SYSTEMS AND METHODS FOR AUTHENTICATING OBJECTS USING MULTIPLE-LEVEL IMAGE ENCODING AND DECODING
    31.
    发明申请
    SYSTEMS AND METHODS FOR AUTHENTICATING OBJECTS USING MULTIPLE-LEVEL IMAGE ENCODING AND DECODING 审中-公开
    使用多级图像编码和解码来验证对象的系统和方法

    公开(公告)号:WO2006020553A3

    公开(公告)日:2006-06-08

    申请号:PCT/US2005028092

    申请日:2005-08-05

    Abstract: A method of producing a digital multiple-level encoded image (Fig. 7) is presented. The method comprises obtaining a digital authentication image (S110), obtaining a first encoding parameter set (S115) comprising one or more encoding parameters, and constructing a first encoded image (S125). The first encoded image is constructed using a first encoding methodology, the digital authentication image and the first encoding parameter set. The method further comprises obtaining a second encoding parameter set (S130) comprising one or more encoding parameters and constructing a second encoded image (140) using a second encoding methodology, the first encoded image and the second encoding parameter set. The second encoded image may be decoded to reveal the first encoded image using a decoder having characteristics corresponding to at least a portion of the encoding parameters of the second encoding parameter set. The first encoded image may be decoded to reveal the authentication image using a decoder having characteristics corresponding to at least a portion of the encoding parameters of the first encoding parameter set.

    Abstract translation: 提出了一种产生数字多级编码图像的方法(图7)。 该方法包括获得数字认证图像(S110),获得包括一个或多个编码参数的第一编码参数集(S115),以及构造第一编码图像(S125)。 使用第一编码方法,数字认证图像和第一编码参数集来构建第一编码图像。 该方法还包括获得包括一个或多个编码参数的第二编码参数集(S130),并使用第二编码方法,第一编码图像和第二编码参数组来构建第二编码图像(140)。 第二编码图像可以被解码以使用具有对应于第二编码参数集的编码参数的至少一部分的特征的解码器来显示第一编码图像。 第一编码图像可以被解码以使用具有对应于第一编码参数集的编码参数的至少一部分的特征的解码器来显示认证图像。

    DOCUMENT CONTAINING SECURITY IMAGES
    32.
    发明申请
    DOCUMENT CONTAINING SECURITY IMAGES 审中-公开
    包含安全图像的文件

    公开(公告)号:WO2004033229A2

    公开(公告)日:2004-04-22

    申请号:PCT/US0332159

    申请日:2003-10-09

    Inventor: WICKER THOMAS M

    Abstract: A document containing security images which enable original documents to be distinguished from copies of the originals. The document may include a background of a first color and an image formed of a second and third color which appear to be the first color when viewed together, providing a hidden image which does not appear in reproductions of the document. The document may contain a background of a first color printed with lines at a first angle, and an image of the first color but having lines printed at a different angle, providing a hidden image which does not appear in reproductions of the document. The document may contain a background of printed with lines at a first angle and a predetermined line frequency, and an image printed with lines at a second angle and at a line frequency less the one half of the line frequency of the background, providing a substantially hidden image which appears in a reproduction of the document. A document may be authenticated as an original document by detecting the presence of a predetermined hidden security image and/or by determining the layout of the document to be the same as the expected layout of an original document.

    Abstract translation: 包含安全图像的文档,可以将原始文档与原件的副本区分开来。 文档可以包括第一颜色的背景和由第二和第三颜色形成的图像,其在一起观看时看起来是第一种颜色,提供在文档的再现中不出现的隐藏图像。 文档可以包含以第一角度印刷线的第一颜色的背景和第一颜色的图像,但是以不同的角度印刷线,提供不出现在文档的再现中的隐藏图像。 文档可以包含用第一角度和预定线频率的线打印的背景,以及以比第二角度和线频率小的背景的线频率的一半的线路打印的图像,提供基本上 出现在文件再现中的隐藏图像。 可以通过检测预定隐藏的安全图像的存在和/或通过确定文档的布局与原始文档的预期布局相同来将文档认证为原始文档。

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