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51. 发明授权

US06717696B1 Systems and methods for moiré-reduced halftoning 有权
标题翻译：用于莫尔减半色调的系统和方法
公开(公告)号：US06717696B1
公开(公告)日：2004-04-06
申请号：US09329265
申请日：1999-06-28
申请人： Shen-ge Wang , Zhigang Fan
发明人： Shen-ge Wang , Zhigang Fan
IPC分类号： G06F1500
CPC分类号： G06K15/02 , H04N1/40075 , H04N1/4055 , H04N1/409
摘要： By using negative feedback, moiré patterns can be reduced, or virtually eliminated, from input black-and-white or color original images. In particular, by feeding back an image containing the difference between the original input image and the halftone output with possible moiré patterns, and subtracting the low-frequency part of this image from the original input image, a resultant halftone image can be achieved that has reduced moiré patterns.
摘要翻译：通过使用负反馈，可以从输入黑白或彩色原始图像中减少或实际消除莫尔图案。特别地，通过将包含原始输入图像和半色调输出之间的差异的图像以可能的莫尔图案反馈，并且从原始输入图像中减去该图像的低频部分，可以实现所得到的半色调图像，其具有减少莫尔图案。

52. 发明授权

US06266157B1 Method of error diffusion using 2×2 color correction and increment matching 有权
标题翻译：使用2x2颜色校正和增量匹配的误差扩散方法
公开(公告)号：US06266157B1
公开(公告)日：2001-07-24
申请号：US09191790
申请日：1998-11-13
申请人： Zhigang Fan , Shen-ge Wang
发明人： Zhigang Fan , Shen-ge Wang
IPC分类号： H04N146
CPC分类号： H04N1/4053
摘要： A method of quantizing pixels from a first pixel depth to a second includes adding to an original value of each pixel to be quantized, an error value resulting from quantization of any previous pixels, to generate a modified pixel value; comparing each modified pixel with threshold varying in accordance with the gray difference that a printed mark would make to a neighborhood pixels and outputting second depth pixels responsive to said comparison; and determining a halftoning error as a function of the modified pixel values, the gray difference, and the binary signals, and distributing say error to other gray level pixels in an image.
摘要翻译：量化从第一像素深度到第二像素的像素的方法包括将要量化的每个像素的原始值添加到由任何先前像素的量化产生的误差值，以产生修正像素值; 将每个修改的像素与根据打印标记对邻近像素产生的灰度差变化的阈值进行比较，并响应于所述比较输出第二深度像素; 以及根据修改的像素值，灰度差和二进制信号确定半色调误差，并将所述误差分配给图像中的其他灰度级像素。

53. 发明授权

US08681387B2 Guilloche mark generation 有权
标题翻译： Guilloche标记代
公开(公告)号：US08681387B2
公开(公告)日：2014-03-25
申请号：US12958819
申请日：2010-12-02
申请人： Martin S. Maltz , Zhigang Fan , Reiner Eschbach , Judith Stinehour
发明人： Martin S. Maltz , Zhigang Fan , Reiner Eschbach , Judith Stinehour
IPC分类号： H04N1/32
CPC分类号： H04N1/0044 , H04N1/00883
摘要： A method and system for creating guilloché base pattern with two-dimensional periodicity in a plurality of replicate patterns is shown wherein the creating can be assessed in real-time for pattern acceptability by a user. A base pattern is set on an imaging device in vector space relative to a set of predetermined pattern nodes. The base pattern is modulated via a user interface by adjusting positions of the pattern known for selectively controlling curve shapes of the pattern. A guilloché mark is illustrated by display on the imaging device of the adjusted base pattern and a compilation of associated replicate patterns for user assessment of the mark.
摘要翻译：示出了用于在多个重复图案中创建具有二维周期性的illo形基底图案的方法和系统，其中可以实时地评估创建以便用户的图案可接受性。在相对于一组预定图案节点的向量空间中的成像装置上设置基本图案。通过调整已知的用于选择性地控制图案的曲线形状的图案的位置，经由用户界面调制基本图案。通过在成像装置上显示调整后的基本图案和用于用户评估标记的相关联的重复图案的汇编来说明illo迹标记。

