基于无损恢复的光学图像可见水印

Optical Image Watermarking Based on Lossless Recovery

为了有效保持光学图像安全,防止图像内容被篡改,提出一种无损恢复的光学图像可见水印方法。首先在光学图像中选择一个与待嵌入的水印图像相同尺寸区域,然后采用两个水印嵌入强度α_1、α_2和秘钥序列生成随机序列k_1、k_2,如果k1=0,则选择水印嵌入强度α1进行水印信息的嵌入,不然选择α_2进行水印信息的嵌入,实现自适应的水印信息嵌入,最后将恢复数据包与k_2进行异或操作,将结果隐藏于光学图像水印区域及其周围,并进行光学图像水印嵌入和恢复测试实验。结果表明,本文方法可以实现水印信息的有效嵌入,能够抵抗各种攻击的鲁棒性,具有较高的实际应用价值。

In order to keep the optical image safe and prevent the image from being tampered,we propose a new method of optical image visible watermarking.Firstly,the same size area of embedded watermark images are selected in optical image,and then the two watermark embedding strength of alpha 1,alpha 2 and secret key sequences to generate random sequences K_1,K_2,if k_1= 0,then choose the watermark embedding strength alpha 1 to embed watermark information,or select alpha 2 to achieve adaptive embedding the watermarking information,finally,the recovery data packets and the K_2 XOR operation,results can be hidden in the optical image visible watermark region and its surrounding,and optical image watermark embedding and recovery test. The results show that this technique can be used to embed the watermark image and resist all kinds of attacks,so has higher practical application value.