发明名称 |
Method and Apparatus for Hybrid Watermarking |
摘要 |
A hybrid watermark insertion method includes the steps of dividing the digital image into a low frequency region and a high frequency region using an edge map of the digital image; inserting a watermark into the low frequency region of the image by employing a watermarking method using a human visual system (HVS); and inserting the watermark into the high frequency region of the image by employing a quantization index modulation (QIM) method. A hybrid watermark extraction method includes the steps of estimating a reference value used when inserting a watermark, and searching a maximum value of correlation coefficients in an image of the watermark image while changing the estimated reference value within a designated range, to thereby find out the watermark insertion method. Accordingly, the watermark insertion method can be easily identified, thereby enabling the watermark extraction in a more readily manner.
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申请公布号 |
US2009172404(A1) |
申请公布日期 |
2009.07.02 |
申请号 |
US20060226915 |
申请日期 |
2006.08.11 |
申请人 |
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE |
发明人 |
KIM WON GYUM;SEO YONG-SEOK;LEE SEON HWA;YOO WONYOUNG;LEE SANG KWANG;LEE SUNG HWAN;LEE SEUNGJAE;JUNG HYE WON;YOON YOUNG-SUK;SEO JIN SOO;SUH YOUNG HO;OH WEON GEUN |
分类号 |
H04L9/00;G06K9/36;G06K9/40;G06K9/46 |
主分类号 |
H04L9/00 |
代理机构 |
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地址 |
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