Digital Image Watermarking Based on Discrete Wavelet Transform

A novel watermark casting scheme for digital images based on embedded wavelet coding is proposed. The watermark is embedded into the corresponding different resolution areas and different bit planes of the wavelet analysis images. The embedded capacity factor is determined by the area and bit plane where the selected wavelet coefficient is The detecting of watermarks is also hierarchical. Some experimental results demonstrate the better robustness and invisibility of watermarks embedded by our approach. At the same time, it is easier to combine the algorithm with embedded wavelet coding algorithm so as to implement the embedment. of the watermark in the process of image coding.