发明名称 |
System and method for data hiding in compressed fingerprint images |
摘要 |
A method to hide small messages in a wavelet compressed fingerprint image is presented. The method is characterized by random placement of the message bits in the compressed and quantized indices. The compressed image can be decompressed by any certified decompressor without any visible difference. However, the decoder aware of the decompression can only retrieve the hidden message in the image and additionally decompress the image without any error in pixel values.
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申请公布号 |
US6301368(B1) |
申请公布日期 |
2001.10.09 |
申请号 |
US19990240446 |
申请日期 |
1999.01.29 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
BOLLE RUDOLF MAARTEN;CONNELL JONATHAN HUDSON;RATHA NALINI KANTA |
分类号 |
G06T1/00;H04N1/32;(IPC1-7):G06K9/00 |
主分类号 |
G06T1/00 |
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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