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1. 发明授权

US06351319B1 System and apparatus for single subpixel elimination with local error compensation in an high addressable error diffusion process 有权
公开(公告)号：US06351319B1
公开(公告)日：2002-02-26
申请号：US09216888
申请日：1998-12-18
申请人： Stuart A. Schweid , David J. Metcalfe
发明人： Stuart A. Schweid , David J. Metcalfe
IPC分类号： H04N121
CPC分类号： H04N1/4052
摘要： A system and method for processing image data converts a pixel of image data having a first resolution to a plurality of subpixels, the plurality of subpixels representing a second resolution, the second resolution being higher than the first resolution. The plurality of subpixels are thresholded to generate a group of subpixel values for each pixel and a threshold error value. It is then determined if the group of subpixel values from the thresholding process produce a pattern containing an isolated subpixel. If the group of subpixel values from the thresholding process produce a pattern containing an isolated subpixel, the group of subpixel vales is modified to produce a pattern without an isolated subpixel. The modification process produces a subpixel error value which is compensated for localized error before being diffused to adjacent pixels.

2. 发明申请

US20090003729A1 Fiducial artifact detection and compensation algorithm 有权
标题翻译：基准伪影检测和补偿算法
公开(公告)号：US20090003729A1
公开(公告)日：2009-01-01
申请号：US11823893
申请日：2007-06-29
申请人： David J. Metcalfe , Terri A. Clingerman , Stuart A. Schweid , Howard Mizes
发明人： David J. Metcalfe , Terri A. Clingerman , Stuart A. Schweid , Howard Mizes
IPC分类号： G06K9/36
CPC分类号： H04N1/00002 , H04N1/00005 , H04N1/00015 , H04N1/00023 , H04N1/00031 , H04N1/00045 , H04N1/00053 , H04N1/00063 , H04N1/00068 , H04N1/00087 , H04N1/0009 , H04N1/4015 , H04N1/409
摘要： Defects in an image forming system may give rise to scratched fiducials, missing fiducial regions, or other defects in an image that can run parallel to the process direction. The present disclosure provides for a fiducial compensation method and system for detecting defects thereby allowing spatial tone reproduction curves to be calculated and applied to a digital image in order to eliminate printed streaks due to a photoreceptor's non-uniformities.
摘要翻译：图像形成系统中的缺陷可能会导致划痕的基准，缺失的基准区域或图像中可能平行于过程方向运行的其他缺陷。本公开提供了用于检测缺陷的基准补偿方法和系统，从而允许空间色调再现曲线被计算并应用于数字图像，以便消除由于感光体的不均匀性引起的印刷条纹。

3. 发明授权

US07830554B2 Fiducial artifact detection and compensation algorithm 有权
标题翻译：基准伪影检测和补偿算法
公开(公告)号：US07830554B2
公开(公告)日：2010-11-09
申请号：US11823893
申请日：2007-06-29
申请人： David J. Metcalfe , Terri A. Clingerman , Stuart A. Schweid , Howard Mizes
发明人： David J. Metcalfe , Terri A. Clingerman , Stuart A. Schweid , Howard Mizes
IPC分类号： G06K15/00 , H04N1/405 , H04N1/46
CPC分类号： H04N1/00002 , H04N1/00005 , H04N1/00015 , H04N1/00023 , H04N1/00031 , H04N1/00045 , H04N1/00053 , H04N1/00063 , H04N1/00068 , H04N1/00087 , H04N1/0009 , H04N1/4015 , H04N1/409
摘要： Defects in an image forming system may give rise to scratched fiducials, missing fiducial regions, or other defects in an image that can run parallel to the process direction. The present disclosure provides for a fiducial compensation method and system for detecting defects thereby allowing spatial tone reproduction curves to be calculated and applied to a digital image in order to eliminate printed streaks due to a photoreceptor's non-uniformities.
摘要翻译：图像形成系统中的缺陷可能会导致划痕的基准，缺失的基准区域或图像中可能平行于过程方向运行的其他缺陷。本公开提供了用于检测缺陷的基准补偿方法和系统，从而允许空间色调再现曲线被计算并应用于数字图像，以便消除由于感光体的不均匀性引起的印刷条纹。

