公开(公告)号：US20110279831A1

公开(公告)日：2011-11-17

申请号：US12780222

申请日：2010-05-14

申请人： Omri Shacham ,  Gidi Amir ,  Mani Fischer ,  Dror Kella ,  David Savelzon ,  Oren Haik ,  Tamar Kashti

发明人： Omri Shacham ,  Gidi Amir ,  Mani Fischer ,  Dror Kella ,  David Savelzon ,  Oren Haik ,  Tamar Kashti

IPC分类号： G06F15/00

CPC分类号： B41F15/10 ,  H04N1/52

摘要： A set of screens is provided for use in printing respective color separations in a halftone color printing process. This set of screens comprises at least two clustered-dot screens and the frequency and angle parameter values of the screens is such that the lowest frequency moiré produced by any combination of at least two frequency components, taken from the group comprising the first and second screen harmonics, for which the sum of the harmonic orders of the frequency components in the combination is less than a predetermined value, is of a sufficiently high frequency as to be substantially unperceivable to the human visual system; other moirés are also substantially unperceivable to the human visual system. The lowest frequency moiré serves to reduce the visibility of color changes caused by color plane registration variations. A printing system and method employing the screen set are also provided.

摘要翻译： 提供一组屏幕用于在半色调彩色打印过程中打印相应的分色。 这组屏幕包括至少两个聚集点屏幕，并且屏幕的频率和角度参数值使得由包括第一和第二屏幕的组中的至少两个频率分量的任何组合产生的最低频率莫尔 组合中的频率分量的谐波次数的和小于预定值的谐波具有足够高的频率，对于人类视觉系统而言基本上不可理解; 其他莫尔也对人类视觉系统基本上不可察觉。 最低频波纹用于降低由色平面配准变化引起的颜色变化的可视性。 还提供了采用该屏幕组的打印系统和方法。

公开(公告)号：US08355189B2

公开(公告)日：2013-01-15

申请号：US12780222

申请日：2010-05-14

申请人： Omri Shacham ,  Gidi Amir ,  Mani Fischer ,  Dror Kella ,  David Savelzon ,  Oren Haik ,  Tamar Kashti

发明人： Omri Shacham ,  Gidi Amir ,  Mani Fischer ,  Dror Kella ,  David Savelzon ,  Oren Haik ,  Tamar Kashti

IPC分类号： H04N1/52 ,  H04N1/58

CPC分类号： B41F15/10 ,  H04N1/52

摘要： A set of screens is provided for use in printing respective color separations in a halftone color printing process. This set of screens comprises at least two clustered-dot screens and the frequency and angle parameter values of the screens is such that the lowest frequency moiré produced by any combination of at least two frequency components, taken from the group comprising the first and second screen harmonics, for which the sum of the harmonic orders of the frequency components in the combination is less than a predetermined value, is of a sufficiently high frequency as to be substantially unperceivable to the human visual system; other moirés are also substantially unperceivable to the human visual system. The lowest frequency moiré serves to reduce the visibility of color changes caused by color plane registration variations. A printing system and method employing the screen set are also provided.

摘要翻译： 提供一组屏幕用于在半色调彩色打印过程中打印相应的分色。 这组屏幕包括至少两个聚集点屏幕，并且屏幕的频率和角度参数值使得由包括第一和第二屏幕的组中的至少两个频率分量的任何组合产生的最低频率莫尔 组合中的频率分量的谐波次数的和小于预定值的谐波具有足够高的频率，对于人类视觉系统而言基本上不可理解; 其他莫尔也对人类视觉系统基本上不可察觉。 最低频波纹用于降低由色平面配准变化引起的颜色变化的可视性。 还提供了采用该屏幕组的打印系统和方法。

公开(公告)号：US08576448B2

公开(公告)日：2013-11-05

申请号：US13006234

申请日：2011-01-13

申请人： Omri Shacham ,  Jan Allebach ,  Madhur Gupta ,  Carl Staelin ,  Mani Fischer ,  Puneet Goyal ,  Tamar Kashti

发明人： Omri Shacham ,  Jan Allebach ,  Madhur Gupta ,  Carl Staelin ,  Mani Fischer ,  Puneet Goyal ,  Tamar Kashti

IPC分类号： H04N1/405 ,  H04N1/46

CPC分类号： H04N1/4055

摘要： A method for generating a clustered halftone representation of a continuous-tone image for printing includes applying a search technique. In the search technique, evaluation of a similarity between an initial halftone and the continuous-tone image includes application of an initialization filter to an initial error image that represents a difference between the initial halftone and the continuous-tone image. Evaluation of a similarity between each updated halftone, formed by modifying a previously-evaluated halftone, and the continuous-tone image includes application of an update filter that is different from the initialization filter to an updated error image that represents a difference between the updated halftone and the continuous-tone image. Relating computer program product and data processing system are also disclosed.

