TY - JFULL AU - Krishnamoorthi R. and Sheba Kezia Malarchelvi P. D. PY - 2009/12/ TI - Image Adaptive Watermarking with Visual Model in Orthogonal Polynomials based Transformation Domain T2 - International Journal of Computer and Information Engineering SP - 2659 EP - 2667 VL - 3 SN - 1307-6892 UR - https://publications.waset.org/pdf/6832 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 35, 2009 N2 - In this paper, an image adaptive, invisible digital watermarking algorithm with Orthogonal Polynomials based Transformation (OPT) is proposed, for copyright protection of digital images. The proposed algorithm utilizes a visual model to determine the watermarking strength necessary to invisibly embed the watermark in the mid frequency AC coefficients of the cover image, chosen with a secret key. The visual model is designed to generate a Just Noticeable Distortion mask (JND) by analyzing the low level image characteristics such as textures, edges and luminance of the cover image in the orthogonal polynomials based transformation domain. Since the secret key is required for both embedding and extraction of watermark, it is not possible for an unauthorized user to extract the embedded watermark. The proposed scheme is robust to common image processing distortions like filtering, JPEG compression and additive noise. Experimental results show that the quality of OPT domain watermarked images is better than its DCT counterpart. ER -