A Robust Watermarking Algorithm for Colour Imagefull text in English

摘要

In this paper, a robust and transparent watermarking scheme for colour images is proposed. The colour featuresfor the human visual system are utilized to design the colour watermarking algorithm. The basic idea is to embedthe invisible watermark into the colour image by brightness adjustment and feature component choice. Andthrough analysis and constraint the conditions, we can obtain a high detection probability and security, a low falsealarm probability. At the same time, because we use different matrix operation to embed (secret key) and extract(public key) a watermark. We are able to release all information for the public, except the secret key. Our methodcan extract the embedded watermark without reference image. The robustness of our method is demonstrated byvarious attacks through computer simulation.