摘要翻译： 用于生成用于打印的连续色调图像的聚集半色调表示的方法包括应用搜索技术。 在搜索技术中，对初始半色调和连续色调图像之间的相似度的评估包括将初始化滤波器应用于表示初始半色调和连续色调图像之间的差异的初始误差图像。 通过修改先前评估的半色调形成的每个更新的半色调和连续色调图像之间的相似度的评估包括将不同于初始化过滤器的更新过滤器应用于更新的错误图像，所述更新的错误图像表示更新的半色调 和连续色调图像。 还公开了关于计算机程序产品和数据处理系统。

公开(公告)号：US08537423B2

公开(公告)日：2013-09-17

申请号：US13007013

申请日：2011-01-14

申请人： Omri Shacham ,  Jan Allebach ,  Doron Shaked ,  Carl Staelin ,  Mani Fischer ,  Puneet Goyal ,  Madhur Gupta ,  Tamar Kashti

发明人： Omri Shacham ,  Jan Allebach ,  Doron Shaked ,  Carl Staelin ,  Mani Fischer ,  Puneet Goyal ,  Madhur Gupta ,  Tamar Kashti

IPC分类号： H04N1/405

CPC分类号： H04N1/405

摘要： A method for predicting an appearance of a rendering by a printer of a digital halftone representation of a continuous-tone image includes calculating a predicted absorptance value of a dot of a rendered halftone of the digital halftone representation. The dot corresponds to a pixel of the digital halftone representation. The predicted absorptance value is based on a configuration of pixel values of pixels in an immediate neighborhood of the pixel, and on a weighted contribution of a pixel value of each pixel in an outer neighborhood of the pixel. The method may be incorporated into a halftoning technique. Relating computer program product and data processing system are also disclosed.

摘要翻译： 用于预测连续色调图像的数字半色调表示的打印机呈现外观的方法包括计算数字半色调表示的再现半色调的点的预测吸收值。 点对应于数字半色调表示的像素。 预测的吸收率值基于像素的紧邻区域中的像素的像素值的配置以及像素的外部邻域中的每个像素的像素值的加权贡献。 该方法可以并入半色调技术中。 还公开了关于计算机程序产品和数据处理系统。

公开(公告)号：US09736332B2

公开(公告)日：2017-08-15

申请号：US13308061

申请日：2011-11-30

申请人： Omri Shacham ,  Oren Haik ,  Smadar Shiffman ,  Oded Perry

发明人： Omri Shacham ,  Oren Haik ,  Smadar Shiffman ,  Oded Perry

IPC分类号： H04N1/40 ,  G06K15/00 ,  H04N1/38 ,  G06T5/00 ,  G06T7/194 ,  H04N1/64

CPC分类号： H04N1/38 ,  G06T5/002 ,  G06T7/194 ,  G06T2207/20021 ,  H04N1/642

摘要： A method includes obtaining an image of a document against a background. A bounding box that bounds a region of the image that is distinguishable from the background is found. Coordinates of a plurality of points of the distinguishable region are found, each point being a point of the distinguishable region that is closest to each corner of the bounding box. The document is identified within the image as a region of the image whose corners are defined by the found coordinates.

公开(公告)号：US20140132694A1

公开(公告)日：2014-05-15

申请号：US14125158

申请日：2011-06-15

申请人： Omri Shacham ,  Oren Haik

发明人： Omri Shacham ,  Oren Haik

IPC分类号： B41M3/14

CPC分类号： B42D25/378 ,  B41F11/02 ,  B41M3/14 ,  B41M3/146 ,  B42D25/29 ,  B42D2035/26 ,  G03G21/043 ,  H04N1/00883

摘要： Printing with a single colorant a security feature imperceptible to the naked eye. For a digital security image having a first region formed by a first pattern of binary pixels and a second region formed by a different second pattern of binary pixels, the first and second patterns are printed with the single colorant. A darker one of the first and second printed patterns is determined. The security image is printed with the single colorant, the region corresponding to the darker printed pattern printed at a reduced gray level such that the printed first and second regions appear substantially indistinguishable to the naked eye.

摘要翻译： 用单一着色剂印刷肉眼不可察觉的安全特征。 对于具有由二进制像素的第一图案形成的第一区域和由不同的二进制像素的第二图案形成的第二区域的数字安全图像，第一图案和第二图案用单个着色剂印刷。 确定第一和第二印刷图案中较暗的一个。 用单一着色剂打印安全图像，对应于较暗印刷图案的区域以更低的灰度级印刷，使得印刷的第一和第二区域看起来基本上与肉眼不可区分。

公开(公告)号：US20100080487A1

公开(公告)日：2010-04-01

申请号：US12446790

申请日：2007-10-22

申请人： Yitzhak Yitzhaky ,  Omri Shacham ,  Oren Haik

发明人： Yitzhak Yitzhaky ,  Omri Shacham ,  Oren Haik

IPC分类号： G06K9/40

CPC分类号： G06T5/003 ,  G06T5/20 ,  G06T7/13

摘要： A system and a method for automatic restoration of isotropic degradations of a digital image, based on receiving a blurred image by an image capture assembly, automatically finding proper step edge, calculating the PSF from the step edge, and restoring the blurred image by means of a processor, and with the option to display the resorted image by means of an output assembly.

