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    Method and apparatus for implementing occlusion glyph code tilings
    31.
    发明公开
    Method and apparatus for implementing occlusion glyph code tilings 审中-公开
    Methode und Vorrichtung zur Realisierung einer ZeichencodeTäfelungmitEinschlüssen

    公开(公告)号：EP1217579A2

    公开(公告)日：2002-06-26

    申请号：EP01130197.5

    申请日：2001-12-19

    Applicant: Xerox Corporation

    Inventor： Hecht, David L. ,  Petrie, Glen W. ,  Flores, Noah L. ,  Gorbet, Matthew G.

    IPC: G06K19/06

    CPC classification number: G06K7/143 ,  G06K7/1417 ,  G06K19/06037

    Abstract: An embedded data code comprises periodic tiles having occlusions. In one embodiment, each tile is comprised of glyphs encoding a first code system. The occlusions are comprised of information, such as glyphs encoding a second code system, graphics, or text. The occlusions may occur periodically in each tile. A reading device may be used to capture an image of a portion of the substrate that includes a tile. A processor then analyzes the image to determine the tile code pattern and decode the tiled code.

    Abstract translation: 嵌入式数据代码包括具有闭塞的周期性瓦片。 在一个实施例中，每个瓦片包括编码第一代码系统的字形。 遮挡由信息组成，例如编码第二代码系统的图形，图形或文本。 闭塞可能在每个瓦片中周期性地发生。 读取装置可以用于捕获包括瓦片的基板的一部分的图像。 然后处理器分析图像以确定瓦片码模式并解码平铺码。

    Method of providing user interface
    32.
    发明公开
    Method of providing user interface 审中-公开
    提供用户界面的方法

    公开(公告)号：EP1215617A2

    公开(公告)日：2002-06-19

    申请号：EP01310477.3

    申请日：2001-12-14

    Applicant: Xerox Corporation

    Inventor： Hecht, David L. ,  Petrie, Glen W. ,  Flores, Noah L. ,  Gorbet, Matthew G.

    IPC: G06K7/14

    CPC classification number: G06K7/143 ,  G06F3/002 ,  G06K7/14 ,  G06K19/06037

    Abstract: Apparatus, methods, and articles of manufacture consistent with the present invention provide a user interface for data processing systems wherein occlusion glyph code tilings (21) are used to facilitate the accurate extraction of user selection information from a substrate while presenting user interface graphics to the user. The tiled code system in the present invention is comprised of tiles, with tiled code regions and occlusion regions (M Occlusion). In one embodiment, a first tiled code system facilitates robust decoding of the substrate with a suitable image capture. The occlusions are comprised of user interface graphics for user selection and information, such as glyphs encoding a second code system. The occlusion regions occur periodically in each tile. The tiled code pattern can be used to implement a graphical user interface. A user uses a selection device to capture an image of a portion of the substrate that includes portions of tiled codes to complete a tile. The image is analyzed to determine the tile code pattern. A context code is determined from the tiled code pattern, and a selection code is determined from the occlusion information in the image. The context code and selection code are then processed by a syntax processor. Based on a selection or series of selections by a user, the syntax processor sends commands to the system.

    Abstract translation: 与本发明一致的设备，方法和制造品提供了用于数据处理系统的用户界面，其中使用遮挡字形代码分段（21）来促进从基底精确提取用户选择信息，同时将用户界面图形呈现给 用户。 本发明中的平铺代码系统由平铺代码区域和遮挡区域（M遮挡）组成。 在一个实施例中，第一平铺代码系统利用合适的图像捕获有助于对衬底的鲁棒解码。 遮挡包括用户选择和信息的用户界面图形，例如编码第二代码系统的字形。 遮挡区域在每个瓦片中周期性地发生。 平铺代码模式可用于实现图形用户界面。 用户使用选择设备来捕获包括平铺代码的部分以完成瓦片的基板的一部分的图像。 分析图像以确定图块代码图案。 从平铺代码模式确定上下文代码，并从图像中的遮挡信息确定选择代码。 上下文代码和选择代码然后由语法处理器处理。 基于用户的选择或一系列选择，语法处理器向系统发送命令。

    Systems and method for policy based printing and forgery detection
    33.
    发明公开
    Systems and method for policy based printing and forgery detection 有权
    系统与Verfahren zum regelbasierenden Ausdrucken undFälschungsberurteilung

    公开(公告)号：EP1209897A2

    公开(公告)日：2002-05-29

    申请号：EP01309647.4

    申请日：2001-11-15

    Applicant: Xerox Corporation

    Inventor： Lunt, Teresa F. ,  Hecht, David L. ,  Franklin, Matthew K. ,  Berson, Thomas A. ,  Stefik, Mark J. ,  Bell, Alan G. ,  R. Drews, Dean ,  Breuel, Thomas M. ,  Cass, Todd ,  Greene, Daniel H. ,  Curry, Douglas N. ,  Krivacic, Robert T.

