An improved semi-fragile watermark scheme

被引：0
|
作者：
Hang, TB [1 ]
Xiang, H [1 ]
Meng, XX [1 ]
机构：
[1] Shandong Univ, Sch Comp Sci, Jinan 250061, Peoples R China
来源：
CAD/ GRAPHICS TECHNOLOGY AND ITS APPLICATIONS, PROCEEDINGS | 2003年
关键词：
semi-fragile watermarks; content authentication; alteration detection; Hilbert Curve;
D O I：
暂无
中图分类号：
TP31 [计算机软件];
学科分类号：
081202 ; 0835 ;
摘要：
In this paper, we describe an improved semi-fragile watermark scheme, which use the density of edge points in each block of an image to determine the watermark strength in watermark embedding process, so it reduces the false positive and miss positive of original algorithm effectively. We use Hilbert scan curve to simplify the computations of correlation in watermark detection process. The tamper detector can identify the tampered region from the received watermarked image without original watermarked image, which can be used for the content authentication. Experimental results show that this scheme is robust to incidental manipulations for image, such as JPEG compression.
引用
收藏
页码：390 / 391
页数：2
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