摘要翻译： 一种用于自动恢复数字图像的各向同性降解的系统和方法，其基于通过图像捕获组件接收模糊图像，自动找到适当的阶梯边缘，从台阶边缘计算PSF，以及通过以下步骤恢复模糊图像： 一个处理器，并且可以通过一个输出组件来显示被撤销的图像。

公开(公告)号：US09340055B2

公开(公告)日：2016-05-17

申请号：US14125158

申请日：2011-06-15

申请人： Omri Shacham ,  Oren Haik

发明人： Omri Shacham ,  Oren Haik

IPC分类号： B41J2/01 ,  B41M3/14 ,  H04N1/00 ,  B41F11/02 ,  G03G21/04 ,  B42D25/29

CPC分类号： B42D25/378 ,  B41F11/02 ,  B41M3/14 ,  B41M3/146 ,  B42D25/29 ,  B42D2035/26 ,  G03G21/043 ,  H04N1/00883

摘要： Printing with a single colorant a security feature imperceptible to the naked eye. For a digital security image having a first region formed by a first pattern of binary pixels and a second region formed by a different second pattern of binary pixels, the first and second patterns are printed with the single colorant. A darker one of the first and second printed patterns is determined. The security image is printed with the single colorant, the region corresponding to the darker printed pattern printed at a reduced gray level such that the printed first and second regions appear substantially indistinguishable to the naked eye.

摘要翻译： 用单一着色剂印刷肉眼不可察觉的安全特征。 对于具有由二进制像素的第一图案形成的第一区域和由不同的二进制像素的第二图案形成的第二区域的数字安全图像，第一图案和第二图案用单个着色剂印刷。 确定第一和第二印刷图案中较暗的一个。 用单一着色剂打印安全图像，对应于较暗印刷图案的区域以更低的灰度级印刷，使得印刷的第一和第二区域看起来基本上与肉眼不可区分。

公开(公告)号：US08249357B2

公开(公告)日：2012-08-21

申请号：US12446790

申请日：2007-10-22

申请人： Yitzhak Yitzhaky ,  Omri Shacham ,  Oren Haik

发明人： Yitzhak Yitzhaky ,  Omri Shacham ,  Oren Haik

IPC分类号： G06K9/48

CPC分类号： G06T5/003 ,  G06T5/20 ,  G06T7/13

摘要： A system and a method for automatic restoration of isotropic degradations of a digital image, based on receiving a blurred image by an image capture assembly, automatically finding proper step edge, calculating the PSF from the step edge, and restoring the blurred image by means of a processor, and with the option to display the resorted image by means of an output assembly.

摘要翻译： 一种用于自动恢复数字图像的各向同性降解的系统和方法，其基于通过图像捕获组件接收模糊图像，自动找到适当的阶梯边缘，从台阶边缘计算PSF，以及通过以下步骤恢复模糊图像： 一个处理器，并且可以通过一个输出组件来显示被撤销的图像。

公开(公告)号：US08472081B2

公开(公告)日：2013-06-25

申请号：US13011311

申请日：2011-01-21

申请人： Omri Shacham ,  Jan Allebach ,  Mani Fischer ,  Doron Shaked ,  Carl Staelin ,  Jin-Young Kim ,  Yung-Yao Chen

发明人： Omri Shacham ,  Jan Allebach ,  Mani Fischer ,  Doron Shaked ,  Carl Staelin ,  Jin-Young Kim ,  Yung-Yao Chen

IPC分类号： H04N1/405 ,  H04N1/60 ,  H04N1/46

CPC分类号： H04N1/4058 ,  H04N1/52

摘要： A method for designing a screen set for color halftoning includes selecting a screen set that includes at least two screens. The screens are applied to a uniform color image so as to form a set of corresponding colorant halftones. The colorant halftones are superposed to form a color halftone. A spatial frequency spectrum of the color halftone is calculated. Maxima of the spatial frequency spectrum that occur at two effective frequencies are identified, the two effective frequencies being located in two adjacent quadrants of a complex spatial frequency space. A magnitude of each effective frequency is compared with a predetermined frequency magnitude. The screen set is accepted for future application for color halftoning only if both effective frequency magnitudes are greater than the predetermined frequency magnitude. Relating computer program product and data processing system are also disclosed.

摘要翻译： 一种用于设计用于彩色半色调的屏幕组的方法包括选择包括至少两个屏幕的屏幕组。 将屏幕应用于均匀的彩色图像，以便形成一组相应的着色剂半色调。 将着色剂半色调叠加以形成彩色半色调。 计算颜色半色调的空间频谱。 识别在两个有效频率处发生的空间频谱的最大值，两个有效频率位于复数空间频率空间的两个相邻象限中。 将每个有效频率的大小与预定频率幅度进行比较。 仅当有效频率大于预定频率幅度时，屏幕组才被接受用于彩色半色调的将来应用。 还公开了关于计算机程序产品和数据处理系统。