Improving the watermarking performance using combined redundant discrete wavelet transform and contourlet transform scheme
العناوين الأخرى
تحسين أداء التأشير المائي باستخدام مزيج من تحويل المويجات المتقطعة المتكررة و التحويل التخطيطي
مقدم أطروحة جامعية
مشرف أطروحة جامعية
أعضاء اللجنة
al-Hashimi, Rafiq
Atir, Muhammad Abd Allah
الجامعة
جامعة عمان العربية
الكلية
كلية العلوم الحاسوبية و المعلوماتية
القسم الأكاديمي
قسم علم الحاسوب
دولة الجامعة
الأردن
الدرجة العلمية
ماجستير
تاريخ الدرجة العلمية
2012
الملخص الإنجليزي
-The unauthorized use and manipulation of digitized media have created an urgent need to copyright enforcement technologies that can protect copyright ownership and repository of multimedia objects.
One of these technologies is digital image watermarking.
There have been different digital image watermarking methods based on wavelet domain such as Discrete Wavelet Transform (DWT), combined Discrete Wavelet Transform and Discrete Cosine Transform (DWT_DCT), combined Discrete Wavelet Transform and Singular Value Decomposition (DWT_SVD), Redundant Discrete Wavelet Transform (RDWT), combined Redundant Discrete Wavelet Transform and Singular Value Decomposition (RDWT_SVD), and Contourlet.
In this thesis a new method is proposed for digital image watermarking suggesting the combination of RDWT and Contourlet (CT_RDWT/RDWT_CT).
It is expected from this combination to cover multi-scale, time-frequency, localization, shift invariance of RDWT and offers directionality and anisotropy supported by CT that will lead to improve resistance to most of the attacks, and protect copyright and repository.
For all methods, two-level decomposition is applied to the host image, and one-level decomposition is applied to the watermark image.
Embedding the two high frequency midbands in the two high frequency midbands of the host is tested, and then best is chosen for watermarking, watermarked image is exposed to different types of attacks, PSNR value which represents imperceptibility and CORR value which represent robustness are calculated before and after attacks.
Results are reported and conclusions are attained, this is done using set of tools such as: Image Processing ToolBox in Matlab application, Contourlet Toolbox, Set of testing images, Attack methods, Watermarking algorithm.
Results showed that the combination CT_RDWT is better than the combination RDWT_CT.
The proposed technique showed good results in resisting some attacks, but still there are some other methods that showed better results.
التخصصات الرئيسية
الموضوعات
عدد الصفحات
95
قائمة المحتويات
Table of contents.
Abstract.
Abstract in Arabic.
Chapter One : Introduction.
Chapter Two : Literature review.
Chapter Three : Watermarking methods.
Chapter Four : The proposed approach.
Chapter Five : Experimental work and results.
Chapter Six : Conclusions and future work.
References.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Shayib, Fida Mahmud. (2012). Improving the watermarking performance using combined redundant discrete wavelet transform and contourlet transform scheme. (Master's theses Theses and Dissertations Master). Amman Arab University, Jordan
https://search.emarefa.net/detail/BIM-529269
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Shayib, Fida Mahmud. Improving the watermarking performance using combined redundant discrete wavelet transform and contourlet transform scheme. (Master's theses Theses and Dissertations Master). Amman Arab University. (2012).
https://search.emarefa.net/detail/BIM-529269
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Shayib, Fida Mahmud. (2012). Improving the watermarking performance using combined redundant discrete wavelet transform and contourlet transform scheme. (Master's theses Theses and Dissertations Master). Amman Arab University, Jordan
https://search.emarefa.net/detail/BIM-529269
لغة النص
الإنجليزية
نوع البيانات
رسائل جامعية
رقم السجل
BIM-529269
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر