公开(公告)号：US20060109522A1

公开(公告)日：2006-05-25

申请号：US10992865

申请日：2004-11-19

申请人： Shen-Ge Wang

发明人： Shen-Ge Wang

IPC分类号： H04N1/38

CPC分类号： H04N1/4097

摘要： Disclosed is a method to detect streaks in the scanned documents. The principle of this method is that the profiles of streaks change very little from line to line, while profiles of other thin lines, as content of scanned documents, usually vary in a degree. Therefore, each scan-line can be searched for streak profiles. Once such a profile is detected, it is compared with a profile stored in a buffer, which represents a dynamic average of previously recorded scan-lines. If a stable streak profile is detected and lasted for a certain length, say one inch, the streak alarm can be turned on and a corresponding correction process can be applied for streak removal. With a limited buffer increase and without any major hardware modification, the proposed method can detect occurrence of streaks at run time of the scanning process.

摘要翻译： 公开了一种检测扫描文档中的条纹的方法。 这种方法的原理是，条纹的轮廓从一行到另一方变化很小，而作为扫描文档的内容的其他细线的轮廓通常在一定程度上变化。 因此，可以搜索每条扫描线的条纹轮廓。 一旦检测到这样的轮廓，就将其与存储在缓冲器中的轮廓进行比较，这表示先前记录的扫描线的动态平均值。 如果检测到稳定的条纹轮廓并持续一定长度，例如一英寸，则可以打开条纹报警，并且可以应用相应的校正过程来进行条纹去除。 在缓冲区有限的情况下，没有任何主要的硬件修改，所提出的方法可以检测扫描过程运行时的条纹发生。

公开(公告)号：US20060087665A1

公开(公告)日：2006-04-27

申请号：US10972357

申请日：2004-10-26

申请人： Shen-Ge Wang

发明人： Shen-Ge Wang

IPC分类号： H04N1/60

CPC分类号： H04N1/6019

摘要： Various implementations of this invention provide a method of color transformation of image data that included: providing at least two units, each unit comprising a combination of a plurality of look-up tables and a M×N matrix; providing image data configured in a first color space; processing the image data using a first unit to generate an output; and processing the generated output using a second unit to generate a second output; wherein the plurality of look-up tables are used to transform an input color space to a device dependent color space, and the M×N matrix is used to perform one of at least converting color data defined in standard space to data defined in XYZ space and converting image data defined in XYZ space to image data defined in LAB space.

公开(公告)号：US08477374B2

公开(公告)日：2013-07-02

申请号：US12894475

申请日：2010-09-30

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

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

IPC分类号： H04N1/60

CPC分类号： H04N1/6033

摘要： Systems and methods are described that facilitate reducing a number of patches used in characterizing a color halftone printer via a binary color printer model. A binary printer model involves printing of a fundamental set of color binary patterns that encompass all possible halftone outputs. A k-center clustering technique is employed to automatically find and eliminate redundancies in the initial set of binary color patterns. Once the number of patches is reduced to an acceptable number, a multiplicative reflectance model is applied that better approximates the physical process and therefore improves accuracy.

摘要翻译： 描述了有助于通过二进制彩色打印机模型减少用于表征彩色半色调打印机的多个补丁的系统和方法。 二进制打印机模型涉及打印包含所有可能的半色调输出的基本颜色二进制图案集。 采用k-中心聚类技术来自动寻找和消除初始二值颜色图案集中的冗余。 一旦将补片的数量减少到可接受的数量，则应用更好地逼近物理过程并因此提高准确度的乘法反射率模型。

公开(公告)号：US08107099B2

公开(公告)日：2012-01-31

申请号：US11166298

申请日：2005-06-24

申请人： Robert P. Loce ,  Shen-Ge Wang

发明人： Robert P. Loce ,  Shen-Ge Wang

IPC分类号： H04N1/40

CPC分类号： H04N1/32251 ,  B41M3/14 ,  H04N1/32203 ,  H04N1/32208 ,  H04N1/32229 ,  H04N1/32304 ,  H04N1/3232 ,  H04N1/32325

摘要： A watermark is provided for use with images or image portions, such as saturated text. The watermark is provided as a modulation to the optical density of a public image or image portion wherein both modulated and unmodulated portions of the public image or image portion have an optical density that is beyond a threshold optical density beyond which the human visual system has a low sensitivity to optical density variations. Alternatively, the modulation is made at such a low amplitude as to be difficult to perceive by the human visual system. The modulation may be applied via an overprinting operation. Alternatively the modulation may be applied to image data prior to printing.

