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公开(公告)号：US20050067489A1
公开(公告)日：2005-03-31
申请号：US10941059
申请日：2004-09-13
申请人： Robert Jones , Alastair Reed
发明人： Robert Jones , Alastair Reed
CPC分类号： B42D25/378 , B41M3/144 , B42D25/00 , B42D25/23 , B42D25/382 , B42D25/387 , B42D25/41 , G07D7/0043 , G07D7/12 , G07D7/1205 , G07D7/206 , G07F7/08 , G07F7/125
摘要： The present invention provides an emerging security or authentication feature for identification documents and other objects. The security feature is constructed using two differently emission-decaying inks. The inks are arranged so as to convey a first pattern when they are both exited. A second pattern emerges as a first and more rapidly decaying ink decays, but while a second and relatively longer decaying ink still provides emissions. The second pattern can be alphanumeric characters, a barcode, a pattern that will yield a predictable frequency domain representation, a digital watermark, etc. In one implementation, the first pattern is a first machine-readable code and the second pattern is a second, different machine-readable code.
摘要翻译： 本发明提供了用于识别文档和其他对象的新兴安全或认证特征。 安全特征使用两种不同的发射衰减墨水构成。 油墨被布置成当它们都退出时传送第一图案。 第二种模式作为第一个也是更快速衰减的墨水衰变出现，但是第二个相对较长的衰变墨水仍然提供排放。 第二模式可以是字母数字字符，条形码，将产生可预测的频域表示的模式，数字水印等。在一个实现中，第一模式是第一机器可读代码，第二模式是第二模式， 不同的机器可读代码。
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公开(公告)号：US4941185A
公开(公告)日：1990-07-10
申请号：US253913
申请日：1988-10-06
申请人： Alastair Reed
发明人： Alastair Reed
IPC分类号： H04N1/40
CPC分类号： H04N1/40075
摘要： A method and apparatus for processing a first (e.g. half-tone) image constituted by a second (e.g. continuous tone) image convolved with a periodic (screen) function, to produce the second image is described. The invention is particularly suited to handling digitally represented half-tone images. The apparatus comprises a microcomputer (17) for determining digital data defining a frequency filter characteristic adapted to suppress the frequency or frequencies of the periodic function. A fast Fourier transform circuit (11) transforms the image data into the frequency domain and a multiplier (12) multiplies the transformed data by the frequency characteristic stored in a store (13). The resultant multiplied data is inversely transformed back into the image of spatial domain by a fast Fourier transform circuit (14) to generate the second image.
摘要翻译： 描述用于处理由周期性（屏幕）功能卷积的第二（例如连续色调）图像构成的第一（例如半色调）图像以产生第二图像的方法和装置。 本发明特别适用于处理数字表示的半色调图像。 该装置包括微型计算机（17），用于确定定义适合于抑制周期性函数的频率或频率的频率滤波特性的数字数据。 快速傅里叶变换电路（11）将图像数据变换为频域，乘法器（12）将经变换的数据乘以存储在存储器（13）中的频率特性。 所得到的相乘数据通过快速傅立叶变换电路（14）逆向变换回空间域的图像，以产生第二图像。
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公开(公告)号：US4922544A
公开(公告)日：1990-05-01
申请号：US94773
申请日：1987-09-10
申请人： Peter W. Stansfield , Alastair Reed
发明人： Peter W. Stansfield , Alastair Reed
CPC分类号： H04N11/044 , H04N1/648 , H04N19/62 , H04N19/649
摘要： A method and apparatus for processing original data defining the values of pixels of an original colored image represented in a spatial domain by two or more color separations each color separation defining the respective color component content of pixels arranged in a two dimensional array extending in X and Y directions. The apparatus comprises a store 6 for storing the original data; and a frequency transform circuit 8 for performing a three dimensional transformation on the store representation to generate transformed data representing the original image in three dimensional frequency space. Two of the three dimensions represent the variation in pixel value in the X direction and the Y direction respectively and the transformed data has a single zero order frequency term.
