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    Method For Inserting and Extracting Multi-Bit Fingerprint Based on Wavelet
    2.
    发明申请
    Method For Inserting and Extracting Multi-Bit Fingerprint Based on Wavelet 审中-公开
    基于小波插入和提取多位指纹的方法

    公开(公告)号：US20080226124A1

    公开(公告)日：2008-09-18

    申请号：US12066421

    申请日：2005-12-14

    申请人： Yong Seok Seo ,  Hye Won Jung ,  Won Gyum Kim ,  Seon Hwa Lee

    发明人： Yong Seok Seo ,  Hye Won Jung ,  Won Gyum Kim ,  Seon Hwa Lee

    IPC分类号： G06K9/00

    CPC分类号： H04N19/467 ,  H04N1/3217 ,  H04N1/32187 ,  H04N1/32192 ,  H04N19/63 ,  H04N2201/3233 ,  H04N2201/327

    摘要： A method for inserting and extracting a fingerprint based on a wavelet is disclosed. The method includes: a) decomposing an original image into a first sub-band image having low frequency band columns and rows, a second sub-band image having high frequency band columns and low frequency band rows, a third sub-band image having low frequency band columns and high frequency band rows and a fourth sub-band image having high frequency band columns and rows by performing an n-level discrete wavelet transformation on an original image; b) obtaining a human visual system model from the first sub-band image; c) generating an N×N fingerprint basic block by performing a message modulation on a multi-bit fingerprint signal with a security key and adding a synch pattern to the modulated signal; d) repeatedly inserting the fingerprint basic block in to the second, the third and the fourth sub-band images with reference to the human visual system model; and e) generating a fingerprint inserted image by performing an inverse discrete wavelet transformation on the first sub-band image and the fingerprint basic block inserted second, third and fourth sub-band images.

    摘要翻译： 公开了一种基于小波插入和提取指纹的方法。 该方法包括：a）将原始图像分解为具有低频带列和行的第一子带图像，具有高频带列和低频带行的第二子带图像，具有低频带列的第三子带图像 频带列和高频带行以及具有高频带列和行的第四子带图像，通过对原始图像执行n级离散小波变换; b）从第一子带图像获得人类视觉系统模型; c）通过利用安全密钥对多比特指纹信号执行消息调制并将同步模式添加到调制信号来产生N×N指纹基本块; d）参照人类视觉系统模型，将指纹基本块重复插入第二，第三和第四子带图像; 以及e）通过对第一子带图像和插入的第二，第三和第四子带图像的指纹基本块执行逆离散小波变换来生成指纹插入图像。

    Method and Apparatus for Hybrid Watermarking
    4.
    发明申请
    Method and Apparatus for Hybrid Watermarking 审中-公开
    混合水印方法与装置

    公开(公告)号：US20090172404A1

    公开(公告)日：2009-07-02

    申请号：US12226915

    申请日：2006-08-11

    申请人： Won Gyum Kim ,  Yong-Seok Seo ,  Seon Hwa Lee ,  Wonyoung Yoo ,  Sang Kwang Lee ,  Sung Hwan Lee ,  Seungjae Lee ,  Hye Won Jung ,  Young-Suk Yoon ,  Jin Soo Seo ,  Young Ho Suh ,  Weon Geun Oh

    发明人： Won Gyum Kim ,  Yong-Seok Seo ,  Seon Hwa Lee ,  Wonyoung Yoo ,  Sang Kwang Lee ,  Sung Hwan Lee ,  Seungjae Lee ,  Hye Won Jung ,  Young-Suk Yoon ,  Jin Soo Seo ,  Young Ho Suh ,  Weon Geun Oh

    IPC分类号： H04L9/00 ,  G06K9/36 ,  G06K9/46 ,  G06K9/40

    CPC分类号： G06T1/0071 ,  G06T2201/0052

    摘要： A hybrid watermark insertion method includes the steps of dividing the digital image into a low frequency region and a high frequency region using an edge map of the digital image; inserting a watermark into the low frequency region of the image by employing a watermarking method using a human visual system (HVS); and inserting the watermark into the high frequency region of the image by employing a quantization index modulation (QIM) method. A hybrid watermark extraction method includes the steps of estimating a reference value used when inserting a watermark, and searching a maximum value of correlation coefficients in an image of the watermark image while changing the estimated reference value within a designated range, to thereby find out the watermark insertion method. Accordingly, the watermark insertion method can be easily identified, thereby enabling the watermark extraction in a more readily manner.

    摘要翻译： 混合水印插入方法包括以下步骤：使用数字图像的边缘图将数字图像分割成低频区域和高频区域; 通过使用人类视觉系统（HVS）的水印方法将水印插入图像的低频区域; 并通过采用量化索引调制（QIM）方法将水印插入图像的高频区域。 混合水印提取方法包括以下步骤：估计在插入水印时使用的参考值，并且在指定范围内改变估计的参考值的同时，在水印图像的图像中搜索相关系数的最大值，从而找出 水印插入法。 因此，可以容易地识别水印插入方法，从而能够更容易地进行水印提取。