公开(公告)号：US20130163053A1

公开(公告)日：2013-06-27

申请号：US13334482

申请日：2011-12-22

申请人： Shen-ge Wang ,  Edgar A. Bernal ,  Robert P. Loce

发明人： Shen-ge Wang ,  Edgar A. Bernal ,  Robert P. Loce

IPC分类号： H04N1/405

CPC分类号： H04N1/4051 ,  H04N1/52

摘要： As set forth herein, computer-implemented methods and systems facilitate employing a single stochastic screen defined up to a specified transition level. The dots at the specified level are connected to form a triangle tessellation with an associated spot function. For up to three colorants, a vector screening technique is employed, which involves a first colorant dot being grown from the vertices, second colorant dot grown from the triangle center, and a third colorant dot grown from the side midpoints. Growth in this manner ensures separation of colorants up to a certain density level. In cases where fourth colorant is to be used at a given pixel, the fourth colorant can be added using methods typically used for clustered screens, such as stochastic screening of the lightest colorant, in order to mitigate color shift sensitivity issues.

摘要翻译： 如本文所述，计算机实现的方法和系统便于采用在特定过渡级别之下定义的单个随机屏幕。 指定级别的点被连接以形成具有相关联的点功能的三角形细分。 对于最多三种着色剂，使用载体筛选技术，其包括从顶点生长的第一着色剂点，从三角形中心生长的第二着色剂点和从侧面中点生长的第三着色剂点。 以这种方式生长确保着色剂的分离达到一定的密度水平。 在给定像素处使用第四着色剂的情况下，可以使用通常用于聚类屏幕的方法（例如最轻的着色剂的随机筛选）来添加第四着色剂，以减轻色移敏感性问题。

公开(公告)号：US08467099B2

公开(公告)日：2013-06-18

申请号：US13108235

申请日：2011-05-16

申请人： Shen-ge Wang ,  Edgar A. Bernal ,  Robert P. Loce ,  Zhigang Fan

发明人： Shen-ge Wang ,  Edgar A. Bernal ,  Robert P. Loce ,  Zhigang Fan

IPC分类号： H04N1/405

CPC分类号： H04N1/4051 ,  H04N1/4092

摘要： As set forth herein, computer-implemented methods and systems facilitate halftoning by adapting 2nd generation halftone techniques to the spatial frequency content of an image utilizing a spot function introduced in conjunction with a technique for determining seed locations, which results in halftone images exhibiting improved edge and detail rendition. A dominant orientation of pixels in an input image is employed to select a pre-generated stochastic screen used to determine the seed locations.

摘要翻译： 如本文所述，计算机实现的方法和系统通过使用结合用于确定种子位置的技术引入的斑点函数使第二代半色调技术适应于图像的空间频率内容来促进半色调，这导致半色调图像表现出改善的边缘 和细节再现。 采用输入图像中的像素的主要取向来选择用于确定种子位置的预先生成的随机屏幕。

公开(公告)号：US08416458B2

公开(公告)日：2013-04-09

申请号：US12612197

申请日：2009-11-04

申请人： Shen-ge Wang ,  Robert P. Loce

发明人： Shen-ge Wang ,  Robert P. Loce

IPC分类号： H04N1/405

CPC分类号： H04N1/52

摘要： Disclosed are methods and apparatus for reproducing an image using one or more halftone screens for one or more respective colorants in the methods and apparatus reducing the beating of one or more excitation frequencies with one or more harmonic frequencies associated with the halftone screens. According to an exemplary method, one or more halftone screens are selected such that the fundamental frequency of an excitation frequency coincides with a harmonic frequency of a halftone screen.

摘要翻译： 公开的方法和装置在方法和装置中使用一个或多个相应着色剂的一个或多个半色调筛网再现图像，以减少一个或多个激励频率与一个或多个与半色调网络相关联的谐波频率的跳动。 根据示例性方法，选择一个或多个半色调屏幕，使得激励频率的基频与半色调屏幕的谐波频率一致。

公开(公告)号：US20120024953A1

公开(公告)日：2012-02-02

申请号：US13238377

申请日：2011-09-21

申请人： Zhigang Fan ,  Reiner Eschbach ,  Calvin John Marlett ,  William A. Fuss ,  James R. Low ,  Shen-ge Wang

发明人： Zhigang Fan ,  Reiner Eschbach ,  Calvin John Marlett ,  William A. Fuss ,  James R. Low ,  Shen-ge Wang

IPC分类号： G06K19/06 ,  G06K7/10

CPC分类号： B42D25/305 ,  B42D15/0073 ,  B42D25/21 ,  B42D25/29 ,  B42D2035/02 ,  B42D2035/50

摘要： A system for generating a security mark includes a data reception component that receives information. A security mark generation component in communication with the data reception component generates at least one security mark configuration based at least in part upon the received information. The at least one security mark configuration includes at least one simulation mark which resembles a natural feature. An application component applies one configuration of the at least one security mark configurations to a recipient. The applied security mark configuration obeys at least one rule whereby the security mark is distinguishable from the natural feature which it resembles by a system for detection of security marks.

