的测试图案的图像，以获得一个或多个图像转印表面信号; 使用打印的图像传感器测量输出介质上的测试图案的打印图像以获得打印的图像信号; 计算一个或多个图像传送表面信号和打印的图像信号的相关函数; 以及分析所述一个或多个图像转印表面信号和所述打印图像信号的相关函数，以识别所述图像打印系统中引起所述测试图案的所述多个打印中的颜色变化的子系统。

公开(公告)号：US20120014566A1

公开(公告)日：2012-01-19

申请号：US12838942

申请日：2010-07-19

申请人： Beilei Xu ,  Wencheng Wu ,  Peter Paul ,  Palghat Ramesh

发明人： Beilei Xu ,  Wencheng Wu ,  Peter Paul ,  Palghat Ramesh

IPC分类号： G06K9/00

CPC分类号： H04N1/00002 ,  G06K9/036 ,  H04N1/00018 ,  H04N1/00047 ,  H04N1/00084

摘要： A method for detecting motion quality error of printed documents having text in a printing system includes: printing a document having text lines, each text line comprising a plurality of characters; scanning the printed document to generate a scanned image; detecting positions in a process direction of the printing system of one of text lines and characters in the scanned image; determining position errors in the process direction in the printed document based on the detected positions in the scanned image; determining at least one motion quality defect of the printing system in the process direction based on the determined position errors; and initiating an activity associated with said printing system in response to a motion quality error having been determined. A system for detecting motion quality error of printed documents is also disclosed.

摘要翻译： 一种用于检测在打印系统中具有文本的打印文档的运动质量错误的方法，包括：打印具有文本行的文档，每个文本行包括多个字符; 扫描打印文档以生成扫描图像; 检测所述扫描图像中的文本行和文字之一的所述打印系统的处理方向的位置; 基于扫描图像中检测到的位置确定打印文档中的处理方向上的位置误差; 基于所确定的位置误差，确定所述打印系统在所述处理方向上的至少一个运动质量缺陷; 以及响应于已经确定的运动质量错误，发起与所述打印系统相关联的活动。 还公开了一种用于检测打印文件的运动质量误差的系统。

公开(公告)号：US20070092274A1

公开(公告)日：2007-04-26

申请号：US11253724

申请日：2005-10-20

申请人： Palghat Ramesh ,  Peter Paul

发明人： Palghat Ramesh ,  Peter Paul

IPC分类号： G03G15/00

CPC分类号： G03G15/5062 ,  G03G2215/00042

摘要： A system and method for correcting a defect in an image, such as a ghost defect or a reload defect, by compensating for the defect. Various exemplary embodiments include creating a defect model with a source target function that represents a source level with respect to a target level; inputting a test image to an image path actuator; inputting an output of the image path actuator to a marking engine; creating a test output image; measuring the test data on the test output image; inputting the test measurement data obtained from the test output image to a controller; inputting state data representing a state of the imaging device to the controller; inputting previously printed images to the controller; inputting current image to the controller, outputting an image correction factor from the controller based on the test image measurement data, the state data, the previously printed images, and the current image to the image path actuator; and creating a corrected image based on the image correction factor output from the controller.

摘要翻译： 通过补偿缺陷来校正图像中的缺陷，例如重影缺陷或重新加载缺陷的系统和方法。 各种示例性实施例包括创建具有代表相对于目标水平的源级别的源目标函数的缺陷模型; 将测试图像输入到图像路径致动器; 将图像路径致动器的输出输入到标记引擎; 创建测试输出图像; 测试测试输出图像上的测试数据; 将从测试输出图像获得的测试测量数据输入到控制器; 将表示成像装置的状态的状态数据输入到控制器; 将先前打印的图像输入到控制器; 将当前图像输入到控制器，基于测试图像测量数据，状态数据，先前打印的图像和当前图像将图像校正因子从控制器输出到图像路径致动器; 以及基于从控制器输出的图像校正因子创建校正图像。

公开(公告)号：US08964256B2

公开(公告)日：2015-02-24

申请号：US12112618

申请日：2008-04-30

申请人： R. Enrique Viturro ,  Peter Paul

发明人： R. Enrique Viturro ,  Peter Paul

IPC分类号： G06T5/00 ,  H04N1/407 ,  H04N1/409 ,  H04N1/401 ,  H04N1/29 ,  G03G15/00 ,  H04N1/12

CPC分类号： H04N1/4015 ,  G03G15/5041 ,  G03G2215/00042 ,  H04N1/12 ,  H04N1/295 ,  H04N1/4076

摘要： Systems and methods are provided for compensating for streak defects in images formed by an image forming device, such as a digital printer. The systems and methods include using both modulation of a raster output scanner (ROS actuation) and spatially varying tone reproduction curve (STRC actuation) in a common control system for improving streak correction. Low spatial frequency large amplitude streak defects are corrected using ROS actuation and high spatial frequency streak defects, as well as any residual low frequency defects, are corrected using STRC actuation.

摘要翻译： 提供了系统和方法来补偿由诸如数字打印机的图像形成装置形成的图像中的条纹缺陷。 该系统和方法包括在公共控制系统中使用光栅输出扫描器（ROS致动）的调制和空间变化色调再现曲线（STRC致动），以改善条纹校正。 使用ROS驱动校正低空间频率大幅度条纹缺陷，并且使用STRC致动校正高空间频率条纹缺陷以及任何残留的低频缺陷。