期刊名称：International Journal of Advanced Computer Research
印刷版ISSN：2249-7277
电子版ISSN：2277-7970
出版年度：2012
卷号：2
期号：7
页码：151-156
出版社：Association of Computer Communication Education for National Triumph (ACCENT)
摘要：Due to excessive proliferation of digital multimedia, the need of protecting the ownership of digital media becomes a major issue. For content protection digital image watermarking plays an important role in Multimedia security fields. Methods developed under this are used to protect Intellectual property rights of digital data such as video, image, audio, etc. without affecting the fidelity of the original data. In this paper we show that if the logo is coded using error correcting codes before being embedded into the watermarked image the robustness of the watermark is increased. Different codes that are taken into consideration in this paper are Hamming and cyclic codes. Here the encoded and embedded watermarked image is considered to be encountering an AWG noise while transmission. We observe that the SNR and PSNR of the watermarked image even in AWGN channel are better when logo is coded before embedding. Also we observe that Hamming codes SNR and PSNR are much more superior to cyclic codes.
关键词：Discrete Wavelet Transform; Error Correcting codes; SNR and PSNR.
