抄録
In this report, one of watermarking methods by using spread spectrum and wavelet is proposed. The original image is spread its frequency domain at first. The energy of high friqency domain is calculated by decomposing the spread image with wavelet. Watermark is embedded into the subband region of multi-resolution analysis with using the energy of multi-resolution representation. The watermark is spread and become low power and wide band signal. In result, invisible watermark can be made. Our proposal scheme provides a good tool as one of copyright protection techniques for multimedia network.
