SYSTEMS AND METHODS FOR AUTHENTICATION OF PRINT MEDIA
    3.
    发明公开
    SYSTEMS AND METHODS FOR AUTHENTICATION OF PRINT MEDIA 有权
    VTEFAHREN ZUR AUTHENTIFIKATION VON DRUCKMEDIEN

    公开(公告)号:EP1579622A4

    公开(公告)日:2007-05-30

    申请号:EP03790079

    申请日:2003-11-26

    申请人: DIGIMARC CORP

    摘要: This disclosure describes methods for using embedded auxiliary signals in documents for copy detection and other applications. In an application, the auxiliary signal is formed as an array of elements selected from a set of print structures (106) with properties that change differently in response to copy operations. These changes in properties of the print structures that carry the embedded auxiliary signal are automatically detectable. The extent to which the auxiliary data is detected forms a detection metric used in combination with one or more other metrics to differentiate copies from originals. Robust and fragile watermarks are used in Image Replacement Documents for a variety of applications. Digital watermarks act as on-board mediators in authentication of a variety of printed documents. Finally, digital watermarks are used to help manage quality of the scanners used in imaging systems.

    摘要翻译: 本公开描述了在用于复制检测和其他应用的文档中使用嵌入式辅助信号的方法。 在应用中,辅助信号被形成为从一组打印结构(106)中选择的元素的阵列,其具有响应于复制操作而改变的属性。 携带嵌入式辅助信号的打印结构的属性的这些变化是可以自动检测的。 检测辅助数据的程度形成与一个或多个其他度量结合使用的检测度量,以区分副本与原件。 图像替换文档中使用了强大而脆弱的水印,用于各种应用。 数字水印作为各种印刷文件认证中的板载介质。 最后,数字水印用于帮助管理成像系统中使用的扫描仪的质量。

    ENVELOPES AND PRINTED DOCUMENTS EMPLOYING DIGITAL WATERMARKS, AND RELATED METHODS
    4.
    发明公开
    ENVELOPES AND PRINTED DOCUMENTS EMPLOYING DIGITAL WATERMARKS, AND RELATED METHODS 审中-公开
    UMSCHLÄGEUND GEDRUCKTE DOKUMENTE MIT DIGITALEN WASSERZEICHEN UND DAMITZUSAMMENHÄNGENDEVERFAHREN

    公开(公告)号:EP1552441A4

    公开(公告)日:2005-11-23

    申请号:EP01933210

    申请日:2001-05-08

    申请人: DIGIMARC CORP

    摘要: Digital watermarks are encoded on envelopes to serve a variety of purposes related to postage (franking), anti-counterfeiting, addressing, and linking to associated internet sites. Digital watermarks can also be formed on blank paper stock so that printed documents formed therewith have desired properties, including the ability to distinguish photocopies from originals, to link to corporate web sites, and to permit document serialization for tracing and other purposes.

    摘要翻译: 数字水印在信封上编码,用于与邮资(盖章),防伪,寻址和链接到相关的互联网站点有关的各种目的。 数字水印也可以形成在空白纸张上,以使由其形成的印刷文件具有期望的特性,包括区分复印件与原件的能力,链接到公司网站,以及允许文件序列化用于追踪和其他目的。