期刊
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
卷 52, 期 5, 页码 1640-1647出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIM.2003.817155
关键词
discrete cosine transform (DCT); digital watermarking; Joint Photographic Experts Group (JPEG) model; Voronoi diagram
In recent years, digital watermarking techniques have been proposed to protect the copyright of multimedia data. Different watermarking schemes have been suggested for images. The goal of this paper is to develop a watermarking algorithm based on the discrete cosine transform (DCT) and image segmentation. The image is first segmented in different portions based on the Voronoi diagram and features extraction points. Then, a pseudorandom sequence of real numbers is embedded in the DCT domain of each image segment. Different experiments are conducted to show the performance of the scheme under different types of attacks. The results show that our proposed watermark scheme is robust to common signal distortions, including geometric manipulations. The robustness against Joint Photographic Experts Group (JPEG) compression is achieved for a compression ratio of up to 45, and robustness against average, median. and Wiener filters is shown for the 3 x 3 up to 9 x 9 pixel neighborhood. It is observed that robustness against scaling,vas achieved when the watermarked image size is seated down to 0.4% of its original size.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据