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    Method for blindly embedding and extracting a watermark by using wavelet transform and an HVS model
    1.
    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。

    Method for embedding and extracting digital watermark on lowest wavelet subband
    2.
    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。

    Robust blind watermarking method in wavelet DC components
    3.
    发明授权
    Robust blind watermarking method in wavelet DC components 有权
    小波直流分量中的鲁棒盲水印方法

    公开(公告)号：US06934403B2

    公开(公告)日：2005-08-23

    申请号：US10029835

    申请日：2001-12-31

    申请人： Sanghyun Joo ,  Yong-Seok Seo ,  Young Ho Suh ,  Weon Geun Oh

    发明人： Sanghyun Joo ,  Yong-Seok Seo ,  Young Ho Suh ,  Weon Geun Oh

    IPC分类号： H04N5/913 ,  G06T1/00 ,  G06K9/00

    CPC分类号： G06T1/0057 ,  G06T2201/0052 ,  G06T2201/0083

    摘要： An apparatus and method for embedding and extracting digital watermarks using a blind mode based on wavelet transform which is robust to external attacks while being capable of minimizing a degradation in picture quality caused by embedding of the watermarks. In accordance with the invention, watermarks protection of the copyright for desired data are embedded in DC component domains of wavelet-transformed domains. In accordance with the invention, embedding of watermarks in a target image corresponding to a target domain in which the watermarks are to be embedded, is achieved by generating a data stream of the watermarks in accordance with a key value selected by the user, generating index information representing positions where the watermarks are to be embedded, in accordance with a key value selected by the ser, and reflecting the watermark data stream on data values of pixels in the target image at the positions based on the index information.

    摘要翻译： 一种使用基于小波变换的盲模式嵌入和提取数字水印的装置和方法，该小波变换对于外部攻击是鲁棒的，同时能够最小化由嵌入水印引起的图像质量的劣化。 根据本发明，水印保护期望数据的版权被嵌入到小波变换域的DC分量域中。 根据本发明，通过根据用户选择的键值产生水印的数据流，将水印嵌入在与要嵌入水印的目标域相对应的目标图像中，产生索引 根据由该服务器选择的键值来表示要嵌入水印的位置的信息，并且基于该索引信息，将该水印数据流反映在该目标图像中的像素的数据值上。

    Apparatus and method for tutoring in convergence space of real and virtual environment
    8.
    发明授权
    Apparatus and method for tutoring in convergence space of real and virtual environment 有权
    用于在实际和虚拟环境的融合空间中进行辅导的装置和方法

    公开(公告)号：US09076345B2

    公开(公告)日：2015-07-07

    申请号：US13439809

    申请日：2012-04-04

    申请人： Sang Won Ghyme ,  Sanghyun Joo ,  Jaehwan Kim ,  Hyo Taeg Jung ,  Il Kwon Jeong

    发明人： Sang Won Ghyme ,  Sanghyun Joo ,  Jaehwan Kim ,  Hyo Taeg Jung ,  Il Kwon Jeong

    IPC分类号： G09B5/06 ,  G06T13/40

    CPC分类号： G09B5/06

    摘要： An apparatus for tutoring in a convergence space of real and virtual environment, includes a character data processing unit for generating character shape and operation data of a participant or performing rendering on the character shape and operation data; a desk data processing unit for generating desk shape data or perform the rendering on the desk shape data; a voice and sound data processing unit for generating voice or sound data or outputs the voice or sound data; and a virtual space processing unit for generating real space data and providing the generated data to another participant, generating the convergence space data, or generating the character shape data, the operation data, the desk shape data, and the voice or sound data, then providing the generated data to the character data processing unit, the desk data processing unit, and the voice and sound data processing unit.

    摘要翻译： 一种用于在真实和虚拟环境的融合空间中进行辅导的装置，包括用于产生参与者的角色形状和操作数据的字符数据处理单元，或者对字符形状和操作数据执行呈现; 桌面数据处理单元，用于产生桌面形状数据或对桌面形状数据执行呈现; 用于产生语音或声音数据或输出语音或声音数据的语音和声音数据处理单元; 以及虚拟空间处理单元，用于生成实际空间数据并将生成的数据提供给另一参与者，生成收敛空间数据或生成字符形状数据，操作数据，桌面形状数据和语音或声音数据，然后 将生成的数据提供给字符数据处理单元，桌面数据处理单元和语音和声音数据处理单元。

    METHOD AND APPARATUS FOR REPRESENTING SENSORY EFFECTS AND COMPUTER READABLE RECORDING MEDIUM STORING SENSORY DEVICE COMMAND METADATA
    9.
    发明申请
    METHOD AND APPARATUS FOR REPRESENTING SENSORY EFFECTS AND COMPUTER READABLE RECORDING MEDIUM STORING SENSORY DEVICE COMMAND METADATA 审中-公开
    用于表示感知效应的方法和装置和计算机可读记录媒体存储感知设备命令元数据

    公开(公告)号：US20110125789A1

    公开(公告)日：2011-05-26

    申请号：US13054679

    申请日：2009-07-16

    申请人： Sanghyun Joo ,  Bum-Suk Choi ,  Seungsoon Park ,  Hae-Ryong Lee ,  Kwang-Roh Park

    发明人： Sanghyun Joo ,  Bum-Suk Choi ,  Seungsoon Park ,  Hae-Ryong Lee ,  Kwang-Roh Park

    IPC分类号： G06F17/30

    CPC分类号： G06F3/011 ,  G11B27/034

    摘要： Provided are method and apparatus for representing sensory effects, and a computer readable recording medium storing sensory device command metadata. A method for representing sensory effects, includes: receiving sensory effect metadata including sensory effect information; obtaining the sensory effect information by analyzing the sensory effect metadata; and generating sensory device command metadata for controlling sensory devices corresponding to the sensory effect information, wherein the sensory device command metadata includes sensory device command description information for controlling the sensory devices.

    摘要翻译： 提供了用于表示感官效果的方法和装置，以及存储感觉装置命令元数据的计算机可读记录介质。 一种用于表示感官效果的方法，包括：接收感觉效果元数据，包括感觉效果信息; 通过分析感官效应元数据获得感官效果信息; 以及生成用于控制对应于感觉效果信息的感觉装置的感觉装置命令元数据，其中感觉装置命令元数据包括用于控制感觉装置的感觉装置命令描述信息。