題名: Copyright Protection by Watermarking for Color Images against Rotation and Scaling Attacks Using Peak Detection and Synchronization in
Discrete Fourier Transform Domain 作者: Yen-Chung Chiu
Wen-Hsiang Tsai 貢獻者: Asia University
日期: 2004
上傳時間: 2009-10-23T07:30:43Z
摘要: A watermarking method for copyright protection of color images against rotation and scaling attacks is proposed. A watermark is embedded in an input image as coefficient-value peaks circularly and symmetrically distributed in a middle band of the
discrete Fourier transform (DFT) domain of the input image. By detecting the peaks in the DFT domain of the resulting stego-image, the
embedded watermark can be extracted for copyright proof, even after the stego-image is attacked by rotation and rescaling.
Experimental results showing the effectiveness of the proposed method are also included.