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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
http://eprints.uthm.edu.my/1358/
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spelling my.uthm.eprints.13582021-10-03T06:35:03Z http://eprints.uthm.edu.my/1358/ A comparison of discrete cosine transform and discrete wavelet transform algorithm in watermarking against common attacks 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 NonPeerReviewed text en http://eprints.uthm.edu.my/1358/2/MOHD%20ABDISALAN%20SAID%20COPYRIGHT%20DECLARATION.pdf text en http://eprints.uthm.edu.my/1358/1/24p%20MOHD%20ABDISALAN%20SAID.pdf text en http://eprints.uthm.edu.my/1358/3/MOHD%20ABDISALAN%20SAID%20WATERMARK.pdf Said, Mohamed Abdisalan (2015) A comparison of discrete cosine transform and discrete wavelet transform algorithm in watermarking against common attacks. Masters thesis, Universiti Tun Hussein Onn Malaysia.
institution Universiti Tun Hussein Onn Malaysia
building UTHM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tun Hussein Onn Malaysia
content_source UTHM Institutional Repository
url_provider http://eprints.uthm.edu.my/
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
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
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
http://eprints.uthm.edu.my/1358/
_version_ 1738580849355390976
score 13.211869

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