Developing a robust digital image watermark by using frequency and spatial domains
Other Title(s)
تطوير علامة مائية صلدة للصور الرقمية باستخدام المجالين الترددي و المكاني
Dissertant
Thesis advisor
Comitee Members
Rawashidah, Adnan
Kasasibah, Basil
University
Amman Arab University
Faculty
Collage of Computer Sciences and Informatics
Department
Department of Computer Science
University Country
Jordan
Degree
Master
Degree Date
2010
English Abstract
The rapid growth of the internet, and the speed of file transfers caused the digitalization of media assets, so many illegal copies of images, music titles, and video films appeared.
As a countermeasure mechanism; digital watermarking took its role to protect these digital assets and associated rights.
In this thesis a new approach is presented for private digital image watermarking, the meaning of private, here, is the images that could not be found on public resources like Internet.
It combines two domains for watermark embedding, the frequency domain particularly Discrete Wavelet Transform (DWT), and the spatial domain particularly Least Significant Bit (LSB).
The proposed watermarking algorithm operates in the Discrete Wavelet Transform (DWT) to separate the image into a lower resolution approximation image (LL1) as well as Horizontal (HL1), Vertical (LH1) and Diagonal (HH1) detail components.
The process can then be repeated to compute multiple “scale” wavelet decomposition.
Specific coefficients from the vertical detail components are selected and transformed to binary code then the system picks one of the least significant bits for each number according to the number of ones in the most significant part and replace it with one bit from the watermark message.
Then the Inverse Discrete Wavelet Transform (IDWT) is applied to the transformed image to obtain the watermarked image.
This algorithm has been tried against many attacks like lossy compression, noise addition, cropping, and some other attacks against its robustness.
It achieved a high success of increasing robustness of the proposed watermark, with little or no additional impact on image quality.
Main Subjects
Topics
No. of Pages
94
Table of Contents
Table of contents.
Abstract.
Abstract in Arabic.
Chapter One : Introduction.
Chapter Two : Literature survey.
Chapter Three : The proposed method.
Chapter Four : Experimental results.
Chapter Five : Conclusions and future work.
References.
American Psychological Association (APA)
Hassan, Wisam Ahmad. (2010). Developing a robust digital image watermark by using frequency and spatial domains. (Master's theses Theses and Dissertations Master). Amman Arab University, Jordan
https://search.emarefa.net/detail/BIM-526513
Modern Language Association (MLA)
Hassan, Wisam Ahmad. Developing a robust digital image watermark by using frequency and spatial domains. (Master's theses Theses and Dissertations Master). Amman Arab University. (2010).
https://search.emarefa.net/detail/BIM-526513
American Medical Association (AMA)
Hassan, Wisam Ahmad. (2010). Developing a robust digital image watermark by using frequency and spatial domains. (Master's theses Theses and Dissertations Master). Amman Arab University, Jordan
https://search.emarefa.net/detail/BIM-526513
Language
English
Data Type
Arab Theses
Record ID
BIM-526513
