A reversible image watermarking in Hadamard domain

Reversible Watermarking is a special kind of the blind data hiding techniques which allows recovering both the watermark and the original image. In this article, a new reversible watermarking scheme based on a reversible Hadamard transform is proposed. In the proposed method, after calculating the image´s reversible Hadamard transform, the watermark is embedded using prediction error coefficients. The proposed method does not need any location map. This property permits to increase the capacity. To evaluate the performance of the proposed method, a comparative experiment with some well-known reversible methods is performed. The obtained results confirm the efficiency of the method.