发明名称 |
Method for image encoding |
摘要 |
Plural-bit data is encoded in an image without leaving apparent evidence of image alteration. The image is represented by data elements (e.g., pixels) whose values are changed to effect the encoding. The changes are desirably effected in groups, e.g., pixel groupings 5-10 pixels in height and width, and in a manner calculated to keep the changes relatively inconspicuous.
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申请公布号 |
US6072888(A) |
申请公布日期 |
2000.06.06 |
申请号 |
US19990317784 |
申请日期 |
1999.05.24 |
申请人 |
DIGIMARC CORPORATION |
发明人 |
POWELL, ROBERT D.;NITZBERG, MARK J. |
分类号 |
G06T1/00;G06T7/00;G06T9/00;G07D7/00;G07D7/12;G07D7/20;G07F7/12;G09C5/00;H04N1/32;H04N1/387;H04N1/40;H04N7/08;H04N7/081;H04N7/26;(IPC1-7):G06K9/00 |
主分类号 |
G06T1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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