发明名称 |
Image processing apparatus and image processing method |
摘要 |
An apparatus generates additional data used to check whether an encoded digital image is changed or not. The apparatus includes a calculation unit and a recording unit. The calculation unit (a) performs a predetermined calculation using the encoded digital image and confidential information and (b) generates the additional data by applying a one-way function to a result of the predetermined calculation. The recording unit records both the encoded digital image and the additional data on a recording medium. The confidential information includes (a) first information unique to the apparatus, and (b) second information unique to an external apparatus connected to the apparatus.
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申请公布号 |
US7296161(B1) |
申请公布日期 |
2007.11.13 |
申请号 |
US20000521424 |
申请日期 |
2000.03.08 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
WAKAO SATORU;IWAMURA KEIICHI |
分类号 |
G09C1/00;H04L9/00;G06T1/00;G09C5/00;H04L9/32;H04N1/387 |
主分类号 |
G09C1/00 |
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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