Comparison of Digital Image watermarking Methods D
2016-08-23
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The authenticity & copyright protection are two major problems in handling digital multimedia.The Image watermarking is
most popular method for copyright protection by discrete Wavelet Transform (DWT) which performs 2 Level Decomposition of original
(cover) image and watermark image is embedded in Lowest Level (LL) sub band of cover image. Inverse Discrete Wavelet Transform
(IDWT) is used to recover original image from watermarked image. And Discrete Cosine Transform (DCT) which convert image into
Blocks of M bits and then reconstruct using IDCT. In this paper we have compared watermarking using DWT & DWT-DCT methods
performance analysis on basis of PSNR, Similarity factor of watermark and recovered watermark.
most popular method for copyright protection by discrete Wavelet Transform (DWT) which performs 2 Level Decomposition of original
(cover) image and watermark image is embedded in Lowest Level (LL) sub band of cover image. Inverse Discrete Wavelet Transform
(IDWT) is used to recover original image from watermarked image. And Discrete Cosine Transform (DCT) which convert image into
Blocks of M bits and then reconstruct using IDCT. In this paper we have compared watermarking using DWT & DWT-DCT methods
performance analysis on basis of PSNR, Similarity factor of watermark and recovered watermark.
数字
图像
水印
方法
峰值
基础
比较
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