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1. 发明授权

US07110144B2 System and method of performing halftone gamma correction in a printing environment 有权
公开(公告)号：US07110144B2
公开(公告)日：2006-09-19
申请号：US09947838
申请日：2001-09-05
申请人： Shirley Cheng , Mark A. Gwaltney , Robert P. Loce , Martin S. Maltz , Connie F. Purdum
发明人： Shirley Cheng , Mark A. Gwaltney , Robert P. Loce , Martin S. Maltz , Connie F. Purdum
IPC分类号： H04N1/405 , G06K15/00 , G03F3/08
CPC分类号： H04N1/4078
摘要： Method, system and computer-readable medium containing instructions for performing halftone gamma correction in a printing environment to achieve and maintain high print quality. The system includes one or more subsystems, including a tone reproduction subsystem that creates one or more print calibration pages, each having a tone curve defining a relationship between a plurality of input color levels, output color levels and a level of measured darkness. A pixel adjustment subsystem associates each input color level with one of the output color levels based on a desired percentage change in the level of measured darkness. Further, a gamma correction system performs gamma correction on a selected tone curve of one of the print calibration pages by associating each input color level with one of the output color levels based on the desired percentage change in the level of measured darkness in a substantially flat region of the selected tone curve.

2. 发明授权

US07688473B2 Tinted edge enhancement using harmonic halftones for the boundary pixels 有权
标题翻译：带边缘增强使用谐波半色调为边界像素
公开(公告)号：US07688473B2
公开(公告)日：2010-03-30
申请号：US10973725
申请日：2004-10-26
申请人： Connie F. Purdum , Robert P. Loce , Beilei Xu , David J. Lieberman , Mark A. Gwaltney , Jon S. McElvain , Charles M. Hains
发明人： Connie F. Purdum , Robert P. Loce , Beilei Xu , David J. Lieberman , Mark A. Gwaltney , Jon S. McElvain , Charles M. Hains
IPC分类号： H04N1/409
CPC分类号： H04N1/4092 , H04N1/4058
摘要： Disclosed herein is an image processing method for producing enhanced halftone edges, particularly suited to those edges which only lie upon the background as apposed to those edges which abut other halftone screens. It utilizes a step of defining border pixels and a step of halftoning those border pixels in a different manner than the halftoning applied to the interior region of the tint or image segment. The preferred halftone for the border pixels will be related to the interior halftone by some number of common spatial frequency harmonics. Examples of common-harmonic screening for an edge include, but are not limited to: (a) same screen with different tone reproduction characteristics (boosted edge values); (b) same screen angles and frequencies with a different spot function, possibly phase shifted; (c) a dot screen whose frequency vectors can be generated by the frequency vectors of the interior screen; (d) a line screen whose frequency vectors can be generated by the frequency vectors of the interior screen. This generation process is directed to ensuring that the two screens will be “harmonically matched” where at least one of the fundamental frequency vectors and harmonics of the first screen will equal at least one of the fundamental frequency vectors and harmonics of the second screen.
摘要翻译：本文公开了一种用于生产增强的半色调边缘的图像处理方法，特别适合于仅靠在与其它半色调屏幕相邻的那些边缘上的背景的那些边缘。它利用定义边框像素的步骤和以与应用于色调或图像片段的内部区域的半色调不同的方式对这些边界像素进行半色调的步骤。用于边框像素的优选半色调将通过若干数量的共同空间频率谐波与内部半色调相关。用于边缘的共谐波筛选的示例包括但不限于：（a）具有不同色调再现特性（增强边缘值）的相同屏幕; （b）具有不同光点功能的相同屏幕角度和频率，可能相移; （c）可以通过内部画面的频率矢量生成频率矢量的点画面; （d）可以通过内部画面的频率矢量生成其频率矢量的行画面。该生成处理旨在确保两个屏幕将被“谐波匹配”，其中基本频率矢量和第一屏幕的谐波中的至少一个将等于第二屏幕的基本频率矢量和谐波中的至少一个。

