公开(公告)号：US08467592B2

公开(公告)日：2013-06-18

申请号：US12655216

申请日：2009-12-23

申请人： Shen-ge Wang ,  Beilei Xu ,  Robert P. Loce

发明人： Shen-ge Wang ,  Beilei Xu ,  Robert P. Loce

IPC分类号： G06K9/00

CPC分类号： G06T7/001 ,  G06T2207/10008 ,  G06T2207/30144

摘要： Embodiments described herein are directed to detecting and/or measuring distortions of substrate media that can occur during a printing process. The distortion can be detected and/or measured using a composite image generated from a reference image having a first periodic pattern and print image, disposed on a test substrate media, having a second periodic pattern. The first and second periodic patterns are specified so that the composite image includes a moiré pattern having moiré fringes resulting from interference between the first periodic pattern associated with the reference image and the second periodic pattern associated with the print image. The moiré fringes can be used to detect and calculate an amount of distortion of the test substrate media.

摘要翻译： 本文描述的实施例涉及检测和/或测量可能在印刷过程中发生的基底介质的变形。 可以使用从具有第二周期性图案的设置在测试基板介质上的具有第一周期图案和打印图像的参考图像生成的合成图像来检测和/或测量失真。 指定第一和第二周期性图案，使得合成图像包括具有由与参考图像相关联的第一周期性图案与与打印图像相关联的第二周期性图案之间的干涉而产生的莫尔条纹的莫尔图案。 莫尔条纹可用于检测和计算测试基板介质的变形量。

公开(公告)号：US20110150347A1

公开(公告)日：2011-06-23

申请号：US12655216

申请日：2009-12-23

申请人： Shen-ge Wang ,  Beilei Xu ,  Robert P. Loce

发明人： Shen-ge Wang ,  Beilei Xu ,  Robert P. Loce

IPC分类号： G06K9/68

CPC分类号： G06T7/001 ,  G06T2207/10008 ,  G06T2207/30144

摘要： Embodiments described herein are directed to detecting and/or measuring distortions of substrate media that can occur during a printing process. The distortion can be detected and/or measured using a composite image generated from a reference image having a first periodic pattern and print image, disposed on a test substrate media, having a second periodic pattern. The first and second periodic patterns are specified so that the composite image includes a moiré pattern having moiré fringes resulting from interference between the first periodic pattern associated with the reference image and the second periodic pattern associated with the print image. The moiré fringes can be used to detect and calculate an amount of distortion of the test substrate media.

摘要翻译： 本文描述的实施例涉及检测和/或测量可能在印刷过程中发生的基底介质的变形。 可以使用从具有第二周期性图案的设置在测试基板介质上的具有第一周期图案和打印图像的参考图像生成的合成图像来检测和/或测量失真。 指定第一和第二周期性图案，使得合成图像包括具有由与参考图像相关联的第一周期性图案与与打印图像相关联的第二周期性图案之间的干涉而产生的莫尔条纹的莫尔图案。 莫尔条纹可用于检测和计算测试基板介质的变形量。

公开(公告)号：US07139101B2

公开(公告)日：2006-11-21

申请号：US10285716

申请日：2002-10-31

申请人： Robert P. Loce ,  Beilei Xu ,  Shen-ge Wang

发明人： Robert P. Loce ,  Beilei Xu ,  Shen-ge Wang

IPC分类号： H04N1/405 ,  H04N1/409

CPC分类号： H04N1/4051

摘要： A system and method for the halftoning of gray scale images by utilizing a pixel-by-pixel comparison of the image against an anisotropic stochastic screen is disclosed. The anisotropic stochastic screen comprises a non-deterministic, non-white noise function which, when thresholded, is designed to produce anisotropic dot patterns having a power spectrum characterized as having negligible low frequency components and a high-frequency region which has an absence of stronger dominant spikes.

摘要翻译： 公开了通过利用图像与各向异性随机屏幕的逐像素比较来对灰度图像进行半色调的系统和方法。 各向异性随机屏幕包括非确定性的非白噪声函数，其在阈值时被设计成产生具有特征在于具有可忽略的低频分量的功率谱的各向异性点图形和不存在强度的高频区域 主导尖峰。

公开(公告)号：US20130148168A1

公开(公告)日：2013-06-13

申请号：US13313329

申请日：2011-12-07

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

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

IPC分类号： H04N1/405

CPC分类号： G06T1/0028 ,  G06T2201/0051 ,  H04N1/32256

摘要： As set forth herein, computer-implemented methods and systems facilitate watermarking documents and/or images using 2nd generation stochastic halftoning. The watermark is used to spatially vary the gray level at which a frequency modulation-to-amplitude modulation transition occurs. The encoding algorithm uses as inputs a contone image and a watermark. The visibility of the watermark is controlled by the magnitude of the difference between the AM-to-FM transition threshold values.

摘要翻译： 如本文所述，计算机实现的方法和系统便于使用第二代随机半色调来水印文档和/或图像。 水印用于在空间上改变发生频率调制到幅度调制转换的灰度级。 编码算法使用连字图像和水印作为输入。 水印的可视性由AM到FM转换阈值之间的差值的大小控制。

公开(公告)号：US20120274985A1

公开(公告)日：2012-11-01

申请号：US13096429

申请日：2011-04-28

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

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

IPC分类号： H04N1/405

CPC分类号： H04N1/4055

摘要： As set forth herein, computer-implemented methods and systems facilitate halftoning using a parametrically controlled spot function based on triangle tessellation, which in turn facilitates dot growth control of periodic halftone using an irregular seed structure. The spot function determines the shape of the halftone dot used to reproduce a given pixel. The spot function is well suited for growing halftone dots arrayed on a non-regular grid and can also be used for grids with regular order. The spot function includes adjustable parameters for controlling its sharpness and slope.

