Generating image embedded with UV fluorescent watermark by combining binary images generated using different halftone strategies
    71.
    发明授权
    Generating image embedded with UV fluorescent watermark by combining binary images generated using different halftone strategies 有权
    通过组合使用不同半色调策略生成的二进制图像,生成嵌入UV荧光水印的图像

    公开(公告)号:US08179570B2

    公开(公告)日:2012-05-15

    申请号:US12414788

    申请日:2009-03-31

    摘要: Methods are provided for creating a fluorescent watermark within an image on a substrate, such as paper. The method involves creating a halftone image using two different halftone strategies. The halftone method is combined with a binary watermark mask to form two color patterns (e.g., one in a background region of the image and one in a watermark region of the image) and two successive-filling halftone algorithms, such that the ink droplets deposited by one color pattern cover more of the substrate than the ink droplets deposited by the other color pattern, with the two color patterns having approximately the same reflectance under normal light. However, under UV illumination, a visible difference (e.g., the watermark) is seen in the two patterns.

    摘要翻译: 提供了用于在诸如纸之类的基底上的图像内创建荧光水印的方法。 该方法涉及使用两种不同的半色调策略来创建半色调图像。 将半色调方法与二进制水印掩模组合以形成两种颜色图案(例如,图像的背景区域中的一个,图像的水印区域中的一个)和两个连续填充半色调算法,使得墨滴沉积 通过一种颜色图案覆盖比通过另一种颜色图案沉积的墨滴更多的基底,其中两种颜色图案在正常光下具有近似相同的反射率。 然而,在UV照射下,在两种图案中看到可见的差异(例如,水印)。

    Method for coherent watermark insertion and detection in color halftone images
    73.
    发明授权
    Method for coherent watermark insertion and detection in color halftone images 失效
    彩色半色调图像中相干水印插入和检测的方法

    公开(公告)号:US07952767B2

    公开(公告)日:2011-05-31

    申请号:US11615407

    申请日:2006-12-22

    IPC分类号: H04N1/40 G06K15/00

    摘要: A method for generating an authenticable color image, the color image including a plurality of color separations, wherein an authentication image inserted in the multicolor image is not readily visually perceptible, includes halftoning image data corresponding to a first color separation using a single halftone screen, wherein the halftone screen includes means for generating an authentication image in a color image; and halftoning image data corresponding to a second color separation using the halftone screen and dot placement information for the image data corresponding to the first color separation to form a multicolor image; wherein halftoning of image data corresponding to the second color separation includes placing dots for the second color separation in thresholds of the halftone screen relative to those thresholds occupied by the first color separation in the halftone screen in accordance with a predetermined relationship.

    摘要翻译: 一种用于生成可认证彩色图像的方法,所述彩色图像包括多个分色,其中插入所述多色图像中的认证图像不容易在视觉上可感知,包括使用单个半色调屏幕对与第一颜色分离相对应的图像数据进行半色调, 其中所述半色调网屏幕包括用于在彩色图像中生成认证图像的装置; 以及使用所述半色调屏幕对应于第二颜色分离的图像数据和对应于所述第一颜色分离的所述图像数据的点布置信息进行半色调处理,以形成多色图像; 其中对应于所述第二颜色分离的图像数据的半色调包括根据预定关系在所述半色调屏幕中相对于所述半色调屏幕中的所述第一颜色分离占据的所述阈值,在所述半色调屏幕的阈值中放置用于所述第二颜色分离的点。

    MOIRÉ-FREE COLOR HALFTONING METHODS, APPARATUS AND SYSTEMS
    74.
    发明申请
    MOIRÉ-FREE COLOR HALFTONING METHODS, APPARATUS AND SYSTEMS 有权
    免费彩色半自动化方法,装置和系统

    公开(公告)号:US20110038008A1

    公开(公告)日:2011-02-17

    申请号:US12539925

    申请日:2009-08-12

    IPC分类号: H04N1/405

    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。

    Conjugate cluster screens for embedding digital watermarks into printed halftone documents
    75.
    发明授权
    Conjugate cluster screens for embedding digital watermarks into printed halftone documents 有权
    用于将数字水印嵌入到打印的半色调文档中的共轭聚类屏幕

    公开(公告)号:US07352879B2

    公开(公告)日:2008-04-01

    申请号:US11006198

    申请日:2004-12-06

    申请人: Shen-ge Wang

    发明人: Shen-ge Wang

    IPC分类号: H04K1/00

    摘要: Methods and systems for utilizing conjugate cluster halftone screens to embed patterns or images as invisible watermarks into both digital halftone image files and corresponding printed documents are disclosed. In general, two or more two-conjugate halftone screens can be configured to provide a basic information carrier for embedding a digital watermark into a document. Thereafter, one or more clusters can be created from the two-conjugate halftone screens, wherein such clusters include the same centroid position relative to a grid defined by fundamental halftone frequencies. Two halftone patterns can then be blended from the two-conjugate halftone screens in a cluster-to-cluster basis so that virtually no loss of image quality occurs in comparison with an output of either the two-conjugate halftone screens, thereby permitting the digital watermark to be embedded into the document utilizing the two-conjugate halftone screens.