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公开(公告)号：US4907096A
公开(公告)日：1990-03-06
申请号：US226693
申请日：1988-08-01
申请人： Peter W. Stansfield , Alastair Reed
发明人： Peter W. Stansfield , Alastair Reed
CPC分类号： H04N1/40075
摘要： A method and apparatus for processing a screened separation comprises an analyze scanner for scanning the separation at a resolution higher than the screen ruling to generate a binary value for each high resolution pixel of the separation; a processor for generating signals representing single values for respective blocks of the high resolution pixels from the binary data in the blocks; and a descreening system to which the signals from the processor are fed, the descreening system generating signals representing a descreened version of the original separation.
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公开(公告)号：US20080013801A1
公开(公告)日：2008-01-17
申请号：US11765987
申请日：2007-06-20
申请人： Alastair Reed , Brett Bradley
发明人： Alastair Reed , Brett Bradley
IPC分类号： G06K9/00
CPC分类号： G06K9/40 , G06K9/00885
摘要： The present invention relates generally to pre-processing images, audio and/or video to improve biometric analysis from such. In one implementation, a method is provided including: receiving a color digital image including a representation of a human subject; converting the color digital image into grayscale values; transforming at least one representation of the converted color image; analyzing the transformed, converted color image to identify artifacts; if artifacts are found, processing the color digital image to reduce the artifacts; and providing the processed digital image to a biometric system. Other implementations are provided as well.
摘要翻译： 本发明一般涉及预处理图像，音频和/或视频以改善生物特征分析。 在一个实现中，提供了一种方法，包括：接收包括人类对象的表示的彩色数字图像; 将彩色数字图像转换为灰度值; 转换所转换的彩色图像的至少一个表示; 分析转换后的彩色图像，以识别人为因素; 如果发现伪像，则处理彩色数字图像以减少伪影; 并将经处理的数字图像提供给生物测定系统。 还提供其他实现。
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公开(公告)号：US20060002583A1
公开(公告)日：2006-01-05
申请号：US11143088
申请日：2005-06-01
申请人： Alastair Reed , Brett Bradley
发明人： Alastair Reed , Brett Bradley
IPC分类号： G06K9/00
CPC分类号： G06T1/005 , G06T1/0021 , G06T11/001 , G06T2201/0083 , H04N1/32144 , H04N1/32267 , H04N1/32309 , H04N1/6005 , H04N1/6008 , H04N2201/3228 , H04N2201/3233 , H04N2201/327
摘要： THE present invention relates to steganography and digital watermarking. In one implementation, we provide a method to analyze a digital image to determine whether the digital image will be a suitable host to receive steganographic encoding or digital watermarking. Suitability is determined, at least in part, by analyzing the digital image relative to an expected workflow process through which a watermarked version of the digital image is expected to flow through. Our methods and systems determine whether the digital image forms a suitable host to receive digital watermarking relative to the expected workflow process. If the digital image is not suitable, the digital image is modified to better receive digital watermarking in anticipation of the expected workflow process.
摘要翻译： 本发明涉及隐写术和数字水印。 在一个实现中，我们提供一种分析数字图像以确定数字图像是否是适合的主机以接收隐写编码或数字水印的方法。 至少部分地通过分析数字图像相对于期望的数字图像的水印版本流过的预期工作流程来确定适合性。 我们的方法和系统确定数字图像是否形成相对于预期工作流程接收数字水印的合适主机。 如果数字图像不合适，则数字图像被修改为更好地接收数字水印，以期望预期的工作流程。
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公开(公告)号：US20050134918A1
公开(公告)日：2005-06-23
申请号：US10954632
申请日：2004-09-29
申请人： Alastair Reed
发明人： Alastair Reed
CPC分类号： H04N1/4078
摘要： A test pattern printed by a printer is assessed—without colorimetric equipment—to provide data used in recalibrating the printer. The assessment may be made by an unskilled operator, and can include discerning whether a particular pattern is visible in the printed test pattern, or whether a feature in the test pattern is relatively wider or narrower. From such assessment, needed changes to the printer's calibration data are inferred and implemented. A variety of other printer calibration techniques are disclosed. The technology is illustrated in the context of dye sublimation printers, and is particularly useful in optimizing printing of digitally-watermarked graphics.
