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公开(公告)号：US6055065A
公开(公告)日：2000-04-25
申请号：US132881
申请日：1998-08-12
CPC分类号： H04N1/405 , H04N1/4078
摘要： A method and apparatus for matching the print outputs of two printers having different characteristics. For the purpose of laser printing, or more generally for reproduction on any printing device with limited number of printing levels, a color or grayscale image has to be transformed into an array of printing decisions at each pixel of the output image. Sometimes this array is the only available representation of the original image. One may desire to print this array on a printer with different characteristics from the printer for which the array was originally prepared. The method and apparatus solve this problem by generating a printing decision matrix which takes into account the differences between the two printers.
摘要翻译： 一种用于匹配具有不同特征的两台打印机的打印输出的方法和装置。 为了激光打印的目的，或者更通常地，在具有有限数量的打印级别的任何打印设备上再现，颜色或灰度图像必须被变换成输出图像的每个像素处的打印决定的阵列。 有时这个数组是原始图像的唯一可用表示。 可能希望在具有与原始准备阵列的打印机不同的特征的打印机上打印该阵列。 该方法和装置通过产生考虑到两个打印机之间的差异的打印决策矩阵来解决这个问题。
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公开(公告)号：US5943477A
公开(公告)日：1999-08-24
申请号：US85094
申请日：1998-05-26
CPC分类号： H04N1/405 , H04N1/4078
摘要： A method and apparatus to calibrate a printer which do not depend on geometric assumptions on the printed dots. The method takes account of the fundamentally probabilistic nature of the process of printing any dot on some types of printers such as laser printers. It allows estimating the probability distribution of what gets printed at each pixel depending on the local configuration of dots to be printed in such a way that only a limited number of tests need to be done, while no artificial cutoff is introduced on the size of local configurations to be taken into account. The calibration method can be applied to many problems encountered in digital printing, and permits computing printer dependent calibration of a dithering method without need for further direct measurements.
摘要翻译： 校准不依赖于打印点上的几何假设的打印机的方法和装置。 该方法考虑到在某些类型的打印机（例如激光打印机）上打印任何点的过程的根本概率性质。 它允许根据要打印的点的本地配置来估计在每个像素处打印什么的概率分布，使得仅需要进行有限数量的测试，而在本地的大小上没有引入人工截止 需要考虑的配置。 校准方法可以应用于数字打印中遇到的许多问题，并允许计算打印机相关的抖动方法的校准，而无需进一步的直接测量。
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3.发明授权Methods and apparatus for generating dither mask through interpolation between preferred patterns 有权用于通过优选图案之间的插值产生抖动掩模的方法和装置公开(公告)号：US07446904B2
公开(公告)日：2008-11-04
申请号：US10856470
申请日：2004-05-28
IPC分类号： H04N1/405
CPC分类号： H04N1/4051
摘要： Techniques for generating dither masks are provided. A dither mask is generated by selecting a sequence of at least three original patterns comprising pixels of at least one of a first color and a second color. At least two patterns are interpolated to generate interpolated patterns in the sequence between the at least three original patterns. If a pattern having at least one specified characteristic exists in the sequence, the steps of interpolating between at least two patterns, and determining if a pattern having at least one specified characteristic exists in the sequence, are repeated. The interpolation is between at least one pattern from each side of the pattern having at least one specified characteristic in the sequence.
摘要翻译： 提供了产生抖动掩模的技术。 通过选择至少三个包括第一颜色和第二颜色中的至少一个的像素的原始图案的序列来生成抖动掩模。 内插至少两个图案以在至少三个原始图案之间的序列中生成插值图案。 如果序列中存在至少一个特定特征的图案，则重复在至少两个图案之间进行内插并确定序列中是否存在具有至少一个特定特征的图案的步骤。 该插值位于具有序列中至少一个指定特征的图案的每侧的至少一个图案之间。
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公开(公告)号：US6088123A
公开(公告)日：2000-07-11
申请号：US976248
申请日：1997-11-21
CPC分类号： H04N1/4051 , G06T1/0028
摘要： A method and apparatus for halftoning utilizes a truly aperiodic mask with memory requirements much smaller than the mask itself. The mask is constructed of several smaller compatible masks and a selector which selects between the smaller masks. In this way the computation of a large aperiodic mask is replaced by the computation of several much smaller masks. Using this technique, watermarks may be embedded for encrypting information in such a way that the quality of the image is not compromised.
