摘要
为了更好地解决数字图像产品的版权保护问题,需要进行数字图像内容保护下双重隐形数字水印方法的研究。但是采用当前方法对图像进行水印嵌入时,无法将水印隐藏到图像颜色分量的低频系数中,存在图像水印嵌入效果差的问题。为此提出一种基于小波变换的数字图像内容保护下双重隐形数字水印方法。上述方法在数字图像内容保护下,先基于小波分析理论对载体图像进行整数提升和分解,对低频系数自适应量化取整,对每个整数的某个有效位进行异或,利用RGB颜色空间转换方法提取原始数字图像的RGB三个彩色分量,将版权水印隐藏在蓝色分量的低频系数中,将认证水印隐藏在绿色分量的中频系数中,有效地完成了数字图像内容保护下双重隐形数字水印的嵌入。仿真证明,所提方法水印嵌入具有较好的鲁棒性和不可见性,为实现图像产品的版权保护提供了科学的依据。
This paper puts forward a protection method of double invisible digital watermarking under digital im- age content protection based on wavelet transform. Under the protection of digital image content, firstly, the integer promotion and integer factorization for carrier image are carried out based on theory of wavelet analysis, the self - a- daptive quantization of low frequency coefficients is rounded, and XOR operation for a significant bit of every integer is performed, Then, RGB color space transformation method is used to extract three color components RGB of original digital image, so as to hide copyright watermark in low frequency coefficient of blue component and hide the authenti- cation watermarking in the intermediate frequency coefficient of green component, which effectively complete the em- bedding of double invisible digital watermarking under digital image content protection. Simulation results show that the watermark embedding of proposed method has good robustness and invisibility, which provides a scientific basis for copyright protection of image products.
出处
《计算机仿真》
北大核心
2018年第2期388-391,共4页
Computer Simulation
关键词
数字图像
内容保护
隐形数字水印
Digital image
Content protection
Invisible digital watermarking
