Digital watermark embedding device and method, and digital watermark detection device and method
    11.
    发明授权
    Digital watermark embedding device and method, and digital watermark detection device and method 失效
    数字水印嵌入装置及方法及数字水印检测装置及方法

    公开(公告)号:US08218812B2

    公开(公告)日:2012-07-10

    申请号:US12602140

    申请日:2007-05-28

    IPC分类号: G06K9/00

    摘要: A digital watermark embedding device according to the present invention includes: a watermark pattern generation part (4) which generates a watermark pattern varying in a time direction based on embedding information to be embedded in an input image to be processed; a synchronization pattern generation part (3) which outputs a fixed pattern for detecting synchronization as a watermark pattern; a pattern switching part (5) which selects between the watermark pattern output by the synchronization pattern generation part (3) and the watermark pattern output by the watermark pattern generation part (4) based on the input image (7a); and an embedding processing part (6) which adds the selected watermark pattern to each pixel value of the input image (7a) to generate an embedded image (7c) having a digital watermark embedded therein. Consequently, phase shifting may be detected based on the fixed pattern for detecting synchronization, there by being capable of precisely detecting the digital watermark out of a recaptured image as well.

    摘要翻译: 根据本发明的数字水印嵌入装置包括:水印图案生成部分(4),其基于要嵌入待处理的输入图像中的嵌入信息生成在时间方向上变化的水印图案; 输出用于检测同步的固定图案作为水印图案的同步图案生成部(3) 在由所述同步图案生成部(3)输出的水印图案和由所述输入图像(7a)输出的水印图案生成部(4)的水印图案之间进行选择的图案切换部(5)。 以及嵌入处理部分(6),其将所选择的水印图案添加到输入图像(7a)的每个像素值,以生成嵌入有数字水印的嵌入图像(7c)。 因此,可以基于用于检测同步的固定模式来检测相移,从而能够从重新捕获的图像中精确地检测数字水印。

    Electronic watermark embedding method, electronic watermark detecting method, electronic watermark detecting apparatus and program
    12.
    发明授权
    Electronic watermark embedding method, electronic watermark detecting method, electronic watermark detecting apparatus and program 有权
    电子水印嵌入法,电子水印检测法,电子水印检测装置及程序

    公开(公告)号:US07769197B2

    公开(公告)日:2010-08-03

    申请号:US10586997

    申请日:2005-02-14

    IPC分类号: G06K9/00

    摘要: An electronic image into which an electronic watermark is to be embedded is divided into a plurality of image regions spatially, and pixels each having a property of being difficult to visually recognize a variation in a pixel value are extracted as adaptive pixels from each of the plurality of image regions. A variation between the pixel values of the adaptive pixels in one of the plurality of image regions and those of the adaptive pixels in an adjacent one of the plurality of image regions is produced, and the pixel values of the adaptive pixels of the plurality of image regions are varied in a time direction according to the value of an embedded bit set of the electronic watermark. An electronic-watermark-embedded image is then generated by making the variation in the pixel values of the adaptive pixels vary step by step at a boundary between the two of the plurality of image regions and/or in the time direction so that the variation makes a slow transition.

    摘要翻译: 将要嵌入电子水印的电子图像在空间上划分为多个图像区域,并且提取具有难以视觉识别像素值变化的性质的像素作为多个图像中的每一个的自适应像素 的图像区域。 产生多个图像区域中的一个图像区域中的自适应像素的像素值与多个图像区域中的相邻图像区域中的自适应像素的像素值之间的变化,并且多个图像中的自适应像素的像素值 区域根据电子水印的嵌入位集合的值在时间方向上变化。 然后,通过使自适应像素的像素值的变化在多个图像区域中的两个之间和/或时间方向上的边界处逐步变化,从而生成电子水印嵌入图像,使得变化 一个缓慢的过渡。