3. 发明授权

US07639389B2 Memory for diagnosing imaging component failure 有权
标题翻译：用于诊断成像部件故障的内存
公开(公告)号：US07639389B2
公开(公告)日：2009-12-29
申请号：US11609409
申请日：2006-12-12
申请人： Paul M. Butterfield , Mark A. Gwaltney , Connie F. Purdum , Carlos O. Alva
发明人： Paul M. Butterfield , Mark A. Gwaltney , Connie F. Purdum , Carlos O. Alva
IPC分类号： G06K15/02 , G06T3/40 , G06F3/12 , H04N1/393
CPC分类号： H04N1/00002 , H04N1/00015 , H04N1/00031 , H04N1/00039 , H04N1/00045 , H04N1/00053 , H04N1/00063 , H04N2201/0082
摘要： Test image data is introduced into the image processing path of a marking device, at various points prior to the marking engine. Comparison of output of the marking engine from various sources of image data is made to diagnose imaging path component failure. Imaging data at various points in the image processing path is captured for analysis as part of component failure diagnosis. Various memory devices are used to both introduce test data at various points in the image processing path and capture data at various points of the image processing path.
摘要翻译：测试图像数据在标记引擎之前的各个点处被引入到标记装置的图像处理路径中。比较来自各种图像数据的标记引擎的输出，以诊断成像路径组件故障。作为组件故障诊断的一部分，捕获图像处理路径中各点的成像数据进行分析。各种存储器件用于在图像处理路径中的各个点引入测试数据并在图像处理路径的各个点处捕获数据。

4. 发明申请

US20080137124A1 MEMORY FOR DIAGNOSING IMAGING COMPONENT FAILURE 有权
标题翻译：用于诊断成像组件故障的记忆
公开(公告)号：US20080137124A1
公开(公告)日：2008-06-12
申请号：US11609409
申请日：2006-12-12
申请人： Paul M. Butterfield , Mark A. Gwaltney , Connie F. Purdum , Carlos O. Alva
发明人： Paul M. Butterfield , Mark A. Gwaltney , Connie F. Purdum , Carlos O. Alva
IPC分类号： G06F15/00 , G05B23/00
CPC分类号： H04N1/00002 , H04N1/00015 , H04N1/00031 , H04N1/00039 , H04N1/00045 , H04N1/00053 , H04N1/00063 , H04N2201/0082
摘要： Test image data is introduced into the image processing path of a marking device, at various points prior to the marking engine. Comparison of output of the marking engine from various sources of image data is made to diagnose imaging path component failure. Imaging data at various points in the image processing path is captured for analysis as part of component failure diagnosis. Various memory devices are used to both introduce test data at various points in the image processing path and capture data at various points of the image processing path.
摘要翻译：测试图像数据在标记引擎之前的各个点处被引入到标记装置的图像处理路径中。比较来自各种图像数据的标记引擎的输出，以诊断成像路径组件故障。作为组件故障诊断的一部分，捕获图像处理路径中各点的成像数据进行分析。各种存储器件用于在图像处理路径中的各个点引入测试数据并在图像处理路径的各个点处捕获数据。

5. 发明授权

US5600430A Split recharge method and apparatus for color image formation 失效
标题翻译：分色补充方法和彩色图像形成装置
公开(公告)号：US5600430A
公开(公告)日：1997-02-04
申请号：US347617
申请日：1994-11-30
申请人： Jeffrey J. Folkins , Roger L. Bullock , Thomas J. Fleck , Kenneth W. Pietrowski , Charles H. Tabb , Zhao-Zhi Yu , Mark A. Gwaltney
发明人： Jeffrey J. Folkins , Roger L. Bullock , Thomas J. Fleck , Kenneth W. Pietrowski , Charles H. Tabb , Zhao-Zhi Yu , Mark A. Gwaltney
IPC分类号： G03G15/02 , G03G15/01
CPC分类号： G03G15/0152 , G03G15/0105 , G03G15/0157 , G03G15/0163 , G03G2215/0174
摘要： In a multi-color imaging apparatus utilizing a recharge step between two image creation steps for recharging a charge retentive surface to a predetermined potential pursuant to forming the second of the two images, a first corona generating device recharges the charge retentive surface to a higher absolute potential than a predetermined potential, and then a second corona generating device recharges the charge retentive surface to the predetermined potential. An electrical charge associated with the first image is substantially neutralized after being recharged by the first and second corona generating device.
摘要翻译：在多色成像装置中，利用在两个图像创建步骤之间的再充电步骤，用于通过形成两个图像中的第二个将充电保持表面再次充电到预定电位，第一电晕产生装置将电荷保持表面再充电到更高的绝对值电位超过预定电位，然后第二电晕发生装置将电荷保持表面再充电至预定电位。与第一图像相关联的电荷在被第一和第二电晕产生装置再充电之后基本上被中和。