54. 发明申请

US20140022603A1 VARIABLE DATA IMAGE WATERMARKING USING INFRARED SEQUENCE STRUCTURES IN BLACK SEPARATION 有权
标题翻译：在黑色分离中使用红外序列结构的可变数据图像水印
公开(公告)号：US20140022603A1
公开(公告)日：2014-01-23
申请号：US13553338
申请日：2012-07-19
申请人： Reiner Eschbach , Zhigang Fan , Martin E. Hoover
发明人： Reiner Eschbach , Zhigang Fan , Martin E. Hoover
IPC分类号： G06K15/02
CPC分类号： G06T1/0028 , G06T2201/0051 , H04N1/32261 , H04N1/32309 , H04N1/32331 , H04N1/32352 , H04N2201/327
摘要： An image watermarking method includes a color transform on RGB image data to derive CMYK image data that define a constant K image. Variable infrared (IR) mark data defining an IR mark are received and a sparse two-dimensional pattern of black pixels is defined that corresponds to the variable IR data, e.g., using Gold codes or pseudorandom binary sequences. A watermarked black separation K″ is defined by embedding the sparse two-dimensional pattern into the constant K black separation K′ while maintaining local average levels. A watermarked image includes the watermarked black separation K″ in combination with the CMY separations of the constant K image. A decoding process includes using an IR microscope fitted with IR LEDs and an IR pass filter to capture an IR image, which is subjected to exposure correction, thresholding, and dilation operations to extract the two-dimensional pattern for subsequent correlation processing.
摘要翻译：图像水印方法包括对RGB图像数据进行颜色变换以导出定义常数K图像的CMYK图像数据。接收定义IR标记的可变红外（IR）标记数据，并且例如使用Gold码或伪随机二进制序列来定义对应于可变IR数据的稀疏二维图案的黑色像素。通过将稀疏二维图案嵌入到常数K黑色分离K'中同时保持局部平均水平来定义水印黑色分离K“。水印图像包括与常数K图像的CMY分离相结合的水印黑色分离K“。解码过程包括使用装有IR LED的IR显微镜和IR通过滤光片来捕获经过曝光校正，阈值和扩张操作的IR图像，以提取二维图案用于随后的相关处理。

55. 发明授权

US08619074B2 Rendering personalized text on curved image surfaces 有权
标题翻译：在曲面图像表面上呈现个性化文字
公开(公告)号：US08619074B2
公开(公告)日：2013-12-31
申请号：US12964820
申请日：2010-12-10
申请人： Raja Bala , Zhigang Fan , Reiner Eschbach , Hengzhou Ding , Jan P. Allebach , Charles A. Bouman
发明人： Raja Bala , Zhigang Fan , Reiner Eschbach , Hengzhou Ding , Jan P. Allebach , Charles A. Bouman
IPC分类号： G06T15/00
CPC分类号： G06T11/60 , G06T15/04 , G06T19/00
摘要： As set forth herein, a computer-implemented method facilitates replacing text on cylindrical or curved surfaces in images. For instance, the user is first asked to perform a multi-click selection of a polygon to bound the text. A triangulation scheme is carried out to identify the pixels. Segmentation and erasing algorithms are then applied. The ellipses are estimated accurately through constrained least squares fitting. A 3D framework for rendering the text, including the central projection pinhole camera model and specification of the cylindrical object, is generated. These parameters are jointly estimated from the fitted ellipses as well as the two vertical edges of the cylinder. The personalized text is wrapped around the cylinder and subsequently rendered.
摘要翻译：如本文所述，计算机实现的方法有助于在图像中的圆柱形或弯曲表面上替换文本。例如，首先要求用户执行多边形的多点选择以绑定文本。进行三角测量方案来识别像素。然后应用分割和擦除算法。通过约束最小二乘拟合精确估计椭圆。生成用于呈现文本的3D框架，包括中心投影针孔相机模型和圆柱形对象的规格。这些参数是从安装的椭圆以及气缸的两个垂直边缘共同估计的。个性化文字包裹在圆柱体上并随后呈现。

