Ownership authentication by digital image watermarking based on block truncation coding

Image authentication methods have recently gained great consideration due to their importance for a huge number of multimedia applications. Digital images are increasingly conveyed over vulnerable channels such as the Internet. Protecting digital product is going to become important issue to ensure...

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Main Author:	Tohidi, Faranak
Format:	Thesis
Language:	English
Published:	2013
Subjects:	QA76 Computer software
Online Access:	http://eprints.utm.my/id/eprint/48250/1/FaranakTohidiMFC2013.pdf
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id	my-utm-ep.48250
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spelling	my-utm-ep.482502017-09-20T06:51:49Z Ownership authentication by digital image watermarking based on block truncation coding 2013 Tohidi, Faranak QA76 Computer software Image authentication methods have recently gained great consideration due to their importance for a huge number of multimedia applications. Digital images are increasingly conveyed over vulnerable channels such as the Internet. Protecting digital product is going to become important issue to ensure the secure transmission of the digital items. The existing algorithms cannot guarantee the whole security of the contents or ownership verification. The embedded watermark or data hiding into image can be used to identify the owner of the image. Also, The Block Truncation Coding (BTC) is one of the effective and real time application for data hiding. Most present BTC based watermarking methods cannot completely exploit visual perception of the cover images and do not obtain high data embedding rate. For more exploiting visual perception and high data embedding, an enhanced data hiding scheme based on BTC is proposed. In proposed method, considering the texture sub blocks and Least Significant Bits (LSBs of higher mean value and lower mean value) substitution combine together for designing improved the BTC watermarking scheme. It can obtain good balance between high embedding rate (capacity) and high quality. So, the texture sensitivity is exploited to recognize whether the image blocks or are smooth or complex. On the other hand, the LSB substitution method is employed to hide the indicator bits of each image block or sub block. The experimental results show that the proposed method increases capacity of data hiding compare to existing BTC watermarking with the same or higher quality. 2013 Thesis http://eprints.utm.my/id/eprint/48250/ http://eprints.utm.my/id/eprint/48250/1/FaranakTohidiMFC2013.pdf application/pdf en public http://libraryopac.utm.my/client/en_AU/main/search/results?qu=Ownership+authentication+by+digital+image+watermarking+based+on+block+truncation+coding&te= masters Universiti Teknologi Malaysia, Faculty of Computing Faculty of Computing
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	QA76 Computer software
spellingShingle	QA76 Computer software Tohidi, Faranak Ownership authentication by digital image watermarking based on block truncation coding
description	Image authentication methods have recently gained great consideration due to their importance for a huge number of multimedia applications. Digital images are increasingly conveyed over vulnerable channels such as the Internet. Protecting digital product is going to become important issue to ensure the secure transmission of the digital items. The existing algorithms cannot guarantee the whole security of the contents or ownership verification. The embedded watermark or data hiding into image can be used to identify the owner of the image. Also, The Block Truncation Coding (BTC) is one of the effective and real time application for data hiding. Most present BTC based watermarking methods cannot completely exploit visual perception of the cover images and do not obtain high data embedding rate. For more exploiting visual perception and high data embedding, an enhanced data hiding scheme based on BTC is proposed. In proposed method, considering the texture sub blocks and Least Significant Bits (LSBs of higher mean value and lower mean value) substitution combine together for designing improved the BTC watermarking scheme. It can obtain good balance between high embedding rate (capacity) and high quality. So, the texture sensitivity is exploited to recognize whether the image blocks or are smooth or complex. On the other hand, the LSB substitution method is employed to hide the indicator bits of each image block or sub block. The experimental results show that the proposed method increases capacity of data hiding compare to existing BTC watermarking with the same or higher quality.
format	Thesis
qualification_level	Master's degree
author	Tohidi, Faranak
author_facet	Tohidi, Faranak
author_sort	Tohidi, Faranak
title	Ownership authentication by digital image watermarking based on block truncation coding
title_short	Ownership authentication by digital image watermarking based on block truncation coding
title_full	Ownership authentication by digital image watermarking based on block truncation coding
title_fullStr	Ownership authentication by digital image watermarking based on block truncation coding
title_full_unstemmed	Ownership authentication by digital image watermarking based on block truncation coding
title_sort	ownership authentication by digital image watermarking based on block truncation coding
granting_institution	Universiti Teknologi Malaysia, Faculty of Computing
granting_department	Faculty of Computing
publishDate	2013
url	http://eprints.utm.my/id/eprint/48250/1/FaranakTohidiMFC2013.pdf
_version_	1747817344625803264

Ownership authentication by digital image watermarking based on block truncation coding

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