Dual watermarking algorithm for copyright protection of digital images
一种用于版权保护的数字图像双水印算法

A dual watermarking algorithm that accepted JPEG compression was presented.The original image was first segmented into blocks based on the texture property,and different embedding intensities were used to embed the watermarking into the Discrete Cosine Transform(DCT) domain of the original image to indicate ownership of the image.And then the invisible watermarking was embedded into the high frequence part to verify ownership of the image.The experiment shows that the proposed dual watermarking system can indicate and verify the ownership.