Invention Application
WO0215586A9 METHOD AND SYSTEM OF WATERMARKING DIGITAL DATA USING SCALED BIN ENCODING AND MAXIMUM LIKELIHOOD DECODING
审中-公开
使用规模化编码和最大似然解码的水印数字数据的方法和系统
- Patent Title: METHOD AND SYSTEM OF WATERMARKING DIGITAL DATA USING SCALED BIN ENCODING AND MAXIMUM LIKELIHOOD DECODING
- Patent Title (中): 使用规模化编码和最大似然解码的水印数字数据的方法和系统
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Application No.: PCT/IB0101447Application Date: 2001-08-14
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Publication No.: WO0215586A9Publication Date: 2003-05-08
- Inventor: LEVY AVRAHAM , MERHAV NERI
- Applicant: HEWLETT PACKARD CO
- Assignee: HEWLETT PACKARD CO
- Current Assignee: HEWLETT PACKARD CO
- Priority: US64222300 2000-08-18
- Main IPC: G06T1/00
- IPC: G06T1/00 ; H04N1/387 ; H04N7/26
Abstract:
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.
Public/Granted literature
- WO0215586A2 METHOD AND SYSTEM OF WATERMARKING DIGITAL DATA USING SCALED BIN ENCODING AND MAXIMUM LIKELIHOOD DECODING Public/Granted day:2002-02-21
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