基于小波变换和相对量化的图像数字水印算法

提出了一种基于分块小波变换和相对量化的图像数字水印算法。由于在算法中采用了量化嵌入策略,从而在提取水印时无需原始图像和原始水印。实验结果表明,该算法对嵌入的水印具有很好的透明性,对亮度和对比度调整攻击具有非常强的稳健性,对JPEG压缩、重采样、颜色抖动、平滑和加噪声等常见的图像处理攻击具有很强的稳健性,并且算法思想简单、步骤简便和容易实现。

Image digital watermarking algorithm based on wavelet transform and relative quantization

An image digital watermarking algorithm is proposed,based on blocked wavelet transform and relative quantization which is simple,handy and easy to implement.For the using of quantization scheme,the algorithm can extract watermark without original image and original watermark.Experimental results show that the algorithm has a fine transparency of the embedded watermark image,and the algorithm is very robust against brightness and contrast attacks and is robust against attacks such as JPEGcompression,re-sampl...