Perceptual Image Watermarking Algorithm Based on Magic Squares Scrambling in DWT

In order to improve the robustness of image, the perceptual image watermarking algorithm based on blocks in DWT is raised in this text. It first make the watermarking images into blocks based on cipher, the blocks scale is then decided by the watermarking images´ intricacy, to discrete the host image through Haar wavelet transform. Embed the scrambling ciphered binary watermarking image into the Haar wavelet low-frequency band. Through the prove of emulation experiment, this algorithm has good robustness to noise, JPEG compress, cut, smoothing filtering and other processing of distortion image.