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    • 1. 发明申请
    • EMBEDDING AND DETECTION OF WATERMARK IN A MOTION IMAGE SIGNAL
    • 水印在运动图像信号中的嵌入和检测
    • US20110280436A1
    • 2011-11-17
    • US13188813
    • 2011-07-22
    • Antonius Adrianus Cornelis Maria KALKERJaap Andre HAITSMA
    • Antonius Adrianus Cornelis Maria KALKERJaap Andre HAITSMA
    • G06K9/00
    • G06T1/0085G06T1/0064G06T2201/0051H04N19/467
    • A video watermarking scheme is disclosed, which is designed for the digital cinema format, as it will be used on large projector screens in theaters. The watermark is designed in such a way that it has minimal impact on the video quality, but is still detectable after capture with a handheld camera and conversion to, for instance, VHS, CD-Video or DVD format. The proposed watermarking system only exploits the temporal axis. This makes it invulnerable to geometrical distortions generally caused by such a way of capturing. The watermark is embedded by modulating a global property of the frames (e.g. the mean luminance) in accordance with the samples of the watermark. The embedding depth is preferably locally adapted within each frame to local statistics of the respective image. Watermark detection is performed by correlating the watermark sequence with extracted mean luminance values of a sequence of frames.
    • 公开了一种视频水印方案,其被设计用于数字电影格式,因为它将被用于剧院的大型投影仪屏幕上。 水印的设计方式使其对视频质量的影响最小,但在使用手持相机拍摄并转换为例如VHS,CD-Video或DVD格式后,仍然可以检测到水印。 所提出的水印系统仅利用时间轴。 这使得它几何失真通常是由这种捕获方式造成的。 通过根据水印的样本调制帧的全局属性(例如平均亮度)来嵌入水印。 嵌入深度优选地在每个帧内局部地适应于相应图像的局部统计。 通过将水印序列与帧序列的提取的平均亮度值相关联来执行水印检测。
    • 2. 发明授权
    • Fingerprint database updating method, client and server
    • 指纹数据库更新方法,客户端和服务器
    • US07523312B2
    • 2009-04-21
    • US10495283
    • 2002-10-24
    • Antonius Adrianus Cornelis Maria KalkerJaap Andre Haitsma
    • Antonius Adrianus Cornelis Maria KalkerJaap Andre Haitsma
    • G06F7/00
    • G06F17/30017Y10S707/99932Y10S707/99933Y10S707/99942
    • A method of updating a database (211) comprising a fingerprint of and an associated set of metadata for each of a number of multimedia objects, A multimedia object and a set of metadata for the multimedia object is downloaded from a file sharing client (101-105). A fingerprint is computed from the multimedia object, and the computed fingerprint and the obtained set of metadata are included in the database (211). The database (211) can be maintained by a central server (210), or be maintained in a distributed fashion by servers (404) running on the file sharing clients (101-105). The database (211) in this way accumulates plural sets of metadata associated with one particular fingerprint. When a sufficient number of sets has been collected, a definite set can be determined using filtering techniques.
    • 一种更新数据库(211)的方法,其包括多个多媒体对象中的每一个的指纹和相关的一组元数据,多媒体对象和多媒体对象的一组元数据从文件共享客户机(101- 105)。 从多媒体对象计算指纹,计算出的指纹和获得的元数据集合包括在数据库(211)中。 可以由中央服务器(210)维护数据库(211),或者通过在文件共享客户端(101-105)上运行的服务器(404)以分布式方式维护数据库。 数据库(211)以这种方式累积与一个特定指纹相关联的多组元数据。 当已经收集了足够数量的集合时,可以使用过滤技术来确定确定集合。
    • 4. 发明授权
    • Method and arrangement for embedding a watermark in an information signal
    • 在信息信号中嵌入水印的方法和装置
    • US06707930B2
    • 2004-03-16
    • US10003064
    • 2001-11-02
    • Antonius Adrianus Cornelis Maria KalkerJaap Andre Haitsma
    • Antonius Adrianus Cornelis Maria KalkerJaap Andre Haitsma
    • H04K100
    • G06T1/0028G06T2201/0081G06T2201/0202
    • The invention relates to a method of embedding a watermark W in an information signal P, to a corresponding arrangement for embedding a watermark W in an information signal P, to an information signal with an embedded watermark, and to a storage medium 50 having stored thereon an information signal P with an embedded watermark W. The watermark is embedded in the information signal by deriving sub-patterns Wi from said watermark pattern W, wherein the energy spectrum concentration of each sub-pattern Wi has a dominent orientation. The local weight factors &lgr;(P) for said watermark sub-patterns Wi are determined based on the local energy spectrum of the information signal P in said dominent orientation. Said watermark sub-patterns Wi are locally weighted using said determined local weight factors &lgr;(P). Finally, the locally weighted watermark sub-patterns (Wi) are added to the information signal P.
    • 本发明涉及将信息信号P中的水印W嵌入信息信号P中嵌入水印W的对应装置的方法,以及存储在其上的存储介质50 具有嵌入水印W的信息信号P.通过从所述水印图案W导出子图案Wi,将水印嵌入在信息信号中,其中每个子图案Wi的能谱浓度具有主导取向。 基于所述主导方向上的信息信号P的局部能量谱,确定所述水印子模式Wi的局部加权因子λ(P)。 使用所述确定的局部加权因子λ(P)对所述水印子模式Wi进行局部加权。 最后,将局部加权水印子模式(Wi)加到信息信号P。
    • 7. 发明授权
    • Embedding and detection of watermark in a motion image signal
    • 在运动图像信号中嵌入和检测水印
    • US07996678B2
    • 2011-08-09
    • US10480339
    • 2002-06-18
    • Antonius Adrianus Cornelis Maria KalkerJaap Andre Haitsma
    • Antonius Adrianus Cornelis Maria KalkerJaap Andre Haitsma
    • H04L9/00
    • G06T1/0085G06T1/0064G06T2201/0051H04N19/467
    • A video watermarking scheme is disclosed, which is designed for the digital cinema format, as it will be used on large projector screens in theaters. The watermark is designed in such a way that it has minimal impact on the video quality, but is still detectable after capture with a handheld camera and conversion to, for instance, VHS, CD-Video or DVD format. The proposed watermarking system only exploits the temporal axis. This makes it invulnerable to geometrical distortions generally caused by such a way of capturing. The watermark is embedded by modulating a global property of the frames (e.g. the mean luminance) in accordance with the samples of the watermark. The embedding depth is preferably locally adapted within each frame to local statistics of the respective image. Watermark detection is performed by correlating the watermark sequence with extracted mean luminance values of a sequence of frames.
    • 公开了一种视频水印方案,其被设计用于数字电影格式,因为它将被用于剧院的大型投影仪屏幕上。 水印的设计方式使其对视频质量的影响最小,但在使用手持相机拍摄并转换为例如VHS,CD-Video或DVD格式后,仍然可以检测到水印。 所提出的水印系统仅利用时间轴。 这使得它几何失真通常是由这种捕获方式造成的。 通过根据水印的样本调制帧的全局属性(例如平均亮度)来嵌入水印。 嵌入深度优选地在每个帧内局部地适应于相应图像的局部统计。 通过将水印序列与帧序列的提取的平均亮度值相关联来执行水印检测。