首页> 外国专利> METHOD FOR SECURING AN IMAGE BY MEANS OF GRAPHICAL ANTI-COUNTERFEITING MEANS, METHOD FOR SECURING AN IDENTIFICATION DOCUMENT, AND SECURE IDENTIFICATION DOCUMENT

METHOD FOR SECURING AN IMAGE BY MEANS OF GRAPHICAL ANTI-COUNTERFEITING MEANS, METHOD FOR SECURING AN IDENTIFICATION DOCUMENT, AND SECURE IDENTIFICATION DOCUMENT

机译:利用图形化的防伪手段对图像进行处理的方法,对证明文件进行保护的方法以及安全对证文件

摘要

The invention relates to a method for securing a first image by means of graphical anti-counterfeiting means and to a method for securing an identification document with such graphical anti-counterfeiting means. The invention also relates to a secure identification document that allows detecting either a fraudulent modification of the existing personalization or a fraudulent falsified document. For that, graphical anti-counterfeiting image is inserted into an identification image, each image being defined by a plurality of pixels. The characteristic level (for example grey level) of each pixel i of the graphical anti-counterfeiting image is linked, by a function F, to a matrix Ωi of pixels defined in the identification image, said pixels of the matrix Ωi surrounding the location i of a pixel of the graphical anti-counterfeiting image, said function F taking into account the characteristic level (for example average grey level) G(Ωi) and the texture level T(Ωi) of said matrix Ωi.
机译:用于通过图形防伪手段保护第一图像的方法技术领域本发明涉及一种用于通过图形防伪手段保护第一图像的方法以及一种利用这种图形防伪手段保护身份文件的方法。本发明还涉及一种安全识别文件,该文件允许检测对现有个性化的欺诈性修改或欺诈性的伪造文件。为此,将图形防伪图像插入识别图像中,每个图像由多个像素定义。图形防伪图像的每个像素i的特征级(例如灰度级)通过函数F链接到识别图像中定义的像素矩阵Ωi,矩阵Ωi的所述像素围绕位置i对于图形防伪图像的像素,所述函数F考虑了所述矩阵Ωi的特征水平(例如平均灰度)G(Ωi)和纹理水平T(Ωi)。

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