An improvement of RGB color image watermarking technique using ISB stream bit and Hadamard matrix

In the past half century, the advancement of internet technology has been rapid and widespread. The innovation provides an efficient platform for human communication and other digital applications. Nowadays, everyone can easily access, copy, modify and distribute digital contents for personal or com...

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Main Author:	Mohammed, Ramadhan Ali
Format:	Thesis
Language:	English
Published:	2014
Subjects:	QA75 Electronic computers Computer science
Online Access:	http://eprints.utm.my/id/eprint/78348/1/RamadhanAliMohammedMFC20141.pdf
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spelling	my-utm-ep.783482018-08-26T11:52:01Z An improvement of RGB color image watermarking technique using ISB stream bit and Hadamard matrix 2014-01 Mohammed, Ramadhan Ali QA75 Electronic computers. Computer science In the past half century, the advancement of internet technology has been rapid and widespread. The innovation provides an efficient platform for human communication and other digital applications. Nowadays, everyone can easily access, copy, modify and distribute digital contents for personal or commercial gains. Therefore, a good copyright protection is required to discourage the illicit activities. On way is to watermark the assets by embedding an owner's identity which could later on be used for authentication. Thus far, many watermarking techniques have been proposed which focus on improving three standard measures, visual quality or imperceptibility, robustness and capacity. Although their performances are encouraging, there are still plenty of rooms for improvements. Thus, this study proposes a new watermarking technique using Least Significant Bit (LSB) insertion approach coupled with Hadamard matrix. The technique involves four main stages: Firstly, the cover image is decomposed into three separate channels, Red, Green and Blue. Secondly, the Blue channel is chosen and converted into an eight bit stream. Thirdly, the second least signification bit is selected from the bit stream for embedding. In order to increase the imperceptibility a Hadamard matrix is used to find the best pixels of the cover image for the embedding task. Experimental results on standard dataset have revealed that average PSNR value is greater than 58db, which indicates the watermarked image is visually identical to its original. However, the proposed technique suffers from Gaussian and Poisson noise attacks. 2014-01 Thesis http://eprints.utm.my/id/eprint/78348/ http://eprints.utm.my/id/eprint/78348/1/RamadhanAliMohammedMFC20141.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:81550 masters Universiti Teknologi Malaysia, Faculty of Computing Faculty of Computing
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	QA75 Electronic computers Computer science
spellingShingle	QA75 Electronic computers Computer science Mohammed, Ramadhan Ali An improvement of RGB color image watermarking technique using ISB stream bit and Hadamard matrix
description	In the past half century, the advancement of internet technology has been rapid and widespread. The innovation provides an efficient platform for human communication and other digital applications. Nowadays, everyone can easily access, copy, modify and distribute digital contents for personal or commercial gains. Therefore, a good copyright protection is required to discourage the illicit activities. On way is to watermark the assets by embedding an owner's identity which could later on be used for authentication. Thus far, many watermarking techniques have been proposed which focus on improving three standard measures, visual quality or imperceptibility, robustness and capacity. Although their performances are encouraging, there are still plenty of rooms for improvements. Thus, this study proposes a new watermarking technique using Least Significant Bit (LSB) insertion approach coupled with Hadamard matrix. The technique involves four main stages: Firstly, the cover image is decomposed into three separate channels, Red, Green and Blue. Secondly, the Blue channel is chosen and converted into an eight bit stream. Thirdly, the second least signification bit is selected from the bit stream for embedding. In order to increase the imperceptibility a Hadamard matrix is used to find the best pixels of the cover image for the embedding task. Experimental results on standard dataset have revealed that average PSNR value is greater than 58db, which indicates the watermarked image is visually identical to its original. However, the proposed technique suffers from Gaussian and Poisson noise attacks.
format	Thesis
qualification_level	Master's degree
author	Mohammed, Ramadhan Ali
author_facet	Mohammed, Ramadhan Ali
author_sort	Mohammed, Ramadhan Ali
title	An improvement of RGB color image watermarking technique using ISB stream bit and Hadamard matrix
title_short	An improvement of RGB color image watermarking technique using ISB stream bit and Hadamard matrix
title_full	An improvement of RGB color image watermarking technique using ISB stream bit and Hadamard matrix
title_fullStr	An improvement of RGB color image watermarking technique using ISB stream bit and Hadamard matrix
title_full_unstemmed	An improvement of RGB color image watermarking technique using ISB stream bit and Hadamard matrix
title_sort	improvement of rgb color image watermarking technique using isb stream bit and hadamard matrix
granting_institution	Universiti Teknologi Malaysia, Faculty of Computing
granting_department	Faculty of Computing
publishDate	2014
url	http://eprints.utm.my/id/eprint/78348/1/RamadhanAliMohammedMFC20141.pdf
_version_	1747817967291203584

An improvement of RGB color image watermarking technique using ISB stream bit and Hadamard matrix

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