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An Improved Blind Color Image Watermarking using DCT in RGB Color Space

by Jaya Jeswani, Tanuja Sarode
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International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Volume 92 - Number 14
Year of Publication: 2014
Authors: Jaya Jeswani, Tanuja Sarode
10.5120/16081-5371

Jaya Jeswani, Tanuja Sarode . An Improved Blind Color Image Watermarking using DCT in RGB Color Space. International Journal of Computer Applications. 92, 14 ( April 2014), 50-56. DOI=10.5120/16081-5371

@article{ 10.5120/16081-5371,
author = { Jaya Jeswani, Tanuja Sarode },
title = { An Improved Blind Color Image Watermarking using DCT in RGB Color Space },
journal = { International Journal of Computer Applications },
issue_date = { April 2014 },
volume = { 92 },
number = { 14 },
month = { April },
year = { 2014 },
issn = { 0975-8887 },
pages = { 50-56 },
numpages = {9},
url = { https://ijcaonline.org/archives/volume92/number14/16081-5371/ },
doi = { 10.5120/16081-5371 },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
}
%0 Journal Article
%1 2024-02-06T22:14:20.976354+05:30
%A Jaya Jeswani
%A Tanuja Sarode
%T An Improved Blind Color Image Watermarking using DCT in RGB Color Space
%J International Journal of Computer Applications
%@ 0975-8887
%V 92
%N 14
%P 50-56
%D 2014
%I Foundation of Computer Science (FCS), NY, USA
Abstract

In this paper a novel blind watermarking technique for color images using DCT has been proposed. Inproposed technique cover image is decomposed into 3 planes, namely R, G, B and for watermarking B plane is selected. B plane is divided into blocks of size 8×8. DCT is applied to each 8×8 sized block and middle frequency coefficients are selected for embedding watermark. Finally binary watermark is embedded into each8×8DCT block by adjusting middle frequency coefficients DCT(4,3) and DCT(5,2). Experimental results shows that the proposed technique is imperceptible as well as robust against wide variety of attacks like Gaussian noise, Salt –pepper noise, Gaussian filter, Median filter, Histogram equalization etc and achieves average PSNR as 58. 90 dB. Proposed technique does not require cover image at the time of watermark extraction then too watermark is extracted completely and better than its counterparts available.

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Index Terms

Computer Science
Information Sciences

Keywords

DCT(Discrete Cosine Transform) MSE(Mean Square Error) NC (Normalized correlation) PSNR(Peak Signal to Noise)

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