Please use this identifier to cite or link to this item: http://hdl.handle.net/10603/310750
Title: Analysis and implementation of dual image watermarking cyber watermarking in cyber security
Researcher: Lakshmi priya A
Guide(s): Letitia S
Keywords: Engineering and Technology
Engineering
Engineering Electrical and Electronic
watermarking
cyber security
University: Anna University
Completed Date: 2018
Abstract: Now days so many people have regular web access and use application like email, instant messaging, and social networking, online messaging, etc. To speed up this communication, there is need of digital media like Text, Image, Audio, and Video. These media transfers over an open public network, hence there is need to protect these data. From all these digital media,,Digital image is most widely transferring files over the network than any other but in most unsecure manner. So that some system must be there making them secure from threats and different kind of attacks over the network. This research work develops an image watermarking technique with hybridization of spatial and frequency domain image watermarking techniques. Here, this work is divided in two parts: watermark embedding and watermark extracting. There is hybridization of three techniques: DWT, DCT and SVD used in both parts watermark embedding and extracting. DWT (Discrete Wavelet Transform) is wavelet based transform that gives information about image in both frequency and spatial domain. DWT gives higher robustness, but the quality of the image is degrading. DCT (Discrete Cosine Transform) is orthogonal transform that transform image spatial domain to frequency domain. DCT gives better quality of image with less processing power. In this work an improved SVD-ARNOLD-LSVR algorithm; the host image of size 512 x 512 is embedded with the watermarks of size 128 x 128. To prove the reliability of the algorithm several images are analyzed and the samples alone taken into account. This algorithm enhances the visual impreceivability of the watermarked image and robustness against various removals and geometric attack newline
Pagination: xix, 172p.
URI: http://hdl.handle.net/10603/310750
Appears in Departments:Faculty of Information and Communication Engineering

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01_title.pdfAttached File45.34 kBAdobe PDFView/Open
02_certificates.pdf3.67 MBAdobe PDFView/Open
03_abstracts.pdf28.43 kBAdobe PDFView/Open
04_acknowledgements.pdf27.04 kBAdobe PDFView/Open
05_contents.pdf118.65 kBAdobe PDFView/Open
06_listofabbreviations.pdf30.91 kBAdobe PDFView/Open
07_chapter1.pdf148 kBAdobe PDFView/Open
08_chapter2.pdf95.62 kBAdobe PDFView/Open
09_chapter3.pdf723.75 kBAdobe PDFView/Open
10_chapter4.pdf539.75 kBAdobe PDFView/Open
11_chapter5.pdf950.51 kBAdobe PDFView/Open
12_chapter6.pdf188.95 kBAdobe PDFView/Open
13_conclusion.pdf52.82 kBAdobe PDFView/Open
14_references.pdf49.44 kBAdobe PDFView/Open
15_listofpublications.pdf15.84 kBAdobe PDFView/Open
80_recommendation.pdf118 kBAdobe PDFView/Open


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