الفهرس Only 14 pages are availabe for public view
 |  | from | 110 |  |  |
| | | from | 110 | | |
Abstract
This work presents a secure perceptual high capacity data hiding technique. This technique analyzes each cover block and determines the amount of data that can be embedded within it depending on its information. There fore the quality of cover image is kept unaffected and the recovering quality is kept high. The technique also uses a key and generates quasi random distributions to increase the security of embedding process. Additionally, the proposed technique will be enhanced by compressing the message using block truncation coding (BTC) and embedding of the compressed image. Chapter one gives an introduction to the whole thesis and its contents. A brief background of this research area is presented, the motivation, the purpose of this work is proposed. The research objectives, research strategy and contents of this thesis are also discussed Chapter two introduces the main image processing fundamentals as digital image definition, the characteristics of the image which provide different types of operations that can be done on the image are discussed with image digitization that convert the analog media to digital form and consists of two sub-operations: sampling and quantization. In addition different digital image properties sand image quality measures, different image structure, and image pre-processing operation that can be done on the image such as image smoothing are explained. A additionally it presents the basic in-¬¬formation and entropy theory The basic data hiding techniques are reviewed in chapter three with its advantages and draw backs. In Chapter four the methodology 0 the proposed technique is demon started. The experimental results are presented in chapter five, and finally the conclu-sions and future work presented in chapter six.