6. 发明授权

US5867198A Method for estimation of toner usage in digital xerographic copiers and printers 失效
标题翻译：数字静电复印机和打印机中调色剂使用估算方法
公开(公告)号：US5867198A
公开(公告)日：1999-02-02
申请号：US695506
申请日：1996-08-12
申请人： Mark A. Gwaltney , David R. Wyble
发明人： Mark A. Gwaltney , David R. Wyble
IPC分类号： G03G15/00 , G03G15/08 , G03G15/36 , G03G21/00 , H04N1/29 , H04N1/40 , B41J2/385 , G03G13/04
CPC分类号： H04N1/233 , G03G15/0849 , H04N1/295 , G03G15/556
摘要： An improved method for estimating toner usage in digital xerographic printers and copiers. The method is characterized by taking into account digital image dot spreading which results in the area of a pixel not being developed fully and some areas outside of the pixel being developed. Thus, the improved method takes into account the departure of a developed image from an ideal shape (i.e. square). To this end, the improved method compensates for departure of a developed image from an ideal shape. In carrying out the method estimated toner usage is based on pixel groupings rather than simple pixel counting.
摘要翻译：一种用于估计数字静电印刷机和复印机中的调色剂使用的改进方法。该方法的特征在于考虑到数字图像点扩展，这导致像素的面积未被充分发展，并且像素外部的某些区域被显影。因此，改进的方法考虑到显影图像从理想形状（即正方形）的偏离。为此，改进的方法补偿显影图像与理想形状的偏离。在执行方法时，估计的调色剂使用基于像素分组而不是简单的像素计数。

7. 发明授权

US06456394B1 Method for reducing halo print defects associated with color images 有权
标题翻译：减少与彩色图像相关的光晕印刷缺陷的方法
公开(公告)号：US06456394B1
公开(公告)日：2002-09-24
申请号：US09209082
申请日：1998-12-10
申请人： Mark A. Gwaltney , Kevin M. Sheridan
发明人： Mark A. Gwaltney , Kevin M. Sheridan
IPC分类号： G06F1500
CPC分类号： H04N1/58
摘要： A method is disclosed for reducing halo print defects occurring in printed/copied color images. The method includes detecting a boundary between a first image object and a second image object within a color separation of the color document, and modifying the video values of a plurality of pixels within the color separation so that the video values slope toward the boundary, the plurality of pixels being located within a transition zone adjacent the boundary. In the case where toner black is used, the video values of a plurality of pixels within a transition zone of a toner black color separation are modified so that the video values ramp or slope down toward the boundary, and the video values of a plurality of pixels within transition zones of a cyan color separation, a magenta color separation, and a yellow color separation are modified so that the video values ramp or slope up toward the boundary. In effect, the process increasingly replaces toner black with process black (i.e. equal parts of cyan, magenta, and yellow toner particles) in the transition zone in a direction toward the boundary. As a result the electrostatic interactions on the photoreceptor are reduced and halo print defects are eliminated.
摘要翻译：公开了一种用于减少在打印/复制的彩色图像中出现的光晕印刷缺陷的方法。该方法包括检测彩色文档的颜色分离中的第一图像对象和第二图像对象之间的边界，以及修改颜色分离中的多个像素的视频值，使得视频值向边界倾斜，多个像素位于与边界相邻的过渡区域内。在使用调色剂黑色的情况下，修改调色剂黑色分离的过渡区域内的多个像素的视频值，使得视频值向边界斜坡或向下倾斜，并且多个像素的视频值修改青色分离，品红色分离和黄色分离的过渡区域内的像素，使得视频值向边界斜坡或斜坡上升。实际上，该过程在朝向边界的方向上越来越多地用过程黑色（即，青色，品红色和黄色调色剂颗粒的相等部分）替代过渡区域中的调色剂黑色。结果，光感受器上的静电相互作用减少，消除光晕印刷缺陷。

8. 发明授权

US5751432A Highlight gloss for xerographic engine 失效
标题翻译：突出显示静电复印引擎的光泽度
公开(公告)号：US5751432A
公开(公告)日：1998-05-12
申请号：US656516
申请日：1996-05-31
申请人： Mark A. Gwaltney
发明人： Mark A. Gwaltney
IPC分类号： G03G15/01 , G03G8/00 , G03G13/08 , H04N1/29 , H04N1/00 , G03G13/01 , G03G13/20 , G03G21/00
CPC分类号： G03G13/08 , G03G15/6585 , G03G8/00 , H04N1/29 , G03G2215/00805 , G03G2215/0174
摘要： Apparatus and method for glossing certain areas of a substrate. In particular, highlight images are created by incorporating in some of the images on a substrate a clear polymer material thereby providing them with a larger mass thereby resulting in a higher gloss than those images on the same substrate which do not contain the additional clear polymer.
摘要翻译：用于涂覆基材的某些区域的装置和方法。特别地，通过将基底上的一些图像并入透明聚合物材料从而为它们提供更大的质量从而产生比不含另外的透明聚合物的相同基底上的那些图像更高的光泽度来创建高光图像。