    DIGITAL WATERMARK EMBEDDING DEVICE AND METHOD, AND DIGITAL WATERMARK DETECTION DEVICE AND METHOD
    13.
    发明申请
    DIGITAL WATERMARK EMBEDDING DEVICE AND METHOD, AND DIGITAL WATERMARK DETECTION DEVICE AND METHOD 失效
    数字水印嵌入装置及方法及数字水印检测装置及方法

    公开(公告)号:US20100172539A1

    公开(公告)日:2010-07-08

    申请号:US12602140

    申请日:2007-05-28

    IPC分类号: G06K9/00

    摘要: A digital watermark embedding device according to the present invention includes: a watermark pattern generation part (4) which generates a watermark pattern varying in a time direction based on embedding information to be embedded in an input image to be processed; a synchronization pattern generation part (3) which outputs a fixed pattern for detecting synchronization as a watermark pattern; a pattern switching part (5) which selects between the watermark pattern output by the synchronization pattern generation part (3) and the watermark pattern output by the watermark pattern generation part (4) based on the input image (7a); and an embedding processing part (6) which adds the selected watermark pattern to each pixel value of the input image (7a) to generate an embedded image (7c) having a digital watermark embedded therein. Consequently, phase shifting may be detected based on the fixed pattern for detecting synchronization, there by being capable of precisely detecting the digital watermark out of a recaptured image as well.

    摘要翻译: 根据本发明的数字水印嵌入装置包括:水印图案生成部分(4),其基于要嵌入待处理的输入图像中的嵌入信息生成在时间方向上变化的水印图案; 输出用于检测同步的固定图案作为水印图案的同步图案生成部(3) 在由所述同步图案生成部(3)输出的水印图案和由所述输入图像(7a)输出的水印图案生成部(4)的水印图案之间进行选择的图案切换部(5)。 以及嵌入处理部分(6),其将所选择的水印图案添加到输入图像(7a)的每个像素值,以生成嵌入有数字水印的嵌入图像(7c)。 因此,可以基于用于检测同步的固定模式来检测相移,从而能够从重新捕获的图像中精确地检测数字水印。

    Electronic Watermark Embedding Method, Electronic Watermark Detecting Method, Electronic Watermark Detecting Apparatus and Program
    14.
    发明申请
    Electronic Watermark Embedding Method, Electronic Watermark Detecting Method, Electronic Watermark Detecting Apparatus and Program 有权
    电子水印嵌入方法,电子水印检测方法,电子水印检测仪器及程序

    公开(公告)号:US20080273741A1

    公开(公告)日:2008-11-06

    申请号:US10586997

    申请日:2005-02-14

    IPC分类号: G06K9/00

    摘要: An electronic image into which an electronic watermark is to be embedded is divided into a plurality of image regions spatially, and pixels each having a property of being difficult to visually recognize a variation in a pixel value are extracted as adaptive pixels from each of the plurality of image regions. A variation between the pixel values of the adaptive pixels in one of the plurality of image regions and those of the adaptive pixels in an adjacent one of the plurality of image regions is produced, and the pixel values of the adaptive pixels of the plurality of image regions are varied in a time direction according to the value of an embedded bit set of the electronic watermark. An electronic-watermark-embedded image is then generated by making the variation in the pixel values of the adaptive pixels vary step by step at a boundary between the two of the plurality of image regions and/or in the time direction so that the variation makes a slow transition.

    摘要翻译: 将要嵌入电子水印的电子图像在空间上划分为多个图像区域,并且提取具有难以视觉识别像素值变化的性质的像素作为多个图像中的每一个的自适应像素 的图像区域。 产生多个图像区域中的一个图像区域中的自适应像素的像素值与多个图像区域中的相邻图像区域中的自适应像素的像素值之间的变化,并且多个图像中的自适应像素的像素值 区域根据电子水印的嵌入位集合的值在时间方向上变化。 然后,通过使自适应像素的像素值的变化在多个图像区域中的两个之间和/或时间方向上的边界处逐步变化,从而生成电子水印嵌入图像,使得变化 一个缓慢的过渡。