Adaptive Watermarking Scheme in Hybrid DWT-DCT Transform Based on Human Visual System

In this paper we propose a novel hybrid DWT-DCT transform watermarking scheme. The original visually meaningful binary watermark image is preprocessed by using extended Arnold transform.The secret watermark bits are embedded on the singular values of the blocks within low frequency subband in host image hybrid DWT-DCT transform. To embed watermark imperceptibly, robustly and securely, we model the adaptive quantization parameters by considering the human visual system (HVS) characteristics. Experimental results demonstrate that the proposed scheme is robust to variety of attacks. Watermark extraction is efficient and blind in the sense only quantization strategies but not the host image is required.