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    • 1. 发明授权
    • Method and device for processing and watermarking a set of coefficients representing a digital image
    • 用于处理和水印表示数字图像的一组系数的方法和装置
    • US06990213B2
    • 2006-01-24
    • US10041576
    • 2002-01-10
    • Ioana Donescu
    • Ioana Donescu
    • G06K9/00
    • G06T1/0064G06T2201/0052
    • The invention concerns a method of processing a set of coefficients representing a digital image (300) with a view to an insertion of at least one item of watermarking information in said image, this image being liable to undergo a set of geometric transformations and said coefficients being grouped together in regions, said method being characterized in that it includes a step (E220) of determining, amongst at least some of said regions, a set of so-called acceptable regions, adapted to receive said at least one item of watermarking information; and a step (E230) of sequencing, according to at least one predetermined criterion, at least one part of said set of acceptable regions, in an order which is invariant with respect to at least one of said geometric transformations.
    • 本发明涉及一种处理表示数字图像(300)的系数集合的方法,以便在所述图像中插入至少一个水印信息项,该图像易于经历一组几何变换,并且所述系数 在区域中被分组在一起,所述方法的特征在于,其包括步骤(E 220),其在至少一些所述区域中确定一组所谓的可接受区域,其适于接收所述至少一个水印项目 信息; 以及根据至少一个预定标准,以相对于所述几何变换中的至少一个不变的顺序对所述一组可接受区域的至少一部分进行排序的步骤(E 230)。
    • 2. 发明授权
    • Method and device for inserting a watermarking signal in an image
    • 用于在图像中插入水印信号的方法和装置
    • US06718045B2
    • 2004-04-06
    • US09756136
    • 2001-01-09
    • Ioana DonescuEric Nguyen
    • Ioana DonescuEric Nguyen
    • G06K900
    • H04N1/32187G06T1/0028G06T2201/0052H04N1/3217H04N19/10H04N19/14H04N19/176H04N19/467H04N19/48H04N19/63H04N19/94H04N2201/3233H04N2201/327
    • A method of inserting a watermarking signal (w) in a set (X) of coefficients (Xi) representing a digital image (I), in which at least one subset of coefficients is modified by said watermarking signal (w), comprises, for each representative coefficient (Xi) to be modified, a step of determining a neighborhood (V(Xi)) of the representative coefficient (Xi) to be modified, in the image (I); a step of selecting a neighborhood (Vsimd) in a dictionary of neighborhoods representing coefficients representing the image (I), according to a predetermined criterion of similarity with the neighborhood (V(Xi)) of the representative coefficient (Xi) under consideration; and a step of modifying the representative coefficient (Xi) as a function of the watermarking signal (w) and a predetermined masking data item (M(Vsimd)) representing the masking effect on a watermarking signal, of the neighborhood (Vsimd) selected in the dictionary.
    • 一种在表示数字图像(I)的系数(X)的集合(X)中插入水印信号(w)的方法,其中通过所述水印信号(w)修改系数的至少一个子集包括:对于 要修改的每个代表系数(Xi);在图像(I)中确定要修改的代表系数(Xi)的邻域(V(Xi))的步骤; 根据与代表系数(Xi)的邻域(V(Xi))的相似度的预定标准,在代表表示图像(I)的系数的邻域的字典中选择邻域(Vsim )的步骤, 考虑; 以及修改作为水印信号(w)的函数的代表系数(Xi)和表示邻域的水印信号的掩蔽效应的预定掩蔽数据项(M(Vsim d))的步骤(Vsim )。
    • 4. 发明授权
    • Insertion of supplementary information in digital data
    • 在数字数据中插入补充信息
    • US07499546B2
    • 2009-03-03
    • US10415500
    • 2001-10-31
    • Ioana DonescuPatrice Onno
    • Ioana DonescuPatrice Onno
    • H04N7/167
    • H04N1/32101H04N1/32128H04N1/32154H04N1/3217H04N1/32277H04N2201/3233H04N2201/328
    • The invention concerns a method of inserting a suppementary information item in a set of data reprenting physical quantities, the data having been processed by the steps of, a) partitioning (E2) the set into subsets, b) entropic coding (E4) of each of the subsets, c) selecting (E8), for each of the subsets, a compression rate and distortion pair according to a global compression rate or a global distortion, d) writing, for each of the subsets, an index (Tij) representing the selected compression rate and distortion pair, in a file containing the coded subsets, characterised in that it also includes a step (E11) of modifying the selected compression rate and distortion pairs, according to the supplementary information (wm).
    • 本发明涉及一种将重复信息项插入到一组重复物理量的数据中的方法,该数据已经通过以下步骤进行处理:a)将集合划分成(E2)子集,b)每个子集的熵编码(E4) 的子集,c)根据全局压缩率或全局失真,为每个子集选择(E8)压缩率和失真对,d)为每个子集写入表示(E8)的索引(Tij) 所选择的压缩率和失真对,在包含编码子集的文件中,其特征在于还包括根据补充信息(wm)修改所选压缩率和失真对的步骤(E11)。
    • 6. 发明授权
    • Insertion and extraction of a message in an image
    • 在图像中插入和提取消息
    • US07330560B2
    • 2008-02-12
    • US10461416
    • 2003-06-16
    • Ioana Donescu
    • Ioana Donescu
    • G06K9/00H04L9/00
    • H04N19/467G06T1/0064G06T2201/0051H04N1/32149H04N1/32187H04N1/32229
    • The invention concerns a method of inserting a message in an image, characterized in that it comprises the steps of: selecting a set of points in the image as a function of predetermined criteria, so as to form a coordinate system in the image, calculating (S21) an affine transformation between a predetermined coordinate system and the coordinate system formed in the image, generating (S24) a pseudo-random sequence for each symbol of the message to be inserted, in the predetermined coordinate system, projecting (E25) each pseudo-random sequence into the coordinate system formed in the image, by affine transformation, inserting (S27) each symbol of the message to be inserted, as a function of its respective projected pseudo-random sequence.
    • 本发明涉及一种在图像中插入消息的方法,其特征在于包括以下步骤:根据预定标准选择图像中的一组点,以便在图像中形成坐标系,计算( S 21)在预定坐标系和形成在图像中的坐标系之间的仿射变换,在预定坐标系中生成(S24)要插入的消息的每个符号的伪随机序列(E 25 )每个伪随机序列转换成图像中形成的坐标系,通过仿射变换,将要插入的消息的每个符号插入(S27)作为其各自的投影伪随机序列的函数。