View article

In this paper, a wavelet domain robust watermarking technique for still images is presented. The proposed watermarking algorithm is based on 3 key aspects. First, message encoding is accomplished based on iterative error correction codes to reach channel capacity with reasonable decoder complexity. Secondly, watermark embedding is performed in the wavelet domain using a stochastically driven perceptual criterion to provide watermark invisibility. Thirdly, a new principle of watermark spatial allocation, based on the watermark magnitude spectrum, is proposed to recover from general affine geometrical distortions.