Technique de protection de biens numériques par un filigrane texte ou image

Abstract

This work presents an image watermarking method with blind detection based on amplitude modulation. Basically, the watermark embedding is performed by modifying the pixel values in the blue channel of an image, while the watermark retrieval is achieved by using a prediction technique based on a linear combination of nearby pixel values around the embedded pixels. The experimental results obtained in this work clearly show the effectiveness and robustness of the proposed method and present a few improvements over the published methods of watermarking based on amplitude modulation.