56. 发明授权

US08139270B2 Variable data periodic line patterns for composing a font system 有权
标题翻译：用于组合字体系统的可变数据周期线图案
公开(公告)号：US08139270B2
公开(公告)日：2012-03-20
申请号：US11756375
申请日：2007-05-31
申请人： Zhigang Fan , Reiner Eschbach , Judith E. Stinehour
发明人： Zhigang Fan , Reiner Eschbach , Judith E. Stinehour
IPC分类号： H04N1/405
CPC分类号： B42D25/29
摘要： A method and system is provided for generating a variable data differential line pattern font comprising forming a periodic line pattern suitable for tessellation disposition within a printed document and selectively distorting a portion of the periodic line pattern in a predetermined manner wherein the distorting comprises generating a distinguishable font corresponding to the distorting. A plurality of different distinguishable fonts are formed by a corresponding plurality of distorted line patterns, respectively.
摘要翻译：提供了一种用于产生可变数据差分线图案字体的方法和系统，包括形成适合于打印文档内的镶嵌布置的周期性线图案，并且以预定方式选择性地扭曲周期线图案的一部分，其中，所述失真包括生成可区分的字体对应于扭曲。多个不同的可区分字体分别由对应的多个失真线图案形成。

57. 发明申请

US20110141530A1 Embedding information using modulated periodic line patterns 有权
标题翻译：使用调制的周期线图案嵌入信息
公开(公告)号：US20110141530A1
公开(公告)日：2011-06-16
申请号：US12637041
申请日：2009-12-14
申请人： Zhigang Fan , Reiner Eschbach , Judith Stinehour
发明人： Zhigang Fan , Reiner Eschbach , Judith Stinehour
IPC分类号： G06K15/02
CPC分类号： H04N1/32219 , G06T1/0021 , H04N1/32144 , H04N1/32261 , H04N2201/3226 , H04N2201/3271
摘要： A method and system is provided providing a variable data guilloché pattern comprised of variable data differential line pattern fonts comprising decodable template symbols which are capable of being selectively assembled into a predetermined variable data code. The differential line pattern fonts are further spatially modulated for imposition of a second data channel on a printed document. The representation can be decoded with a digital scanner capable of identifying the embedded patterns and spatially modulated transform function and communicate it to a user for verifying a document containing the code.
摘要翻译：提供了一种方法和系统，其提供包括可变数据差分线图案字体的可变数据纹迹图案，其包括可选择性地组装成预定可变数据代码的可解码模板符号。差分线图案字体被进一步空间调制以在打印文档上施加第二数据通道。该表示可以用能够识别嵌入图案和空间调制变换功能的数字扫描仪进行解码，并将其传送给用户以验证包含代码的文档。

58. 发明授权

US07787154B2 Font printing system having embedded security information comprising variable data periodic line patterns 有权
标题翻译：具有包括可变数据周期线图案的嵌入式安全信息的字体打印系统
公开(公告)号：US07787154B2
公开(公告)日：2010-08-31
申请号：US11756390
申请日：2007-05-31
申请人： Zhigang Fan , Reiner Eschbach , Judith E. Stinehour
发明人： Zhigang Fan , Reiner Eschbach , Judith E. Stinehour
IPC分类号： H04N1/405
CPC分类号： B42D25/337 , B41M3/14 , B42D2035/16 , G07D7/0053
摘要： A method and system is provided for providing a variable data guilloché shaped pattern comprised of variable data differential line pattern fonts comprising decodable template symbols which are capable of being selectively assembled into a predetermined variable data code. The code representations are embedded in the guilloché pattern amongst a plurality of unvaried standard base patterns. The representation can be decoded with a digital scan capable of identifying the embedded patterns and communicated it to a user for verifying a document containing the code.
摘要翻译：提供了一种方法和系统，用于提供包括可变数据差分线图案字体的可变数据纹波形图案，其包括可选择性地组装成预定可变数据代码的可解码模板符号。代码表示被嵌入在多个不变的标准基本模式之间的guilloché模式中。该表示可以用能够识别嵌入图案的数字扫描进行解码，并将其传达给用户以验证包含代码的文档。

