tailieunhanh - Effective SVD-YCBCR color image watermarking

In this paper, a blocked-SVD based color image watermarking scheme is proposed in which, to embed the color watermark, two levels SVD are applied on Y channel of the converted host image. Moreover, to more security, imperceptibility and robustness, the watermark insertion is done using zigzag method on nonoverlapping blocks. | International Journal of Computer Networks and Communications Security VOL. 3, NO. 3, MARCH 2015, 110–116 Available online at: E-ISSN 2308-9830 (Online) / ISSN 2410-0595 (Print) EFFECTIVE SVD-YCBCR COLOR IMAGE WATERMARKING FARZANEH SARKARDEH1 and MEHDI KHALILI2 1 2 . Student, Dept. Computer and Informatics Engineering ,PayameNoor University, Tehran, Iran Assistant Professor, Dept. Computer and Informatics Engineering ,PayameNoor University, Tehran, Iran E-mail: , ABSTRACT In this paper, a blocked-SVD based color image watermarking scheme is proposed in which, to embed the color watermark, two levels SVD are applied on Y channel of the converted host image. Moreover, to more security, imperceptibility and robustness, the watermark insertion is done using zigzag method on nonoverlapping blocks. The experimental results reveal that the proposed algorithm not only satisfies the imperceptibility and watermarking robustness against different signal processing attacks such as JPEG compression, scaling, blurring, rotation, noising, filtering and etc., as well, rather, has better values compared to the existing works. Keywords: Color Image Watermarking, SVD, Zigzag Method, Ycbcr Color Space. 1 INTRODUCTION Nowadays, digital watermarking has become an important issue. Because, it can be used as an effective tool for copyright protection of digital documents. Digital watermarking hide the information in to different documents such as audio, image, video, and text, so that the hidden information can be extracted without any errors, using the unique way, to make an assertion by the owner of the object [1], [2]. According to domains, watermark insertion is divided into two broad groups: spatial-domain and frequency-domain methods. Embedding the watermark into the spatial-domain component of the host image is the direct method. This has the advantages of low complexity and easy implementation. However, the .