4. 发明授权

US06061143A System and apparatus for single subpixel elimination with local error compensation in an high addressable error diffusion process 失效
公开(公告)号：US06061143A
公开(公告)日：2000-05-09
申请号：US62403
申请日：1998-04-20
申请人： Stuart A. Schweid , David J. Metcalfe
发明人： Stuart A. Schweid , David J. Metcalfe
IPC分类号： G06T5/00 , H04N1/405 , G06K15/00
CPC分类号： H04N1/4055 , H04N1/4052
摘要： A system and method for processing image data converts a pixel of image data having a first resolution to a plurality of subpixels, the plurality of subpixels representing a second resolution, the second resolution being higher than the first resolution. The plurality of subpixels are thresholded to generate a group of subpixel values for each pixel and a threshold error value. It is then determined if the group of subpixel values from the thresholding process produce a pattern containing an isolated subpixel. If the group of subpixel values from the thresholding process produce a pattern containing an isolated subpixel, the group of subpixel vales is modified to produce a pattern without an isolated subpixel. The modification process produces a subpixel error value which is compensated for localized error before being diffused to adjacent pixels.

5. 发明授权

US06603575B2 System and apparatus for single subpixel elimination with local error compensation in a high addressable error diffusion process 有权
标题翻译：用于在高可寻址误差扩散过程中采用局部误差补偿的单次子像素消除的系统和装置
公开(公告)号：US06603575B2
公开(公告)日：2003-08-05
申请号：US10046687
申请日：2002-01-16
申请人： Stuart A. Schweid , David J. Metcalfe
发明人： Stuart A. Schweid , David J. Metcalfe
IPC分类号： H04N121
CPC分类号： H04N1/4052
摘要： A system and method for processing image data converts a pixel of image data having a first resolution to a plurality of subpixels, the plurality of subpixels representing a second resolution, the second resolution being higher than the first resolution. The plurality of subpixels are thresholded to generate a group of subpixel values for each pixel and a threshold error value. It is then determined if the group of subpixel values from the thresholding process produce a pattern containing an isolated subpixel. If the group of subpixel values from the thresholding process produce a pattern containing an isolated subpixel, the group of subpixel vales is modified to produce a pattern without an isolated subpixel. The modification process produces a subpixel error value which is compensated for localized error before being diffused to adjacent pixels.
摘要翻译：用于处理图像数据的系统和方法将具有第一分辨率的图像数据的像素转换为多个子像素，所述多个子像素表示第二分辨率，第二分辨率高于第一分辨率。多个子像素被阈值化以产生每个像素的一组子像素值和阈值误差值。然后确定来自阈值处理的子像素值组是否产生包含隔离子像素的图案。如果来自阈值处理的子像素值组产生包含隔离子像素的图案，则子像素值组被修改以产生没有隔离子像素的图案。修改过程产生子像素误差值，其在被扩散到相邻像素之前被补偿了局部误差。

6. 发明授权

US5754706A System and apparatus for single subpixel elimination in an high addressable error diffusion process 失效
标题翻译：在高可寻址误差扩散过程中用于单个子像素消除的系统和装置
公开(公告)号：US5754706A
公开(公告)日：1998-05-19
申请号：US666770
申请日：1996-06-19
申请人： Stuart A. Schweid , David J. Metcalfe
发明人： Stuart A. Schweid , David J. Metcalfe
IPC分类号： B41J2/52 , G06T3/40 , G06T5/00 , H04N1/405 , H04N1/409 , G06K9/36
CPC分类号： G06T3/4007 , H04N1/4052
摘要： A system and method for processing image data converts a pixel of image data having a first resolution to a plurality of subpixels, the plurality of subpixels representing a second resolution, the second resolution being higher than the first resolution. The plurality of subpixels are thresholded to generate a group of subpixel values for each pixel and a threshold error value. It is then determined if the group of subpixel values from the thresholding process produce a pattern containing an isolated subpixel. If the group of subpixel values from the thresholding process produce a pattern containing an isolated subpixel, the group of subpixel vales is modified to produce a pattern without an isolated subpixel. The modification process produces a subpixel error value which is diffused in the slowscan direction to adjacent pixels.
摘要翻译：用于处理图像数据的系统和方法将具有第一分辨率的图像数据的像素转换为多个子像素，所述多个子像素表示第二分辨率，第二分辨率高于第一分辨率。多个子像素被阈值化以产生每个像素的一组子像素值和阈值误差值。然后确定来自阈值处理的子像素值组是否产生包含隔离子像素的图案。如果来自阈值处理的子像素值组产生包含隔离子像素的图案，则子像素值组被修改以产生没有隔离子像素的图案。修改处理产生在慢扫描方向上扩散到相邻像素的子像素误差值。