摘要翻译： 用于生成安全标记的系统包括接收信息的数据接收部件。 与数据接收组件通信的安全标记生成组件至少部分地基于所接收的信息来生成至少一个安全标记配置。 所述至少一个安全标记配置包括至少一个类似于自然特征的模拟标记。 应用组件将至少一个安全标记配置的一个配置应用于接收者。 应用的安全标记配置遵循至少一个规则，其中安全标记与其由用于检测安全标记的系统类似的自然特征区分开。

公开(公告)号：US08090141B2

公开(公告)日：2012-01-03

申请号：US11343668

申请日：2006-01-31

申请人： Reiner Eschbach ,  Shen-ge Wang ,  Zhigang Fan

发明人： Reiner Eschbach ,  Shen-ge Wang ,  Zhigang Fan

IPC分类号： G06K9/00 ,  H04N1/40 ,  G09C3/00

CPC分类号： H04N1/32331 ,  G06T1/0028 ,  G06T7/73 ,  G06T2201/0051 ,  G06T2201/0061 ,  H04N1/32187 ,  H04N1/32325

摘要： A system and method are disclosed for determining preferred image locations for placing watermark information (both hidden and obvious). The disclosure includes at least three criteria (image similarity, contrast, and image value range) that may be used alone or in combination to determine a preferred area of the target image for placing the watermark depending upon the user's intent for the mark (hiding or showing watermark).

摘要翻译： 公开了用于确定用于放置水印信息（隐藏和明显）的优选图像位置的系统和方法。 本公开包括至少三个标准（图像相似性，对比度和图像值范围），其可以单独使用或组合使用，以根据用户对标记的意图来确定用于放置水印的目标图像的优选区域（隐藏或 显示水印）。

公开(公告)号：US20110102847A1

公开(公告)日：2011-05-05

申请号：US12612197

申请日：2009-11-04

申请人： Shen-ge Wang ,  Robert P. Loce

发明人： Shen-ge Wang ,  Robert P. Loce

IPC分类号： H04N1/405

CPC分类号： H04N1/52

摘要： Disclosed are methods and apparatus for reproducing an image using one or more halftone screens for one or more respective colorants in the methods and apparatus reducing the beating of one or more excitation frequencies with one or more harmonic frequencies associated with the halftone screens. According to an exemplary method, one or more halftone screens are selected such that the fundamental frequency of an excitation frequency coincides with a harmonic frequency of a halftone screen.

摘要翻译： 公开的方法和装置在方法和装置中使用一个或多个相应着色剂的一个或多个半色调网版再现图像，以减少一个或多个激励频率与一个或多个与半色调网屏相关联的谐波频率的跳动。 根据示例性方法，选择一个或多个半色调屏幕，使得激励频率的基频与半色调屏幕的谐波频率一致。

公开(公告)号：US07903291B2

公开(公告)日：2011-03-08

申请号：US12013664

申请日：2008-01-14

申请人： Raja Bala ,  Shen-ge Wang ,  Reiner Eschbach

发明人： Raja Bala ,  Shen-ge Wang ,  Reiner Eschbach

IPC分类号： H04N1/52 ,  B41M3/10 ,  B42D15/00

CPC分类号： H04N1/44 ,  H04N1/387 ,  H04N1/405 ,  H04N1/4055 ,  H04N1/52

摘要： A method for encryption of a digital watermark by intelligent halftoning includes receiving image data that define at least a portion of a document to be printed in terms of at least three halftone images corresponding respectively to three printing colorants, each of the three halftone images comprising a plurality of halftone cells. The image data are modified by phase-shifting some of the halftone cells of at least one of the halftone images relative to the other halftone images to encode a watermark within the portion of the document such that the at least one phase-shifted halftone image includes a phase-shifted region and a non-phase-shifted region. The modified image data are used to print the portion of the document on a substrate that will fluoresce when subjected to UV illumination. The printed portion of the document includes a first printed pattern resulting from the phase-shifted region and a second printed pattern resulting from the non-phase-shifted region. The first and second patterns of the printed portion of the document appear substantially similar when the portion of the document is viewed in visible light, and appear dissimilar when the portion of the document is viewed in UV light such that the watermark encoded in the modified image data is perceptible when the portion of the document is viewed in UV light and is hidden when the portion of the document is viewed in visible light.

