| 发明名称 |
Method of detecting image compression |
| 摘要 |
<p>A method detects if an image is compressed. The method determines a block grid within the image and establishes blocks from the determined grid. The method then computes differences between samples inside the established blocks and differences between samples across the established blocks. The method determines that the image is compressed based on characteristics derived from statistics of the computed differences. <IMAGE></p> |
| 申请公布号 |
EP1001608(A2) |
申请公布日期 |
2000.05.17 |
| 申请号 |
EP19990308884 |
申请日期 |
1999.11.08 |
| 申请人 |
XEROX CORPORATION |
发明人 |
DE QUEIROZ, RICHARD L. |
| 分类号 |
G06T9/00;H03M7/30;H04N1/00;H04N1/41;H04N7/26;H04N7/30;(IPC1-7):H04N1/40;H04N1/333 |
主分类号 |
G06T9/00 |
| 代理机构 |
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代理人 |
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| 主权项 |
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