7. 发明授权

US08117134B2 Neutral pixel correction for proper marked color printing 有权
标题翻译：中性像素校正，用于正确标记彩色打印
公开(公告)号：US08117134B2
公开(公告)日：2012-02-14
申请号：US12252391
申请日：2008-10-16
申请人： James B. Campbell , Francis Kapo Tse , Xing Li , David J. Metcalfe
发明人： James B. Campbell , Francis Kapo Tse , Xing Li , David J. Metcalfe
IPC分类号： G06F17/00 , G06F3/12
CPC分类号： H04N1/403 , G06Q30/0283 , H04N1/56
摘要： A system calculates appropriate billing within an imaging pipeline. An input component receives an image that is described as a plurality of pixels. A PDL component receives the image and determines a location, a color and a designation for each of the one or more pixels. A marking engine modifies the one or more pixels based at least in part on the location and the color provided by the PDL component and places each of the one or more pixels as a monochrome or a composite pixel on a substrate. An analysis component counts the number of monochrome and composite pixels placed on the substrate by the marking engine, the number of composite pixels that include a designation are counted as monochrome. A billing component calculates the cost for placing each of the monochrome and the composite pixels counted by the analysis component.
摘要翻译：系统在成像流水线内计算适当的计费。输入部件接收被描述为多个像素的图像。 PDL组件接收图像并且确定一个或多个像素中的每一个的位置，颜色和指定。标记引擎至少部分地基于由PDL组件提供的位置和颜色来修改一个或多个像素，并且将一个或多个像素中的每一个作为单色或复合像素放置在衬底上。分析组件通过标记引擎计算放置在衬底上的单色和复合像素的数量，包括指定的复合像素的数量被计为单色。计费组件计算放置由分析组件计数的单色和复合像素中的每一个的成本。

8. 发明授权

US06449061B2 System and method for providing dynamic noise profile selection for hybrid and error diffusion image processing 失效
标题翻译：为混合和误差扩散图像处理提供动态噪声分布选择的系统和方法
公开(公告)号：US06449061B2
公开(公告)日：2002-09-10
申请号：US09062404
申请日：1998-04-20
申请人： David J. Metcalfe
发明人： David J. Metcalfe
IPC分类号： G06K1502
CPC分类号： H04N1/4053
摘要： A process eliminates pattern shifting artifacts in a printed image rendered using a hybrid high addressable error diffusion process by perturbing a threshold/image signal value relationship when a multi-level grey level is binarized. The process utilizes a programmable multi-level grey signal modifying circuit for modifying the multi-level grey signal by a predetermined value according to its grey level. The modified multi-level grey signal is binarized to a binary pixel signal according to a relationship between the modified multi-level grey signal and a threshold value. The process further generates an error corresponding to the relationship and diffuses the error to neighboring pixels. The multi-level grey signal is modified with either random noise multiplied by a grey level dependent coefficient value. The coefficient value is dependent upon an image classification of the pixel being processed.
摘要翻译：当多级灰度级被二值化时，处理消除了使用混合高可寻址误差扩散处理所形成的打印图像中的图案移位伪像，该方法通过扰乱阈值/图像信号值关系。该过程利用可编程多级灰度信号修正电路，根据其灰度级将多级灰度信号修正预定值。修改后的多级灰度信号根据修改的多级灰度信号与阈值之间的关系被二值化为二进制像素信号。该过程进一步产生与该关系对应的错误，并将误差扩散到相邻像素。多级灰度信号用随机噪声乘以灰度级依赖系数值进行修改。系数值取决于正在处理的像素的图像分类。

