A comparison of discrete cosine transform and discrete wavelet transform algorithm in watermarking against common attacks

Digital watermarking is a technique to embed additional data to digital images, audios and videos without affecting the quality of the original image. Watermark can be extracted for ownership verification or authentication. Currently, there is no comparison documented done between Discrete Cosine Tr...

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Main Author:	Said, Mohamed Abdisalan
Format:	Thesis
Language:	English English English
Published:	2015
Subjects:	QA76 Computer software
Online Access:	http://eprints.uthm.edu.my/1358/2/MOHD%20ABDISALAN%20SAID%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/1358/1/24p%20MOHD%20ABDISALAN%20SAID.pdf http://eprints.uthm.edu.my/1358/3/MOHD%20ABDISALAN%20SAID%20WATERMARK.pdf
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spelling	my-uthm-ep.13582021-10-03T06:35:03Z A comparison of discrete cosine transform and discrete wavelet transform algorithm in watermarking against common attacks 2015-02 Said, Mohamed Abdisalan QA76 Computer software Digital watermarking is a technique to embed additional data to digital images, audios and videos without affecting the quality of the original image. Watermark can be extracted for ownership verification or authentication. Currently, there is no comparison documented done between Discrete Cosine Transform (DCT) and Discrete Wavelet Transform (DWT). In this report, the DCT watermarking algorithms and DWT watermarking algorithms were compared based on robustness and imperceptibility criteria. With DCT, the watermark bits were embedded into the mid-band coefficients of the DCT in the cover image where the DWT algorithm was embedded the watermark bits into the horizontal and vertical sub-bands of DWT in the cover image. Experimental results had shown that the watermark is robust to geometric attacks and removal attacks. DCT and DWT are compared with regard to peak signal to noise ratio (PSNR), Mean Square Error (MSE) and Normalized Correlation (NC). The PSNR value of the watermarked Lena image in DWT is 47, higher than the DCT which is 44. The Normalized Correlation (NC) also had clarified that the extracted watermark in DWT 0.9964 is greater than the extracted watermark in DCT 0.2057. Thus, the results had indicated that the DWT gives better image quality than DCT. 2015-02 Thesis http://eprints.uthm.edu.my/1358/ http://eprints.uthm.edu.my/1358/2/MOHD%20ABDISALAN%20SAID%20COPYRIGHT%20DECLARATION.pdf text en staffonly http://eprints.uthm.edu.my/1358/1/24p%20MOHD%20ABDISALAN%20SAID.pdf text en public http://eprints.uthm.edu.my/1358/3/MOHD%20ABDISALAN%20SAID%20WATERMARK.pdf text en validuser mphil masters Universiti Tun Hussein Onn Malaysia Faculty of Computer Science and Information Technology
institution	Universiti Tun Hussein Onn Malaysia
collection	UTHM Institutional Repository
language	English English English
topic	QA76 Computer software
spellingShingle	QA76 Computer software Said, Mohamed Abdisalan A comparison of discrete cosine transform and discrete wavelet transform algorithm in watermarking against common attacks
description	Digital watermarking is a technique to embed additional data to digital images, audios and videos without affecting the quality of the original image. Watermark can be extracted for ownership verification or authentication. Currently, there is no comparison documented done between Discrete Cosine Transform (DCT) and Discrete Wavelet Transform (DWT). In this report, the DCT watermarking algorithms and DWT watermarking algorithms were compared based on robustness and imperceptibility criteria. With DCT, the watermark bits were embedded into the mid-band coefficients of the DCT in the cover image where the DWT algorithm was embedded the watermark bits into the horizontal and vertical sub-bands of DWT in the cover image. Experimental results had shown that the watermark is robust to geometric attacks and removal attacks. DCT and DWT are compared with regard to peak signal to noise ratio (PSNR), Mean Square Error (MSE) and Normalized Correlation (NC). The PSNR value of the watermarked Lena image in DWT is 47, higher than the DCT which is 44. The Normalized Correlation (NC) also had clarified that the extracted watermark in DWT 0.9964 is greater than the extracted watermark in DCT 0.2057. Thus, the results had indicated that the DWT gives better image quality than DCT.
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Said, Mohamed Abdisalan
author_facet	Said, Mohamed Abdisalan
author_sort	Said, Mohamed Abdisalan
title	A comparison of discrete cosine transform and discrete wavelet transform algorithm in watermarking against common attacks
title_short	A comparison of discrete cosine transform and discrete wavelet transform algorithm in watermarking against common attacks
title_full	A comparison of discrete cosine transform and discrete wavelet transform algorithm in watermarking against common attacks
title_fullStr	A comparison of discrete cosine transform and discrete wavelet transform algorithm in watermarking against common attacks
title_full_unstemmed	A comparison of discrete cosine transform and discrete wavelet transform algorithm in watermarking against common attacks
title_sort	comparison of discrete cosine transform and discrete wavelet transform algorithm in watermarking against common attacks
granting_institution	Universiti Tun Hussein Onn Malaysia
granting_department	Faculty of Computer Science and Information Technology
publishDate	2015
url	http://eprints.uthm.edu.my/1358/2/MOHD%20ABDISALAN%20SAID%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/1358/1/24p%20MOHD%20ABDISALAN%20SAID.pdf http://eprints.uthm.edu.my/1358/3/MOHD%20ABDISALAN%20SAID%20WATERMARK.pdf
_version_	1747830774386655232

A comparison of discrete cosine transform and discrete wavelet transform algorithm in watermarking against common attacks

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