Robust Watermarking Method using QIM with VSS for Image Copyright Protection

Abstract

This paper proposes a new watermarking method
for digital image by composing the DWT-QIM based embedding with visual secret sharing (VSS) method. Firstly, the
watermark image is separated into n shares by using the kout-of-n method, also called (k,n) visual secret sharing. One
of the s is embeded into the original image for copyright
protection. The other (n-1) shares are registered with Vietnam
Copyright Department. When a dispute happens, the verifier
can extract the watermark information from the watermarked
image, then, decode it with (k-1) shares chosen from (n-1)
shares to retrieve the copyright information. Our experimental
results show that our proposed method works efficiently on
protecting the copyright of digital images.