9. 发明授权

US06427030B1 Method and system for image conversion utilizing dynamic error diffusion 失效
标题翻译：利用动态误差扩散进行图像转换的方法和系统
公开(公告)号：US06427030B1
公开(公告)日：2002-07-30
申请号：US08285324
申请日：1994-08-03
申请人： Leon C. Williams , Jeng-Nan Shiau , David J. Metcalfe
发明人： Leon C. Williams , Jeng-Nan Shiau , David J. Metcalfe
IPC分类号： G06K946
CPC分类号： H04N1/4053
摘要： A method and system implements a dynamic error diffusion process. A grey level value representing a pixel is received. An image segmentation circuit determines an image characteristic of the pixel being processed. A threshold circuit thresholds the grey level value (pixel) and generates an error value as a result of the threshold process. A portion of the error value is diffused to adjacent pixels on a next scanline. The distribution of this error value is dynamic in that different sets of weighting coefficients are used based the image characteristic of the processed pixel. One set of coefficients are utilized in processing a pixel having a first image characteristic, and a second set of coefficients are utilized in processing a pixel having a second image characteristic.
摘要翻译：一种方法和系统实现了动态误差扩散过程。接收表示像素的灰度值。图像分割电路确定正在处理的像素的图像特性。阈值电路对灰度值（像素）进行阈值，并作为阈值处理的结果产生误差值。错误值的一部分扩散到下一个扫描线上的相邻像素。基于经处理的像素的图像特性，使用不同的加权系数集合，该误差值的分布是动态的。一组系数用于处理具有第一图像特性的像素，并且第二组系数被用于处理具有第二图像特性的像素。

10. 发明授权

US5787206A Method and system for processing image information using expanded dynamic screening and error diffusion 失效
标题翻译：使用扩展动态筛选和误差扩散处理图像信息的方法和系统
公开(公告)号：US5787206A
公开(公告)日：1998-07-28
申请号：US655422
申请日：1996-05-30
申请人： Leon C. Williams , Jeng-Nan Shiau , David J. Metcalfe
发明人： Leon C. Williams , Jeng-Nan Shiau , David J. Metcalfe
IPC分类号： B41J2/52 , G06T5/00 , H04N1/405
CPC分类号： H04N1/4053
摘要： A printing system for rendering marks on a recording medium receives a multi-level grey scale pixel value representing a pixel having a first resolution. A screening circuit generates a screened multi-level grey scale pixel value equal to (G.sub.L -V.sub.i)+(S.sub.i -Th)*Dmp.sub.vi *Mod.sub.Eff wherein G.sub.L is the maximum grey level value of the pixel, V.sub.i is equal to the multi-level grey scale pixel value of the first resolution, S.sub.i is equal to a screen value corresponding to a position of the pixel, Th is the threshold value, Dmp.sub.vi is a video dependent dampening factor, and Mod.sub.Eff is a modulation multiplication factor. An interpolator converts the screened multi-level grey scale pixel value to a second resolution, the second resolution being higher than the first resolution, and a binarization circuit binarizes the converted multi-level grey scale pixel value so as to output a binary signal and an error value, the error value having a resolution equal to the first resolution. The error value is diffused to multi-level grey scale pixel values corresponding to pixels adjacent to the pixel having the first resolution, and the binary signal is converted into a mark on the recording medium.
摘要翻译：用于在记录介质上渲染标记的打印系统接收表示具有第一分辨率的像素的多级灰度像素值。筛选电路产生等于（GL-Vi）+（Si-Th）* Dmpvi * ModEff的屏蔽多级灰度像素值，其中GL是像素的最大灰度级值，Vi等于多级第一分辨率的灰阶像素值，Si等于与像素的位置对应的屏幕值，Th是阈值，Dmpvi是视频相关的衰减因子，ModEff是调制倍增因子。内插器将所筛选的多级灰阶像素值转换为第二分辨率，第二分辨率高于第一分辨率，二值化电路对转换后的多级灰阶像素值进行二值化处理，以输出二进制信号和误差值，误差值具有等于第一分辨率的分辨率。误差值扩散到与具有第一分辨率的像素相邻的像素对应的多级灰度像素值，并且二进制信号被转换成记录介质上的标记。

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