摘要翻译： 用于半色调的方法和设备利用具有比掩码本身小得多的存储器要求的真正的非周期性掩模。 掩模由几个更小的兼容掩模和选择器构成，该选择器在较小的掩模之间进行选择。 以这种方式，通过几个更小的掩模的计算来代替大的非周期性掩模的计算。 使用这种技术，可以嵌入水印以加密信息，使得图像的质量不受损害。
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公开(公告)号：US5917951A
公开(公告)日：1999-06-29
申请号：US943881
申请日：1997-10-03
CPC分类号： H04N1/405 , H04N1/4051
摘要： A technique combines most of the advantages of both blue noise and clustering in generating a clustered aperiodic mask and using it in a dither array algorithm for halftoning. The method of halftoning of grey scale images utilizes a pixel-by-pixel comparison of the image against a clustered aperiodic mask in which the clustered aperiodic mask is comprised of a partly random and partly deterministic single valued function which is designed to produce visually pleasing dot configurations when thresholded at any level of grey.
摘要翻译： 一种技术将蓝噪声和聚类的大多数优点结合在生成聚类非周期性掩模中，并将其用于抖动阵列算法进行半色调处理。 灰度图像的半色调的方法利用图像与聚集的非周期性掩模的逐像素比较，其中聚集的非周期性掩模由部分随机和部分确定性的单值函数组成，其被设计为产生视觉上令人满意的点 在任何灰度级别进行阈值处理时的配置。
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公开(公告)号：US5946455A
公开(公告)日：1999-08-31
申请号：US942624
申请日：1997-10-02
申请人： Charles P. Tresser , Chai Wah Wu
发明人： Charles P. Tresser , Chai Wah Wu
CPC分类号： H04N1/4053
摘要： A printing method and apparatus takes into account the errors in the amount of black due to dot shape and size at the pixel where these errors occur, propagates corrections of these errors in order to preserve the logics of error diffusion, and permits a trade-off between completeness of the correction and computational time. The method and apparatus corrects for the actual shape of the printer dots in most error diffusion methods usable in digital halftoning.
摘要翻译： 打印方法和装置考虑到由于这些错误发生的像素处的点形状和大小引起的黑色量的误差，传播这些误差的校正以保持误差扩散的逻辑，并且允许权衡 在校正的完整性和计算时间之间。 该方法和装置在可用于数字半色调的大多数误差扩散方法中校正打印机点的实际形状。
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公开(公告)号：US07215445B2
公开(公告)日：2007-05-08
申请号：US11145968
申请日：2005-06-07
申请人： Gordon W. Braudaway , Frank P. Giordano , Marco Martens , Charles P. Tresser , Chai Wah Wu , Charles A. Micchelli
发明人： Gordon W. Braudaway , Frank P. Giordano , Marco Martens , Charles P. Tresser , Chai Wah Wu , Charles A. Micchelli
IPC分类号： G06K15/00
CPC分类号： G06K9/3283 , H04N1/00002 , H04N1/00045 , H04N1/0005 , H04N1/00082 , H04N1/00087 , H04N1/00092 , H04N2201/0434
摘要： Pages of books are copied without distortion due to curvature of the page near the book binding or the distortion in a copied page is corrected using the spacing of equidistant bars on tape strips applied to the top and bottom edges of a page before copying. The tape is preferably transparent and rather narrow and easily attached to a page to be copied. The first step in the distortion correction procedure is to locate the bars at the top and bottom of the page. The distortion of the spacing between the imaged bars is computed based on the known distance between the equidistant bars. The computed distortion of the spacing is then input to a distortion correction algorithm. The output of the distortion correction algorithm generates a corrected image. This image may also optionally delete the bars so that they are not printed in the copy. The corrected image is then copied.
摘要翻译： 书籍的页面由于书籍装订附近的页面的曲率而被复制而不会变形，或者使用应用于复印之前的页面的顶部和底部边缘上的带条上的等距条形的间距来校正复印页面中的失真。 胶带优选是透明的并且相当窄并且容易地附着到要复印的页面上。 失真校正过程的第一步是将页面的顶部和底部定位。 基于等距棒之间的已知距离来计算成像条之间的间距的变形。 然后将计算的间隔的失真输入到失真校正算法。 失真校正算法的输出产生校正图像。 该图像还可以选择性地删除条形，使得它们不被打印在副本中。 然后复制校正的图像。
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公开(公告)号：US06954290B1
公开(公告)日：2005-10-11
申请号：US09708517
申请日：2000-11-09
申请人： Gordon W. Braudaway , Frank P. Giordano , Marco Martens , Charles P. Tresser , Chai Wah Wu , Charles A. Micchelli
发明人： Gordon W. Braudaway , Frank P. Giordano , Marco Martens , Charles P. Tresser , Chai Wah Wu , Charles A. Micchelli
CPC分类号： G06K9/3283 , H04N1/00002 , H04N1/00045 , H04N1/0005 , H04N1/00082 , H04N1/00087 , H04N1/00092 , H04N2201/0434
摘要： Pages of books are copied without distortion due to curvature of the page near the book binding or the distortion in a copied page is corrected using the spacing of equidistant bars on tape strips applied to the top and bottom edges of a page before copying. The tape is preferably transparent and rather narrow and easily attached to a page to be copied. The first step in the distortion correction procedure is to locate the bars at the top and bottom of the page. The distortion of the spacing between the imaged bars is computed based on the known distance between the equidistant bars. The computed distortion of the spacing is then input to a distortion correction algorithm. The output of the distortion correction algorithm generates a corrected image. This image may also optionally delete the bars so that they are not printed in the copy. The corrected image is then copied.
