发明名称 |
Watermarking of digital image data |
摘要 |
Digital watermarks can serve to indicate copyright ownership of digitized video. When video images are transmitted as transformed by discrete cosine transformation (DCT) for compression, with or without motion compensation, it is advantageous to include a watermark after transformation. To this end, a DCT watermark is generated for optimal visibility based on the original image data, and the generated watermark is superposed on the transformed data.
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申请公布号 |
US7154560(B1) |
申请公布日期 |
2006.12.26 |
申请号 |
US20000530308 |
申请日期 |
2000.09.05 |
申请人 |
CHANG SHIH-FU;MENG JIANHAO |
发明人 |
CHANG SHIH-FU;MENG JIANHAO |
分类号 |
H04N9/76;G09C5/00;H04L9/00 |
主分类号 |
H04N9/76 |
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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