[1]王树梅,张文斌. 一种基于伪随机的支持大尺寸图像水印算法[J].计算机技术与发展,2017,27(08):121-124.
　WANG Shu-mei,ZHANG Wen-bin. A Large-size Image Watermarking Algorithm with Pseudo-random[J].,2017,27(08):121-124.
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 一种基于伪随机的支持大尺寸图像水印算法()
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《计算机技术与发展》[ISSN:1006-6977/CN:61-1281/TN]

卷:
27
期数:
2017年08期
页码:
121-124
栏目:
安全与防范
出版日期:
2017-08-10

文章信息/Info

Title:
 A Large-size Image Watermarking Algorithm with Pseudo-random
文章编号:
1673-629X（2017)08-0121-04
作者:
 王树梅; 张文斌
 江苏师范大学 计算机学院
Author(s):
 WANG Shu-mei; ZHANG Wen-bin
关键词:
 ; 数字水印; 数字图像; 伪随机; 离散余弦变换
Keywords:
 ; digital watermarking; digital image; pseudo-random; discrete cosine transform
分类号:
TP391
文献标志码:
A
摘要:
 数字水印技术是信息隐藏的一种重要技术,在保护数字图像版权方面发挥着重要作用.提出了一种支持大尺寸的数字图像水印算法.该算法将大尺寸的图像作为水印信息嵌入到被保护的对象里,亦即将大尺寸的水印图像信息依据载体图像的特征大小获取水印信息量,并基于伪随机编码器确定水印信息的采样和嵌入位置,在对嵌入信息置乱的基础上对载体信息进行离散余弦变换,应用自适应方式将置乱后的水印信息嵌入到变换域的低频位置.自适应嵌入方式中的嵌入因子由嵌入位置的水印信息大小和载体像素值大小确定,需要对原始图像和含水印图像进行处理,在确定水印所在位置后,利用嵌入的逆运算提取出水印信息,利用逆置乱算法还原水印信息到原始水印图像.验证实验结果表明,所提出的算法具备较强的实用性和安全性.
Abstract:
 Digital watermarking is an important technology of information hiding and plays an important role in protection of copyright of digital images.A digital watermarking algorithm with support of large size is proposed,which embeds images of large size as watermark information in the protected object.That means the watermark information amount is acquired by watermark image information with large size according to the feature of the carrier image,and the sampling and embedded location of watermark information is determined based on the pseudo-random encoder.Then the carrier information is carried on the discrete cosine transform on the basis of embedded information scrambled,using the adaptive way to embed the scrambled watermark information into low-frequency location of the transformed domain.The embedding factor in the adaptive embedding method is determined by the watermark information size and the vector pixel value of the embedding position.The original image and the watermarked image need to be processed.After positioning the watermark,the embedded inversion is used to extract the watermark information and the watermark information is restored to the original watermarked image by the inverse scrambling algorithm.The experimental results show that it has strong practicability and security.

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更新日期/Last Update: 2017-09-21