摘要翻译： 提供水印以用于图像或图像部分，例如饱和文本。 提供水印作为对公众图像或图像部分的光密度的调制，其中公共图像或图像部分的调制和未调制部分都具有超过阈值光密度的光密度，超过该阈值的人视觉系统具有 对光密度变化的敏感度低。 或者，以如此低的幅度进行调制，使其难以被人类视觉系统察觉。 可以通过套印操作来应用调制。 或者，可以在打印之前将调制应用于图像数据。

公开(公告)号：US20100091334A1

公开(公告)日：2010-04-15

申请号：US12251808

申请日：2008-10-15

申请人： Mu Qiao ,  Robert P. Loce ,  Shen-Ge Wang ,  Daniel W. Costanza ,  Rakesh S. Kulkarni

发明人： Mu Qiao ,  Robert P. Loce ,  Shen-Ge Wang ,  Daniel W. Costanza ,  Rakesh S. Kulkarni

IPC分类号： H04N1/407 ,  G03G15/00

CPC分类号： H04N1/407 ,  G03G15/5062 ,  G03G2215/0161

摘要： A digital image processing method. The method includes printing a first set of reference marks on one side of a substrate with a first print engine; printing a second set of reference marks on the same side of the substrate as the first set of reference marks with a second print engine; sensing both sets of reference marks on the substrate with an image sensing unit and generating a digital image of the reference marks; performing image analysis on the digital image to obtain an image-to-image distortion map where the image-to-image distortion map is a local measure of difference between the first set of reference marks and the second set of reference marks; and generating a compensated customer image by using the image-to-image distortion map to reduce registration errors when using the first and second print engines.

摘要翻译： 数字图像处理方法。 该方法包括用第一印刷引擎在基板的一侧上印刷第一组参考标记; 使用第二打印引擎在与所述第一组参考标记的所述基板的相同侧上打印第二组参考标记; 用图像感测单元感测基板上的两组参考标记，并产生参考标记的数字图像; 对数字图像执行图像分析以获得图像到图像失真图，其中图像到图像失真图是第一组参考标记和第二组参考标记之间的差的局部度量; 以及通过使用图像到图像失真图来生成补偿的客户图像，以减少当使用第一和第二打印引擎时的注册错误。

公开(公告)号：US20100079813A1

公开(公告)日：2010-04-01

申请号：US12242222

申请日：2008-09-30

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

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

IPC分类号： H04N1/405

CPC分类号： H04N1/52 ,  H04N1/393 ,  H04N1/40075

摘要： As provided herein, there are supplied teachings to systems and methods for resizing a digital uniform rosette halftone image composed of multiple colorant separations, by using uniform rosette halftone tile parameters and iterative determination of energy metrics. One approach entails receiving into a digital imaging system, a digital uniform rosette halftone image and a desired resizing factor for that digital uniform rosette halftone image. Subsequently the system will define uniform rosette screen parameters to define uniform rosette Holladay halftone tiles within the color uniform rosette digital halftone image. From the defined uniform rosette cells, a number of uniform rosette halftone tile seams are determined for manipulation. The orientation of the number of uniform rosette halftone tile seams is dictated by the received desired resizing factor. The energy of the number of uniform rosette halftone tile seams is determined according to an energy metric so as to provide indication of low energy determined uniform rosette halftone tile seams. A resizing of the uniform rosette halftone image by iteratively deleting a number of the low energy determined uniform rosette halftone tile seam is performed so as to obtain a resized uniform rosette halftone image. The resized uniform rosette halftone image may then be printed on a printer.

摘要翻译： 如本文所提供的，提供了用于通过使用均匀的玫瑰花半色调瓦片参数和能量度量的迭代确定来调整由多个着色剂分离组成的数字均匀玫瑰花半色调图像的系统和方法的教导。 一种方法需要接收数字成像系统，数字均匀花莲半色调图像和用于该数字均匀花莲半色调图像的期望的调整大小因子。 随后，系统将定义均匀的玫瑰花屏幕参数，以在彩色均匀玫瑰花数字半色调图像内定义均匀的玫瑰花Holladay半色调瓷砖。 从定义的均匀花环细胞中，确定了许多均匀的玫瑰花半色调瓷砖接缝用于操纵。 均匀玫瑰状半色调瓷砖接缝数量的取向由接收到的所需调整尺寸系数决定。 根据能量度量确定均匀玫瑰状半色调瓷砖接缝数量的能量，以提供低能量确定的均匀玫瑰花半色调瓷砖接缝的指示。 通过迭代地删除多个低能量确定的均匀玫瑰花结半色调瓦片接缝来调整均匀玫瑰状半色调图像的大小，以获得调整大小的均匀玫瑰花半色调图像。 然后可以在打印机上打印调整大小的均匀花莲半色调图像。