59. 发明授权

US07634150B2 Removing ringing and blocking artifacts from JPEG compressed document images 失效
公开(公告)号：US07634150B2
公开(公告)日：2009-12-15
申请号：US12463768
申请日：2009-05-11
申请人： Basak Oztan , Zhigang Fan , Reiner Eschbach , Amal Z. Malik
发明人： Basak Oztan , Zhigang Fan , Reiner Eschbach , Amal Z. Malik
IPC分类号： G06K9/40
CPC分类号： H04N19/86
摘要： A method of removing ringing and blocking artifacts from a decompressed digital image. In one method, a background value of the digital image a background region and foreground regions is determined, and a threshold value is computed. A mapping of the digital image is then generated by thresholding the digital image based on the threshold value to produce a thresholded image, and enlarging the foreground regions of the thresholded image to form a map image. The mapping includes the background pixels of the map image. The background region of the decompressed digital image is then cleansed based on the mapping. In an alternate method, ringing artifacts are removed from a decompressed digital image based on a signal-to-noise ratio of the image. In yet another alternate embodiment, ringing artifacts are from a decompressed digital color image that includes a chrominance channel and a luminance channel. An alternate embodiment removes ringing and blocking artifacts.

60. 发明授权

US06980698B2 Image finder method and apparatus for pixography and other photo-related reproduction applications 失效
标题翻译：用于像素图和其他照片相关再现应用的图像寻像器方法和装置
公开(公告)号：US06980698B2
公开(公告)日：2005-12-27
申请号：US10200238
申请日：2002-07-22
申请人： Reiner Eschbach , Zhigang Fan
发明人： Reiner Eschbach , Zhigang Fan
IPC分类号： G06K9/64 , G06F17/30
CPC分类号： G06K9/6202 , Y10S707/99931
摘要： An image finder method and apparatus are provided for identifying a source image data file in a database based upon a printed image actually generated from a source image data file in the database. Input image data that represent a printed input image are received from a scanner. Source image data are received from the database that is defined by a plurality of different source image data files stored on a CD-ROM or other storage medium. Correlation operations are carried out to identify any source image data files that are highly correlated with the input image data. The results of the correlation operations are used to identify the source image data file from which the input printed image was actually generated or, if this is not possible, to identify more than one source image data file that could be the source image data file from which the printed input image was actually generated. Both the input image data and source image data are severely subsampled to obtain no more than about 1000 (and most preferably no more than 200) data values from each set of data for use in the correlation operation to provide for extremely fast processing without loss of accuracy.
摘要翻译：提供了一种图像取景器方法和装置，用于基于从数据库中的源图像数据文件实际生成的打印图像来识别数据库中的源图像数据文件。从扫描仪接收输入表示打印输入图像的图像数据。从数据库接收源图像数据，其由存储在CD-ROM或其他存储介质上的多个不同的源图像数据文件定义。执行相关操作以识别与输入图像数据高度相关的任何源图像数据文件。相关操作的结果用于识别实际生成输入打印图像的源图像数据文件，或者如果不可能，则识别可以是源图像数据文件的多于一个源图像数据文件，打印的输入图像实际上被生成。输入图像数据和源图像数据都被严重二次采样，以从相关运算中使用的每组数据获得不超过约1000个（最优选不超过200个）的数据值，以提供非常快速的处理，而不会损失准确性。

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