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    DOCUMENT PROCESSING APPARATUS AND DOCUMENT PROCESSING METHOD
    82.
    发明申请
    DOCUMENT PROCESSING APPARATUS AND DOCUMENT PROCESSING METHOD 有权
    文件处理装置和文件处理方法

    公开(公告)号：US20100103470A1

    公开(公告)日：2010-04-29

    申请号：US12604475

    申请日：2009-10-23

    Applicant: Koji Harada

    Inventor： Koji Harada

    IPC: G06K15/02 ,  G06K9/00

    CPC classification number: H04N1/32144 ,  G06T2201/0062 ,  H04N1/32352

    Abstract: Line spacing values in a document image are extracted and a variance is calculated for fluctuations in the line spacing values. When the calculated variance is higher than a preset threshold value, the document image is determined as having watermark information embedded therein. Such use of the variance in the line spacing values enables high-speed determination of the presence or absence of line-spacing watermark information. At this time, it is possible to speed up the determination by using only some line spacing values in the document, instead of using all line spacing values.

    Abstract translation: 提取文档图像中的行间距值，并计算行间距值中的波动的方差。 当计算出的方差高于预设的阈值时，文档图像被确定为具有嵌入其中的水印信息。 这种使用行间距值中的方差使得能够高速确定线间水印信息的存在或不存在。 此时，可以通过仅使用文档中的一些行间距值来加速确定，而不是使用所有行间距值。

    Reversible watermarking using expansion, rate control and iterative embedding
    88.
    发明授权
    Reversible watermarking using expansion, rate control and iterative embedding 有权
    可逆水印使用扩展，速率控制和迭代嵌入

    公开(公告)号：US07599518B2

    公开(公告)日：2009-10-06

    申请号：US11365976

    申请日：2006-02-28

    Applicant: Adnan M. Alattar ,  John Stach ,  Jun Tian

    Inventor： Adnan M. Alattar ,  John Stach ,  Jun Tian

    IPC: G06K9/00

    CPC classification number: G06T1/0028 ,  G06T2201/0051 ,  G06T2201/0083 ,  G06T2201/0202 ,  G06T2201/0203 ,  G10L19/018 ,  H04N1/32149 ,  H04N1/32187 ,  H04N1/32229 ,  H04N1/32283 ,  H04N1/32347 ,  H04N1/32352 ,  H04N2201/3233 ,  H04N2201/327

    Abstract: Reversible watermarking methods enable auxiliary data to be embedded in data sets, such as images, audio, video and software. The reversible nature of the method enables the original data set to be perfectly restored. Control systems with feedback loops are used to optimize embedding based on distortion or auxiliary data capacity constraints. The watermarking may be applied recursively to embed several layers, where subsequent layers are embedded into a previously watermarked data set. To recover the original data, each layer is extracted and the data restored in reverse order of the embedding. Sets of elements that are expanded to carry auxiliary data in each layer overlap or are interleaved to maximize embedding capacity or quality of the host data.

    Abstract translation: 可逆水印方法使辅助数据可以嵌入数据集，如图像，音频，视频和软件。 该方法的可逆性使得能够完美地恢复原始数据集。 具有反馈回路的控制系统用于基于失真或辅助数据容量约束优化嵌入。 可以递归地应用水印以嵌入几个层，其中后续层被嵌入到先前加水印的数据集中。 为了恢复原始数据，提取每一层，并以与嵌入相反的顺序恢复数据。 扩展为在每个层中传送辅助数据的元素的集合重叠或交织以最大化嵌入容量或主机数据的质量。

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