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Block-based Watermarking for Color Images using DCT and DWT

by A. F. El Gamal, N. A. Mosa, W. K. El Said
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International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Volume 66 - Number 15
Year of Publication: 2013
Authors: A. F. El Gamal, N. A. Mosa, W. K. El Said
10.5120/11163-6286

A. F. El Gamal, N. A. Mosa, W. K. El Said . Block-based Watermarking for Color Images using DCT and DWT. International Journal of Computer Applications. 66, 15 ( March 2013), 33-40. DOI=10.5120/11163-6286

@article{ 10.5120/11163-6286,
author = { A. F. El Gamal, N. A. Mosa, W. K. El Said },
title = { Block-based Watermarking for Color Images using DCT and DWT },
journal = { International Journal of Computer Applications },
issue_date = { March 2013 },
volume = { 66 },
number = { 15 },
month = { March },
year = { 2013 },
issn = { 0975-8887 },
pages = { 33-40 },
numpages = {9},
url = { https://ijcaonline.org/archives/volume66/number15/11163-6286/ },
doi = { 10.5120/11163-6286 },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
}
%0 Journal Article
%1 2024-02-06T21:22:31.026279+05:30
%A A. F. El Gamal
%A N. A. Mosa
%A W. K. El Said
%T Block-based Watermarking for Color Images using DCT and DWT
%J International Journal of Computer Applications
%@ 0975-8887
%V 66
%N 15
%P 33-40
%D 2013
%I Foundation of Computer Science (FCS), NY, USA
Abstract

This paper presents the hybrid image watermarking algorithm for color images based on Discrete Cosine Transform (DCT) and Discrete Wavelet Transform (DWT). The cover image is converted from RGB color space into YCbCr color space, then the luminance component is partitioned into non-overlapping blocks of pixels according to the number of bits of the original watermark; and DCT conversion is performed for each block separately. After DCT transformation, the DWT is performed and vertical component, LH is taken out for embedding the watermark. Finally, the watermark information is embedded using new mathematical formula. Simulation results show that this method is imperceptible and robust with respect to a wide variety of conventional attacks like noise addition, filtering, cropping and JPEG compression.

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Index Terms

Computer Science
Information Sciences

Keywords

Color Image Watermarking Discrete Cosine Transform Discrete Wavelet Transform Restoration Parameter

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