基于差错控制编码的数字水印

Digital Image Watermarking Algorithm Based on Error Correcting Coding

提出了一种基于差错控制编码与离散小波变换相结合的水印嵌入方法.对置乱并分块后的二进制水印图像数据进行BCH编码,把编码后的数据根据量化的方法嵌入到原始图像小波变换后的各子带中.实验表明,这种方法对几何攻击、加噪、JPEG压缩等均保持了良好的稳健性.

The current paper proposed a watermarking algorithm using error correcting coding （ECC） and discrete wavelet transform （DWT） of image. The original image is decomposed with DWT. The watermarking image is scrambled, and BCH coded, then the watermarking value is embedded into each subbands of decomposed original image by quantifying these coefficients. Experiment results confirmed that the proposed watermarking algorithm was robust to geometric attack and noise, JPEG compression etc.