摘要翻译： 书籍的页面由于书籍装订附近的页面的曲率而被复制而不会变形，或者使用应用于复印之前的页面的顶部和底部边缘上的带条上的等距条形的间距来校正复印页面中的失真。 胶带优选是透明的并且相当窄并且容易地附着到要复印的页面上。 失真校正过程的第一步是将页面的顶部和底部定位。 基于等距棒之间的已知距离来计算成像条之间的间距的变形。 然后将计算的间隔的失真输入到失真校正算法。 失真校正算法的输出产生校正图像。 该图像还可以选择性地删除条形，使得它们不被打印在副本中。 然后复制校正的图像。
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公开(公告)号：US06397334B1
公开(公告)日：2002-05-28
申请号：US09213179
申请日：1998-12-17
申请人： Timothy Joseph Chainer , Claude A. Greengard , Paul Andrew Moskowitz , Alejandro Gabriel Schrott , Charles P. Tresser , Robert Jacob von Gutfeld , Chai Wah Wu
发明人： Timothy Joseph Chainer , Claude A. Greengard , Paul Andrew Moskowitz , Alejandro Gabriel Schrott , Charles P. Tresser , Robert Jacob von Gutfeld , Chai Wah Wu
IPC分类号： H04L900
CPC分类号： H04N1/32101 , G01S17/88 , G06Q40/08 , H04N1/00342 , H04N2201/0084 , H04N2201/3233 , H04N2201/327
摘要： A system and method for authenticating an image of an object, include at least one identifier associated with the object, a receiver for interrogating the at least one identifier to produce identification information, a camera system for recording an image from the object including the at least one identifier, and a composite generator for encoding the identification information from the receiver along with the image acquired by the camera system, to produce composite data.
摘要翻译： 用于认证对象的图像的系统和方法包括与对象相关联的至少一个标识符，用于询问所述至少一个标识符以产生识别信息的接收机，用于从所述对象中记录包括至少 一个标识符和一个复合发生器，用于对来自接收机的识别信息以及由照相机系统获取的图像进行编码，以产生复合数据。
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公开(公告)号：US07100050B1
公开(公告)日：2006-08-29
申请号：US09571359
申请日：2000-05-15
申请人： Don Coppersmith , Frederick C. Mintzer , Charles P. Tresser , Samuel M. Weber , Chai Wah Wu , Minerva Ming-Yee Yeung
发明人： Don Coppersmith , Frederick C. Mintzer , Charles P. Tresser , Samuel M. Weber , Chai Wah Wu , Minerva Ming-Yee Yeung
CPC分类号： G06T1/0064 , H04N1/32144 , H04N1/32213 , H04N1/32309 , H04N21/23892 , H04N21/8358 , H04N2201/3214 , H04N2201/3215 , H04N2201/3225 , H04N2201/3226 , H04N2201/3233 , H04N2201/3235 , H04N2201/327
摘要： A watermarking scheme is provided that allows the watermarked image to be authenticated by an authentication agent without revealing the human-readable content of the image. There is disclosed an approach that combines privacy control with watermarking and authentication mechanisms. The watermark can be made to be imperceptible to humans. Public key cryptography allows the authentication agent to authenticate without being able to watermark an image. Watermark information may also be encoded in a vector graphics image that includes at least one stroke defined by coordinate values of an ordered sequence of points. This may be obtained by providing watermark information as a bit sequence, identifying one or more redundant properties of the image, modifying the redundant properties based upon the bit sequence to generate a representation of the image and storing the representation of the image for subsequent use.
摘要翻译： 提供了一种水印方案，其允许水印图像由认证代理认证，而不暴露图像的人可读内容。 公开了一种将隐私控制与水印和认证机制相结合的方法。 水印可以被人看不到。 公共密钥加密允许认证代理进行身份验证，而无法对图像进行水印。 水印信息也可以被编码在矢量图形图像中，该矢量图形图像包括由有序序列的坐标值定义的至少一个笔画。 这可以通过提供水印信息作为比特序列，识别图像的一个或多个冗余属性，基于比特序列修改冗余属性来生成图像的表示并存储用于后续使用的图像的表示来获得。
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