Adaptive watermarking algorithm for binary image watermarks

Abstract

This paper proposes an adaptive watermarking algorithm, in which the watermark is a binary image such as a logotype related directly to the image owner. Obviously the information amount of this type of watermark is much larger than the amount of a pseudorandom pattern generated by secret key. This fact makes it difficult to embed a bi-dimensional watermark code into a given image in an imperceptible way. To achieve this goal, we propose an imperceptible adaptive embedding algorithm using the JND (Just Noticeable Difference) criterion. The evaluation results show the desirable features of proposed algorithm, such as the watermark imperceptibility and its robustness against attacks such as: JPEG compression, filtering, and impulsive noise.