公开(公告)号：US20050025335A1

公开(公告)日：2005-02-03

申请号：US10872921

申请日：2004-06-21

申请人： Jeffrey Bloom ,  John Nafziger

发明人： Jeffrey Bloom ,  John Nafziger

IPC分类号： G06K9/00

CPC分类号： G06T1/0028 ,  G06T1/0085 ,  G06T2201/0051 ,  G06T2201/0081

摘要： A low-frequency, temporally asymmetric watermark carrier decreases in luminance in a substantially monotonic manner more slowly than it increases in luminance in a substantially monotonic manner. This allows the carrier to be embedded, e.g., in a video work, in a manner that renders the resultant watermark virtually invisible to the human eye. Moreover, the resultant watermark is substantially resistant to common pirating techniques in which high-frequency visual content (e.g., including watermark data) tends to be filtered out by piracy processing.

公开(公告)号：US20050175216A1

公开(公告)日：2005-08-11

申请号：US11098954

申请日：2005-04-05

申请人： Jeffrey Bloom ,  John Nafziger

发明人： Jeffrey Bloom ,  John Nafziger

IPC分类号： G06K9/00

CPC分类号： G06T1/0028 ,  G06T1/0085 ,  G06T2201/0051 ,  G06T2201/0081

摘要： A low-frequency, temporally asymmetric watermark carrier decreases in luminance in a substantially monotonic manner at a different rate than it increases in luminance in a substantially monotonic manner. This allows the carrier to be embedded, e.g., in a video work, in a manner that renders the resultant watermark virtually invisible to the human eye. Moreover, the resultant watermark is substantially resistant to common pirating techniques in which high-frequency visual content (e.g., including watermark data) tends to be filtered out by piracy processing.

摘要翻译： 低频，时间不对称的水印载体以基本单调的方式以与基本单调的亮度增加的速率不同的速率降低亮度。 这允许载体例如以视频工作的方式被嵌入，使得所得到的水印几乎对人眼不可见。 此外，所得到的水印基本上抵抗常见的盗版技术，其中高频可视内容（例如，包括水印数据）倾向于通过盗版处理过滤掉。