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    Method and Apparatus for Hybrid Watermarking
    1.
    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。

    Method For Inserting and Extracting Multi-Bit Fingerprint Based on Wavelet
    4.
    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。

    System and Method For Tracing Illegally Copied Contents on the Basis of Fingerprint
    5.
    发明申请
    System and Method For Tracing Illegally Copied Contents on the Basis of Fingerprint 审中-公开
    基于指纹跟踪非法复制内容的系统和方法

    公开(公告)号：US20080256647A1

    公开(公告)日：2008-10-16

    申请号：US11575884

    申请日：2004-11-24

    申请人： Jin Ho Kim ,  Wonyoung Yoo ,  Yong Seok Seo ,  Seon Hwa Lee ,  Young Ho Suh

    发明人： Jin Ho Kim ,  Wonyoung Yoo ,  Yong Seok Seo ,  Seon Hwa Lee ,  Young Ho Suh

    IPC分类号： G06F21/00

    CPC分类号： G06F21/10 ,  G06F2221/0737

    摘要： Disclosed is a system and method for tracing illegally copied contents on the basis of fingerprint. Purchaser information is inserted into digital contents that include image, audio or video data using a fingerprinting system when the digital contents are sold in the distribution process of the digital contents. If the contents purchaser has illegally copied and distributed the contents through the Internet or a P2P (Peer to Peer) server that is a file sharing server, the corresponding contents are searched for using a searcher and the corresponding purchaser is traced on the basis of fingerprint information inserted into the contents.

    摘要翻译： 公开了一种基于指纹跟踪非法复制的内容的系统和方法。 当数字内容在数字内容的分发过程中销售时，采购者信息被插入到包括图像，音频或视频数据的数字内容中，使用指纹系统。 如果内容购买者通过互联网或作为文件共享服务器的P 2 P（对等）服务器非法复制和分发内容，则使用搜索者搜索相应的内容，并且基于相应的购买者 的指纹信息插入内容。

    Method for embedding and extracting digital watermark on lowest wavelet subband
    6.
    发明授权
    Method for embedding and extracting digital watermark on lowest wavelet subband 有权
    在最小小波子带上嵌入和提取数字水印的方法

    公开(公告)号：US07343025B2

    公开(公告)日：2008-03-11

    申请号：US10734142

    申请日：2003-12-15

    申请人： Yong Seok Seo ,  Sanghyun Joo ,  Seon Hwa Lee

    发明人： Yong Seok Seo ,  Sanghyun Joo ,  Seon Hwa Lee

    IPC分类号： G06K9/00 ,  G06K9/64

    CPC分类号： H04N1/32187 ,  G06T1/0057 ,  H04N1/3217

    摘要： A for embedding a digital watermark on a wavelet lowest subband includes: setting a DC component region of a multi-stage wavelet-transformed original copy image to a watermark embedment region, and high-frequency filtering an original picture LLn of the embedment region; generating index information for designating a pixel position, and a watermark sequence to be embedded; calculating an embedment strength λ for each position of the watermark embedment region; in case the watermark sequence is sequentially embedded on an embedded position designated by the index information, mutually comparing the original picture LLn coefficient value for each embedded position with a mirror picture LLn′ coefficient value, and then altering the original picture LLn coefficient value; and in case the original picture LLn coefficient value is differentiated above a predetermined value with reference to the coffesponding embedment strength λ, skipping the watermark embedment for the position.

    摘要翻译： A，用于在小波最小子带上嵌入数字水印包括：将多级小波变换的原始复制图像的DC分量区域设置到水印嵌入区域，并对原始图像LL N n进行高频滤波， SUB>的嵌入区域; 产生用于指定像素位置的索引信息和要嵌入的水印序列; 计算水印嵌入区域的每个位置的嵌入强度λ; 在水印序列被顺序地嵌入在由索引信息指定的嵌入位置上的情况下，将每个嵌入位置的原始图像LL N n系数值与镜像LL 系数值，然后改变原始图像LL 系数值; 并且在原始图像LL N n系数值相对于响应的嵌入强度λλ被区分到高于预定值的情况下，跳过该位置的水印嵌入。

    Method for blindly embedding and extracting a watermark by using wavelet transform and an HVS model
    7.
    发明授权
    Method for blindly embedding and extracting a watermark by using wavelet transform and an HVS model 有权
    通过使用小波变换和HVS模型盲嵌入和提取水印的方法

    公开(公告)号：US07292708B2

    公开(公告)日：2007-11-06

    申请号：US10778552

    申请日：2004-02-17

    申请人： Seon Hwa Lee ,  Sanghyun Joo ,  Young Ho Suh

    发明人： Seon Hwa Lee ,  Sanghyun Joo ,  Young Ho Suh

    IPC分类号： G06K9/00

    CPC分类号： G06T1/0028 ,  G06T2201/0052 ,  G06T2201/0083 ,  G06T2201/0202

    摘要： The present invention relates to a method for blindly embedding and extracting a watermark by using wavelet transform and a human visual system (HVS) model, which obtains both robustness and invisibility by applying the HVS model of NVF or JND imitating a human visual system to a middle frequency band for wavelet transformation and using a quantization step determined adaptively according to the importance of wavelet coefficient. A method according to the present invention includes the steps of: decomposing an original image by a wavelet and selecting a middle frequency band as a watermark embedment area; obtaining an HVS model having a human visual recognition information at each embedding position; determining the importance of the coefficient for each embedding position, and adaptively determining a quantization step for each embedment location by using the importance and the HVS model; quantizing each pair of embedment area by the quantization step and variably embedding a watermark sequence into a middle frequency band according to a value of the watermark; and performing inverse wavelet transform on an overall area into which the watermark sequence is embedded, and generating a watermarked image.

    摘要翻译： 本发明涉及通过使用小波变换和人类视觉系统（HVS）模型盲嵌入和提取水印的方法，其通过将模拟人类视觉系统的NVF或JND的HVS模型应用于 用于小波变换的中频带，并使用根据小波系数的重要性自适应确定的量化步长。 根据本发明的方法包括以下步骤：通过小波分解原始图像并选择中频带作为水印嵌入区; 获得在每个嵌入位置具有人类视觉识别信息的HVS模型; 确定每个嵌入位置的系数的重要性，并通过使用重要性和HVS模型自适应地确定每个嵌入位置的量化步长; 通过量化步长量化每对嵌入区域，并根据水印的值将水印序列可变地嵌入中频段; 并对嵌入水印序列的整个区域进行逆小波变换，并生成水印图像。