抄録
This paper describes a method of digitally watermarking image signals based on the wavelet transform. Information data can be embedded in the lowest frequency components of the image signals by using a controlled quantization process. The data are then extracted by using both the quantization stepsize and the mean amplitude of the lowest frequency components without having access to the original image. Numerical experiments show that this method provides a high-quality watermark that is robust against common signal processing.
