Simple and robust watermarking scheme based on square-root-modulus technique

Abstract

In this paper, we present a simple and robust watermarking scheme for color images. The scheme is based on the square-root-modulus technique employed in the integer wavelet domain, which allows a large number of data bits to be embedded in a host image. Simulations confirmed that marked images generated by the proposed scheme are tolerant to various attacks such as blurring, brightness, contrast, cropping, edge sharpening, inversion, JPEG/JPEG2000 compressions, noise-additions, and truncation. Additionally, the payload of the proposed method is significantly larger than that of existing watermarking techniques and the resulting perceived quality is not bad. Because the code is quite simple, it is suitable for the proposed method implemented in the mobile equipments or smart devices.