9. 发明授权

US5579100A Single positive recharge method and apparatus for color image formation 失效
标题翻译：彩色图像形成的单一正补充方法和装置
公开(公告)号：US5579100A
公开(公告)日：1996-11-26
申请号：US363081
申请日：1994-12-23
申请人： Zhao-Zhi Yu , Charles H. Tabb , John F. O'Brien , James R. Beachner , Mark A. Gwaltney , Meng H. Lean , Jeffrey J. Folkins
发明人： Zhao-Zhi Yu , Charles H. Tabb , John F. O'Brien , James R. Beachner , Mark A. Gwaltney , Meng H. Lean , Jeffrey J. Folkins
IPC分类号： G03G15/02 , G03G15/01
CPC分类号： G03G15/0157 , G03G15/0163 , G03G2215/0174
摘要： In a multi-color imaging apparatus utilizing a recharge step between two image creation steps, a corona generating device is used to recharge the developed image areas and untoned areas of a charge retentive surface to a lower electrical potential than that associated with the developed image areas before recharge, so that the residual voltage associated with the developed image is substantially reduced and a minimal level of negative charge is driven through the toner layer(s). An electrical charge associated with any previously developed images is substantially neutralized prior to development of any subsequent images thereon.
摘要翻译：在利用两个图像创建步骤之间的再充电步骤的多色成像装置中，使用电晕发生装置将电荷保持性表面的显影图像区域和未加压区域再次充电到比显影图像区域相关联的更低的电位在充电之前，使得与显影图像相关联的残余电压被显着地减小，并且通过调色剂层驱动最小的负电荷水平。与任何先前显影的图像相关联的电荷在其上的任何后续图像显影之前被基本上中和。

10. 发明授权

US5559579A Closed-loop developability control in a xerographic copier or printer 失效
标题翻译：静电复印机或打印机中的闭环显影控制
公开(公告)号：US5559579A
公开(公告)日：1996-09-24
申请号：US315018
申请日：1994-09-29
申请人： Mark A. Gwaltney , Robert E. Grace
发明人： Mark A. Gwaltney , Robert E. Grace
IPC分类号： G03G15/00 , G03G15/08 , G03G21/00
CPC分类号： G03G15/0855 , G03G15/5041 , G03G15/556 , G03G2215/00042
摘要： A developer control for enabling the use of developer and toner materials with widely varying At in high quality xerographic copying and printing. Pixel count data is combined with toner test patch reflectance data during a brief toner rundown to determine the rate of change of density per unit change in toner concentration. During toner rundown, dispensing of toner is suspended for a period of time for effecting toner concentration reduction by approximately 0.25%. The change in Toner Concentration (TC) is estimated using pixel counting. Additionally, toner test patches are created and the reflectance thereof is measured for determining the change in toner density. The estimated TC change and the change in toner density are processed using linear regression to find the average change in density sensor output for the estimated change in TC which is referred to as the rundown slope. The rundown slope is then compared to a target value. If it exceeds the target value by more than ? (a noise factor), the dispense setpoint is reduced by one unit. If the rundown slope is less than the target value by more than ?, the dispense point is increased by one unit. The noise factor, ? is attributable to errors in pixel count or reflectance sensor drift. According to the foregoing, the nominal control line and control band in TC-Tribo space is altered to produce a much wider usable At range.
摘要翻译：一种显影剂控制，可以在高质量的静电复印和印刷中使用广泛变化的显影剂和调色剂材料。像素计数数据在短暂的调色剂破碎期间与调色剂测试贴片反射率数据组合，以确定调色剂浓度每单位变化的密度变化率。在调色剂粉碎过程中，调色剂的分配暂停一段时间，以使调色剂浓度降低约0.25％。调色剂浓度（TC）的变化使用像素计数进行估计。此外，产生调色剂测试贴片并测量其反射率以确定调色剂浓度的变化。使用线性回归来处理估计的TC变化和调色剂浓度的变化，以找出被称为下降斜率的TC的估计变化的密度传感器输出的平均变化。然后将衰落斜率与目标值进行比较。如果超过目标值超过？（噪声因子），分配设定点减少一个单位。如果破碎斜率小于目标值大于α，则分配点增加一个单位。噪音因素？可归因于像素计数或反射率传感器漂移的误差。根据上述，TC-Tribo空间中的标称控制线和控制带被改变以产生更广泛的可用At范围。

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