摘要翻译： 通过智能半色调对数字水印进行加密的方法包括接收图像数据，该图像数据限定要分别对应于三个打印着色剂的至少三个半色调图像要打印的文档的至少一部分，三个半色调图像中的每一个包括一个 多个半色调细胞。 图像数据通过相对于其他半色调图像相移至少一个半色调图像的半色调单元来对文档的该部分内的水印进行相位改变，使得至少一个相移半色调图像包括 相移区域和非相移区域。 经修改的图像数据用于将文档的部分打印在经受UV照射时将发荧光的基底上。 文档的打印部分包括由相移区域产生的第一印刷图案和由非相移区域产生的第二印刷图案。 当文件的部分在可见光中观看时，文档的打印部分的第一和第二图案看起来基本相似，并且当在UV光中观看文档的部分时，显示不相似，使得编码在修改图像中的水印 当文档的部分在紫外光下观看时，数据是可感知的，并且当在可见光中观看文档的部分时，数据被隐藏。

公开(公告)号：US20100182616A1

公开(公告)日：2010-07-22

申请号：US12355450

申请日：2009-01-16

申请人： Vishal Monga ,  Shen-ge Wang

发明人： Vishal Monga ,  Shen-ge Wang

IPC分类号： H04N1/405

CPC分类号： H04N1/4078 ,  H04N1/40006

摘要： Disclosed are systems and methods for halftone independent temporal color drift correction, particularly for correction in hi-addressability xerographic printers

摘要翻译： 公开了用于半色调独立的时间色彩漂移校正的系统和方法，特别是用于在高可寻址性静电印刷机中的校正

公开(公告)号：US07724406B2

公开(公告)日：2010-05-25

申请号：US11343656

申请日：2006-01-31

申请人： Shen-ge Wang ,  Raja Bala ,  Vishal Monga

发明人： Shen-ge Wang ,  Raja Bala ,  Vishal Monga

IPC分类号： H04N1/60

CPC分类号： H04N1/4078 ,  H04N1/40006

摘要： A method for compensating for color drift in a printer includes determining a first true tone response curve for a color channel when said printer is in a first state. A first estimated tone response curve for the color channel is also determined when said printer is in the first state. A second estimated tone response curve for the color channel is determined when the printer is in a second, color-drifted state relative to the first state. A second true tone response curve for the color channel is mathematically predicted using the first true tone response curve, the first estimated tone response curve, and the second estimated tone response curve. The first and second estimated tone response curves are estimated using a 2×2 printer model. A printing apparatus includes an image processing unit for implementing the color-drift correction process.

摘要翻译： 用于补偿打印机中的颜色漂移的方法包括当所述打印机处于第一状态时，确定用于颜色通道的第一真实色调响应曲线。 当所述打印机处于第一状态时，还确定色彩通道的第一估计色调响应曲线。 当打印机处于相对于第一状态的第二颜色漂移状态时，确定用于颜色通道的第二估计色调响应曲线。 使用第一真实色调响应曲线，第一估计色调响应曲线和第二估计色调响应曲线来数学地预测用于色彩通道的第二真正色调响应曲线。 使用2×2打印机模型估计第一和第二估计音响响应曲线。 打印装置包括用于实现色差校正处理的图像处理单元。

公开(公告)号：US20090060262A1

公开(公告)日：2009-03-05

申请号：US11897826

申请日：2007-08-31

申请人： Shen-ge Wang

发明人： Shen-ge Wang

IPC分类号： G06K9/00

CPC分类号： H04N1/32309 ,  H04N1/32208 ,  H04N1/32256 ,  H04N1/32304 ,  H04N2201/3233 ,  H04N2201/327

摘要： Disclosed are systems and methods directed to the generation of multi-layer digital watermarks, including the generation of distinct watermarks on each of at least two color layers or channels within an image such that each may be retrieved or viewed independently of the other in the output image.

摘要翻译： 公开了涉及生成多层数字水印的系统和方法，包括在图像中的至少两个颜色层或通道中的每一个上生成不同的水印，使得每个可以在输出中独立于另一个被检索或观看 图片。