    摘要翻译: 公开了用于利用共轭簇半色调屏幕将图案或图像作为不可见水印嵌入到数字半色调图像文件和对应的打印文档中的方法和系统。 通常,两个或更多个双共轭半色调屏幕可以被配置为提供用于将数字水印嵌入到文档中的基本信息载体。 此后,可以从双共轭半色调屏幕创建一个或多个簇,其中这样的簇包括相对于由基本半色调频率限定的网格的相同重心位置。 然后可以从群集到群集的基础上将两个半色调图案从双共轭半色调屏幕混合,使得与双共轭半色调网屏幕的输出相比,几乎不会发生图像质量损失,从而允许数字水印 使用双共轭半色调网屏幕嵌入到文档中。

    Tag control for runtime glossmarks
    76.
    发明授权
    Tag control for runtime glossmarks 有权
    标签控制运行时光标

    公开(公告)号:US07193751B2

    公开(公告)日:2007-03-20

    申请号:US10319054

    申请日:2002-12-12

    IPC分类号: H04N1/405 B41M3/10

    摘要: The present invention relates to the manipulation of differential gloss as may be inherent in halftoned images by utilization of tags. By selectively applying halftones with anisotropic structure characteristics, which are significantly different in orientation while remaining identical in density, as directed by tag settings, a gloss image may be superimposed within an image without the need for special toners or paper. Conventional copier systems will not typically be able to copy such a superimposed gloss image.

    摘要翻译: 本发明涉及通过利用标签对半色调图像固有的差异光泽的操作。 通过选择性地应用具有各向异性结构特征的半色调,其在取向上显着不同,同时保持密度相同,如标签设置所指示的,光泽图像可以叠加在图像内,而不需要特殊的调色剂或纸张。 传统的复印机系统通常不能复制这种叠加的光泽图像。

    Method for efficient calibration of printing devices
    77.
    发明授权
    Method for efficient calibration of printing devices 有权
    打印设备有效校准的方法

    公开(公告)号:US06775029B1

    公开(公告)日:2004-08-10

    申请号:US09699872

    申请日:2000-10-30

    IPC分类号: G06F1500

    摘要: A method for characterizing a printing device response for a halftone screen includes (a) generating a plurality of test patches, each test patch comprising a dot pattern having less than three different base patterns for the halftone screen; (b) measuring the luminance of selected ones of the test patches; (c) plotting the luminance measurements to provide a set of calibrated points on a printer calibration curve; and (d) generating the printer calibration curve between adjacent calibrated points using an equation establishing a relationship between ink area coverage and reflectance of the image.

    摘要翻译: 用于表征半色调屏幕的打印装置响应的方法包括(a)产生多个测试贴片,每个测试贴片包括具有少于三个不同基底图案的点阵图案用于半色调屏幕; (b)测量所选择的所述测试片的亮度; (c)绘制亮度测量值以在打印机校准曲线上提供一组校准点; 和(d)使用建立墨水面积覆盖率和图像反射率之间的关系的方程来产生相邻校准点之间的打印机校准曲线。

    Systems and methods for producing visible watermarks by halftoning
    78.
    发明授权
    Systems and methods for producing visible watermarks by halftoning 失效
    通过半色调生成可见水印的系统和方法

    公开(公告)号:US06526155B1

    公开(公告)日:2003-02-25

    申请号:US09449356

    申请日:1999-11-24

    IPC分类号: G06K900

    CPC分类号: G06T1/005 G06T2201/0051

    摘要: Visible digital watermarks enable a robust tracking method to be associated with one or more input images. Specifically, by modifying a halftone screen within a certain area by setting a gray-scale range within that area to a threshold, and halftoning an input image based on this modified halftone screen, visible watermarks can be embedded into an input image.

    摘要翻译: 可视数字水印使得鲁棒跟踪方法能够与一个或多个输入图像相关联。 具体地说,通过将该区域内的灰阶范围设定为阈值来修改某一区域内的半色调画面,并根据该修改后的半色调画面对输入图像进行半色调处理,将可视水印嵌入到输入图像中。

    Digital watermarking using phase-shifted stoclustic screens
    79.
    发明授权
    Digital watermarking using phase-shifted stoclustic screens 失效
    数字水印使用相移的屏幕

    公开(公告)号:US06252971B1

    公开(公告)日:2001-06-26

    申请号:US09069095

    申请日:1998-04-29

    申请人: Shen-ge Wang

    发明人: Shen-ge Wang

    IPC分类号: G06K900

    摘要: A system and method for digital watermark embedding and retrieval using phase shift stoclustic (stochastically clustered) screens. Watermarks are embedded based on the phase shift of clustered halftone screens. Therefore, the hidden information, or invisible watermark, can be detected and visualized by correlating clusters as opposed to the pixel-based correlation required by other methods. Therefore, the detection of watermarks is much easier, especially when distortions have been introduced into the embedded image. By replacing regular cluster halftone screens with stoclustic screens for hidden watermarks, watermarks can quickly be embedded and retrieved

    摘要翻译: 一种使用相移(随机聚类)屏幕进行数字水印嵌入和检索的系统和方法。 基于集群半色调屏幕的相移嵌入水印。 因此,隐藏信息或不可见水印可以通过相关于与其他方法所要求的基于像素的相关性相关而被检测和可视化。 因此,水印的检测要容易得多,特别是当嵌入图像中引入失真时。 通过用静态屏幕替换常规的群集半色调屏幕来隐藏水印,可以快速嵌入和检索水印

    Parametrically controlled halftone spot function for an irregular halftone grid
    80.
    发明授权
    Parametrically controlled halftone spot function for an irregular halftone grid 有权
    用于不规则半色调网格的参数控制半色调点功能

    公开(公告)号:US08576449B2

    公开(公告)日:2013-11-05

    申请号:US13096429

    申请日:2011-04-28

    IPC分类号: H04N1/405 H04N1/46 G06K15/00

    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。