A novel robust watermarking scheme is proposed

in which a permuted watermark is embedded into a permuted image.We use a chaotic map to permute the image and the watermark data.and embed the watermark by resetting the relationship of the pixels instead of changing the pixels individually.A novel idea of remainder decision and a spatial-based error correcting is realized with good performance in the extracted phase.The watermark embedded to the image is imperceptible and the extracted watermarks are still recognizable when JPEG compression ratio reaches 27.4% or after severe zero-mean AWGN pollution.If well synchronized

this algorithm can also have good robustness to geometrical attacks such as cropping

scaling and rotating.