    IPC: H04N1/32

    CPC classification number: H04N1/32523 ,  G06T1/0021 ,  G06T2201/0064 ,  H04N1/32101 ,  H04N1/32144 ,  H04N2201/0082 ,  H04N2201/324 ,  H04N2201/3246 ,  H04N2201/327

    Abstract: A print management system includes a policy (113) that determines a protection level for a document to be printed. The document is printed using forgery detection and deterrence technologies, such as fragile and robust watermarks, glyphs, and digital signatures, that are appropriate to the level of protection determined by the policy. A plurality of printers (130) are managed by a print management system (112). Each printer (130) can provide a range of protection technologies. The policy determines the protection technologies for the document to be printed. The print management system (112) routes the print job to a printer (130) that can apply the appropriate protections and sets the appropriate parameters in the printer. Copy evidence that can establish that a document is a forgery and/or tracing information that identifies the custodian of the document and restrictions on copying of the document and use of the information in the document are included in the watermark that is printed on the document. A document can be verified as an original or established as a forgery by inspecting the copy evidence and/or tracing information in the watermark.

    Abstract translation: 打印管理系统包括确定要打印的文档的保护等级的策略（113）。 该文件使用伪造检测和威慑技术打印，例如脆弱和鲁棒的水印，字形和数字签名，这些技术适用于由策略确定的保护级别。 多个打印机（130）由打印管理系统（112）管理。 每个打印机（130）可以提供一系列保护技术。 该策略确定要打印的文档的保护技术。 打印管理系统（112）将打印作业路由到可以应用适当保护的打印机（130），并将适当的参数设置在打印机中。 复印证明文件是伪造和/或跟踪信息，标识文件的保管人，复制文件的限制和文档中的信息的使用被包含在打印在文档上的水印中。 文档可以通过检查水印中的复制证据和/或跟踪信息来验证为原件或伪造成伪造。

    Dynamic equalization for multichannel optical imaging systems
    36.
    发明公开
    Dynamic equalization for multichannel optical imaging systems 失效
    多通道光学成像系统的动态均衡

    公开(公告)号：EP0434449A3

    公开(公告)日：1992-05-13

    申请号：EP90314087.9

    申请日：1990-12-21

    Applicant: XEROX CORPORATION

    Inventor： Sprague, Robert A. ,  Turner, William D. ,  Kowalski, Robert P. ,  Hecht, David L.

    IPC: H04N1/40

    CPC classification number: H04N1/4015 ,  G06K15/027 ,  G06K15/12 ,  G06K15/1247 ,  G06K15/1261 ,  G06K15/1271

    Abstract: Provision is made for equalizing the optical channels (12a to 12i) of multichannel optical imaging systems (11) dynamically while the imaging systems are idle (i. e., not printing). To that end, the output intensities of the channels are sampled (32) at a predetermined resolution of n channels/measurement, where n is an integer selected from a range 1, 2,... N/2, and N is the total number of channels contained by the imaging system, for providing a calibrated reference intensity for the imaging system and for then determining correction factors (36) for the respective channels or groups of channels to equalize them to that reference intensity. To minimize the effect of defective channels on the channel balance that is achieved, any n d channels which are found to have a nominal, uncorrected output intensity level below a predetermined percentage of a system-wide average maximum output intensity level are ignored (Fig. 12) while calibrating the reference intensity for the imaging system. Advantageously, the correction factors are recursively computed through the use of an iterative process (121, Fig. 14).

    Bandwidth reduced multi-pass writing of variable gray level digital images
    37.
    发明公开
    Bandwidth reduced multi-pass writing of variable gray level digital images 失效
    可变灰度级数字图像的带宽减少多重写入

    公开(公告)号：EP0375431A3

    公开(公告)日：1991-10-23

    申请号：EP89313453.6

    申请日：1989-12-21

    Applicant: XEROX CORPORATION

    Inventor： Hecht, David L. ,  Sprague, Robert A.

    IPC: H04N1/40 ,  H04N1/036 ,  H04N1/41

    CPC classification number: H04N1/40037

    Abstract: User-viewable renderings of variable gray level images composed of pixels represented by binary coded codewords are written on a suitable recording medium by one or more pixel generators which have their write responses code matched to the codewords. More particularly, the write responses of the pixel generators (22 a -----) are "code matched" to the codewords by cyclically and bit synchronously stepping them through a series of gray-­scale values which are selected to substantially match the binary weights of the respective bits of the codewords. Such code matched pixel generators are selectively write enabled and disabled in response to the logic levels of the successive bits of the codewords that are applied to them, whereby the binary weighted writes any of them performs in response to a given codeword spatially sum to form a pixel having approximately the same gray-­scale value as the given codeword.

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