A Novel Multiple Digital Watermarking Scheme for the Copyright Protection of Image

In this paper, an improved dual-wrap watermarking scheme was proposed that is based on HLC watermarking scheme. HLC watermarking scheme has many advantages, however, it has the ambiguity problem. This paper solves the problem of HLC watermarking scheme and provides similar robustness. The experimental results show that the proposed scheme is unambiguity and robustness.