摘要翻译： 评估打印机打印的测试图案，而不使用比色设备，以提供用于重新校准打印机的数据。 评估可以由不熟练的操作者进行，并且可以包括识别特定图案在打印的测试图案中是否可见，或者测试图案中的特征是否相对较宽或更窄。 从这样的评估，推测和实施打印机校准数据的所需更改。 公开了各种其他打印机校准技术。 该技术在染料升华打印机的上下文中被说明，并且对于优化数字水印图形的打印特别有用。
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公开(公告)号：US4965754A
公开(公告)日：1990-10-23
申请号：US176588
申请日：1988-04-01
申请人： Peter W. Stansfield , Alastair Reed
发明人： Peter W. Stansfield , Alastair Reed
CPC分类号： H04N1/41
摘要： A method and apparatus for processing digital data representing the color content of abutting blocks of pixels defining an image. The method comprises, for each block(i) determining a measure of the variation in color content of pixels in the block; and,(ii) if the variation lies within a predetermined range, applying a compression algorithm to the digital data defining the block.
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公开(公告)号：US4947260A
公开(公告)日：1990-08-07
申请号：US366982
申请日：1989-06-16
申请人： Alastair Reed , Peter W. Stansfield , Martin Rosen
发明人： Alastair Reed , Peter W. Stansfield , Martin Rosen
CPC分类号： G06T3/4007 , H04N1/3872
摘要： A method of generating a composite image on a record medium at a first resolution resulting from two subsidiary images defined by pixels at a second resolution lower than the first. The method comprises generating an array of control data at the second resolution, the control data indicating the relative locations of the subsidiary images in the composite image at the first and second resolutions, generating data defining the composite image at the second resolution under the control of the control data, interpolating the second resolution composite image up to the first resolution, the relative locations of the subsidiary images at the first resolution being determined in accordance with the control data, and causing the first resolution composite image to be recorded on the record medium.
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20.发明授权Reproduction of colored images including overprinting for reproduction of bright colors 失效复制彩色图像，包括重印明亮色彩的套印
公开(公告)号：US4774567A
公开(公告)日：1988-09-27
申请号：US97011
申请日：1987-09-16
申请人： Peter W. Stansfield , Alastair Reed
发明人： Peter W. Stansfield , Alastair Reed
CPC分类号： H04N1/54
摘要： In color printing it is customary to print images in a combination cyan, magneta, and yellow printing inks. However, it is sometimes required in the printing of the final image, to include an ink of a special color, for example a brown ink, which cannot be reproduced by combining cyan, magenta and yellow inks. The present invention is concerned with the preparation of a special color printer for a special printing ink. According to the invention sets of values (C.sub.ROP, M.sub.ROP, Y.sub.ROP, K.sub.ROP) defining the characteristic elements of curves for cyan, magenta, yellow, and black, which curves together correspond to a range of values for the overprinted colored separation, are stored. For each picture element, a combination of color component values for cyan, magenta, yellow and black (C,M,Y,K) are derived and compared with different sets of values (C.sub.ROP, M.sub.ROP, Y.sub.ROP, K.sub.ROP) derived from the stored curve elements, each set corresponding to a different value of the overprinted special color separation (R.sub.OP). A value is selected for the desired special color separation for which each of the stored values of the related set (C.sub.ROP, M.sub.ROP, Y.sub.ROP, K.sub.ROP) is not greater than the corresponding value (C,M,Y,K) derived from the picture element of the original. The stored values (C.sub.ROP, M.sub.ROP, Y.sub.ROP, K.sub.ROP) are then subtracted from the corresponding values (C,M,Y,K) to get residual values (C',M',Y', K'). The residual values (C',M',Y',K') are then modified to give a corresponding set of modified values (C",M',Y',K') and a special color separation value (R) is selected which is overprinted to constitute the selected overprinted special color.
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