发明名称 |
Method and system of watermarking digital data using scaled bin encoding and maximum likelihood decoding |
摘要 |
A transform domain watermarking technique which is based on a new encoding scheme referred to as scaled bin encoding which encodes a message in a set of transform coefficients by modifying their values in a way that preserves high image quality (i.e., low distortion levels) and adapts to expected noise level. Recapturing of the watermark image is performed via a decoding method using a maximum likelihood procedure (i.e., maximum likelihood decoding), based on the statistics of the transform coefficients and a worst case statistical model of the noise introduced to these coefficients by image processing operations or attack noise.
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申请公布号 |
US6721439(B1) |
申请公布日期 |
2004.04.13 |
申请号 |
US20000642223 |
申请日期 |
2000.08.18 |
申请人 |
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. |
发明人 |
LEVY AVRAHAM;MERHAV NERI |
分类号 |
G06T1/00;H04N1/387;H04N7/26;(IPC1-7):G06K9/00 |
主分类号 |
G06T1/00 |
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