摘要翻译： 如本文所述，计算机实现的方法和系统使用基于三角形镶嵌的参数控制的点函数来促进半色调调整，这进一步促进了使用不规则种子结构的周期性半色调的点生长控制。 点功能决定用于再现给定像素的半色调点的形状。 斑点功能非常适合生长在非规则网格上的半色调点，并且也可以用于具有定期顺序的网格。 点功能包括用于控制其锐度和斜率的可调参数。

公开(公告)号：US20140029073A1

公开(公告)日：2014-01-30

申请号：US13559866

申请日：2012-07-27

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： G03F3/08

CPC分类号： G06T5/005 ,  H04N1/4097

摘要： When restoring a scanned halftone image of a damaged document, parameters of the halftone structure (geometry) are estimated, as is an intended contone gray level for damaged portions of the image. Locations of halftone cell tiles in the scanned image are determined based on the halftone structure, and a halftone profile model is generated using the estimated halftone parameters and contone information. Image segments are aligned using global features for coarse alignment and halftone structure for fine alignment, such as in cases where the scanned halftone image contains unconnected fragments. Missing parts of the damaged document image are filled in using the halftone profile model and estimated contone values.

摘要翻译： 当恢复损坏的文档的扫描半色调图像时，会对该半色调结构（几何）的参数进行估计，对于损坏的图像部分，也是预期的连续色调灰度级。 基于半色调结构确定扫描图像中的半色调单元瓦片的位置，并且使用估计的半色调参数和连续色调信息生成半色调轮廓模型。 图像片段使用用于粗略对齐和半色调结构的全局特征进行对齐，用于精细对齐，例如在扫描的半色调图像包含未连接片段的情况下。 使用半色调配置文件模型和估计的连续色调值填充损坏的文档图像的缺失部分。

公开(公告)号：US08547598B2

公开(公告)日：2013-10-01

申请号：US13096520

申请日：2011-04-28

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 ,  G06F15/00

CPC分类号： H04N1/4055

摘要： As set forth herein, computer-implemented methods and systems facilitate halftoning using boundaries and centers of a polygonal tiling with a parameterized spot function that operates within the tiles. Defining the halftone structure includes defining the polygonal tiling with a specification of the polygon boundaries and center, and setting and applying parameters of the spot function, which utilizes center-to-boundary distances. The tiling can be defined explicitly, by defining a tile structure, or providing centers, one per polygon, and vertices for the polygons. The vertices and centers are used to generate the polygon boundaries. The polygonal tiling can be regular (e.g., repetitive) or irregular, and can also be varied in a manner adapted to the image content or to data that is being embedded.

摘要翻译： 如本文所述，计算机实现的方法和系统利用在瓦片内操作的参数化点函数的多边形平铺的边界和中心进行半色调。 定义半色调结构包括使用多边形边界和中心的规格定义多边形平铺，以及利用中心到边界距离设置和应用点函数的参数。 可以通过定义瓦片结构或为多边形提供中心，每个多边形和顶点来定义平铺。 顶点和中心用于生成多边形边界。 多边形拼贴可以是规则的（例如，重复的）或不规则的，并且还可以以适于图像内容或嵌入的数据的方式进行变化。

公开(公告)号：US08467103B2

公开(公告)日：2013-06-18

申请号：US12539848

申请日：2009-08-12

申请人： Shen-ge Wang ,  Robert P. Loce

发明人： Shen-ge Wang ,  Robert P. Loce

IPC分类号： H04N1/405 ,  G06T5/00

CPC分类号： H04N1/4051 ,  H04N1/4058

摘要： Disclosed are moiré-free color halftoning methods, apparatus and systems to digitally reproduce an original color image. The disclosed embodiments are particularly useful for rendering a color image with a color printing device. According to one exemplary embodiment, an image forming method utilizes three or four rotated hexagonal screens which can include regular shaped hexagon screens or convex tessellated hexagon screens.

摘要翻译： 公开的是无摩尔色彩色调方法，用于数字再现原始彩色图像的装置和系统。 所公开的实施例对于用彩色打印设备渲染彩色图像特别有用。 根据一个示例性实施例，图像形成方法利用三个或四个旋转的六边形屏幕，其可以包括规则形状的六边形屏幕或凸镶嵌的六边形屏幕。

公开(公告)号：US20120293842A1

公开(公告)日：2012-11-22

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：US20120133990A1

公开(公告)日：2012-05-31

申请号：US12956469

申请日：2010-11-30

申请人： Shen-ge Wang ,  Robert P. Loce

发明人： Shen-ge Wang ,  Robert P. Loce

IPC分类号： G06K15/02

CPC分类号： H04N1/52

摘要： Provided is a 3-colorant DOD (dot-off-dot) periodic halftone geometry used to render an image. The DOD 3-colorant halftone geometry includes a base colorant halftone screen with hexagonally tiled halftone dots arranged in a hexagonal pattern, the hexagonally tiled halftone dots having a first fundamental frequency vector Vh1, a second fundamental frequency vector Vh2, and a third fundamental frequency vector Vh3, where Vh3 is substantially equivalent to Vh1+Vh2.

摘要翻译： 提供了用于渲染图像的3-着色剂DOD（点 - 点）周期性半色调几何。 DOD 3着色剂半色调几何形状包括具有以六边形图案排列的六角形平铺半色调点的基础着色剂半色调筛网，六边形平铺半色调点具有第一基频矢量Vh1，第二基本频率矢量Vh2和第三基频矢量 Vh3，其中Vh3基本上等于Vh1 + Vh2。