公开(公告)号：US20090180152A1

公开(公告)日：2009-07-16

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： H04K1/00 ,  G06K9/00

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：US07433539B2

公开(公告)日：2008-10-07

申请号：US10993852

申请日：2004-11-19

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

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

IPC分类号： G06K9/40 ,  G06K9/32

CPC分类号： H04N1/4097

摘要： A method for run-time streak removal from a scanned image includes providing a scan line of image data from the scanned image; detecting corrupted data within the scan line; evaluating image data located in a neighborhood before and after the corrupted data on the scan line; if the evaluated image data in the neighborhood is smooth, replacing the corrupted data with image data determined by a linear interpolation process; and else if the evaluated image data in the neighborhood is not smooth, replacing the corrupted data with image data determined by the linear prediction process. Various techniques can be used to evaluate the image data located in the surrounding neighborhood. For example, a filter selection step may be used based on prediction discrepancies.

摘要翻译： 从扫描图像中去除运行时间条纹的方法包括从扫描图像提供图像数据的扫描线; 检测扫描线内的损坏的数据; 评估位于扫描线上的损坏数据之前和之后的邻域中的图像数据; 如果附近的评估图像数据平滑，则用由线性内插处理确定的图像数据替换损坏的数据; 否则如果附近的评估图像数据不平滑，则用由线性预测处理确定的图像数据替换损坏的数据。 可以使用各种技术来评估位于周边地区的图像数据。 例如，可以基于预测差异来使用滤波器选择步骤。

公开(公告)号：US07391537B2

公开(公告)日：2008-06-24

申请号：US10952413

申请日：2004-09-28

申请人： Reiner Eschbach ,  Shen-Ge Wang ,  William A. Fuss

发明人： Reiner Eschbach ,  Shen-Ge Wang ,  William A. Fuss

IPC分类号： H04N1/405 ,  H04N1/387 ,  B41M3/10 ,  G06K15/14 ,  G06F3/048

CPC分类号： H04N1/4058 ,  H04N1/00838 ,  H04N1/00883 ,  H04N1/54

摘要： The present disclosure relates to providing a user interface for the effective generation of differential gloss images. The user is instructed to indicate the base primary image data, and the desired gloss image data. This data may be displayed for verification and position adjustment by superimposition of the gloss image data upon the base image data. In an alternative, the placement information may be inferred from the position of originals upon the scanner or copier platen and the result may or may not be displayed. By selectively applying halftones with different anisotropic structure orientation characteristics to the base primary image data as directed by the desired gloss image data, a differential gloss image file or hardcopy may be provided.

摘要翻译： 本公开涉及提供用于有效产生差异光泽图像的用户界面。 指示用户指示基本主要图像数据和所需的光泽图像数据。 可以通过将光泽图像数据叠加在基本图像数据上来显示该数据以进行验证和位置调整。 或者，可以从扫描仪或复印机台板上的原稿的位置推断放置信息，并且可以显示或不显示结果。 通过按照期望的光泽图像数据的指示，将具有不同各向异性结构取向特性的半色调选择性地应用于基本主图像数据，可以提供差异光泽图像文件或硬拷贝。

公开(公告)号：US20080019559A1

公开(公告)日：2008-01-24

申请号：US11490565

申请日：2006-07-21

申请人： Shen-Ge Wang ,  Reiner Eschbach

发明人： Shen-Ge Wang ,  Reiner Eschbach

IPC分类号： G06K9/00

CPC分类号： H04N1/32203 ,  H04N1/32229 ,  H04N1/32256

摘要： A method of embedding digital watermarks such as logos, letters or other types of user information into printed documents using different halftone textures. By alternating different halftone methods, such as different halftone screens or different error diffusion algorithms during the halftoning process, digital watermarks can be embedded into the input images at run time. The actual watermark is created by changing—on a pixel basis—the halftoning algorithm that is used in rendering the input image. No modifications to the input image are needed and the image data is reproduced correctly, but with a visible seem between different halftoning techniques.

摘要翻译： 使用不同的半色调纹理将诸如标志，字母或其他类型的用户信息的数字水印嵌入到打印文档中的方法。 通过在半色调处理期间交替使用不同的半色调方法，例如不同的半色调屏幕或不同的误差扩散算法，可以在运行时将数字水印嵌入到输入图像中。 实际的水印是通过基于像素的改变创建的 - 这是用于渲染输入图像的半色调算法。 不需要对输入图像进行修改，并且图像数据被正确地再现，但是在不同的半色调技术之间可见。