Implementasi dan Analisis Blind Watermarking Citra Digital dengan Skema CDMA pada Domain Wavelet

ABSTRAKSI: Seiring pertumbuhan dari sistem multimedia memberikan kemudahan dalam penyebaran konten multimedia tersebut, sehingga perlindungan terhadap penyebaran konten, seperti multimedia copyright protection, menjadi persoalan penting. Untuk penyelesaian terhadap masalah ini salah satunya adalah dengan Digital watermarking.Tugas akhir ini mengusulkan implementasi sistem blind watermarking pada citra digital dengan menggunakan skema Code Division Multiple Access (CDMA) pada domain Discrete Wavelet Transform (DWT). DWT merupakan sebuah model yang lebih akurat pada Human Visual System (HVS) dan merupakan sebuh lingkungan yang menjanjikan untuk menerapkan robust watermarking. Sedangkan keuntungan dari CDMA adalah watermark yang direlasikan dengan Pseudo-random Noise (PN Key) sebelum disisipkan pada subband LH dan HL dari citra host yang didekomposisi 1 tingkat. Pengimplementasian dengan skema ini mampu meningkatkan robustness dengan sedikit pengaruh terhadap kualitas citra. Hasil dari pengujian terhadap sistem yang dibangun menunjukkan bahwa skema ini memiliki imperceptiblity yang baik, pada normal copyright hingga copyright dengan ukuran 40x150 pixel, dan juga robust terhadap serangan lossy image compression dan Additive White Gaussian Noise (AWGN).Kata Kunci : blind watermarking, DWT, pseudo-random noise, skema CDMA.ABSTRACT: Along with the growth of the multimedia system, it provides ease in the distribution of multimedia content, thus the protection of distributed content, such as multimedia copyright protection, becomes an important issue. One of many solution for this problem is digital watermarking.This final project proposes an implementation of blind digital image watermarking by using Code Division Multiple Access (CDMA) scheme on Discrete Wavelet Transform (DWT) domain. DWT is an accurate model of the Human Visual System (HVS) and a promising environment to apply robust watermarking. While the advantages of CDMA is a watermark that related with Pseudo-random Noise (PN Key) before being embedded in the LH and HL subband of 1-lv decomposed of host image. Through implementation of this scheme is able to increase robustness with minimal impact on image quality. The testing results, from the system had built, demonstrated that the scheme has a good imperceptiblity for the normal copyright until copyright with 40x150 pixels, and also robust against lossy image compression and Additive White Gaussian Noise (AWGN).Keyword: blind watermarking, DWT, pseudo-random noise, CDMA schem

Towards Optimal Copyright Protection Using Neural Networks Based Digital Image Watermarking

In the field of digital watermarking, digital image watermarking for copyright protection has attracted a lot of attention in the research community. Digital watermarking contains varies techniques for protecting the digital content. Among all those techniques,Discrete Wavelet Transform (DWT) provides higher image imperceptibility and robustness. Over the years, researchers have been designing watermarking techniques with robustness in mind, in order for the watermark to be resistant against any image processing techniques. Furthermore, the requirements of a good watermarking technique includes a tradeoff between robustness, image quality (imperceptibility) and capacity. In this paper, we have done an extensive literature review for the existing DWT techniques and those combined with other techniques such as Neural Networks. In addition to that, we have discuss the contribution of Neural Networks in copyright protection. Finally we reached our goal in which we identified the research gaps existed in the current watermarking schemes. So that, it will be easily to obtain an optimal techniques to make the watermark object robust to attacks while maintaining the imperceptibility to enhance the copyright protection

A review on medicinal properties of saffron toward major diseases

The stigma of Crocus sativus, known as saffron, is one of the most expensive spices in the world. The bioactive components in saffron, picrocrocin, crocin, and safranal, have demonstrated a wide range of uses and capabilities in the medical field. This review is focused on the potential therapeutic applications of saffron on diabetes mellitus (DM), antitumor, anticancer, anti-depressant, Alzheimer’s disease (AD), cardiovascular disease (CVD), erectile dysfunction and antibacterial effects

QAM-DWT-SVD Based Watermarking Scheme for Medical Images

This paper presents a new semi-blind image watermarking system for medical applications. The new scheme utilizes Singular Value Decomposition (SVD) and Discrete Wavelet Transform (DWT) to embed a textual data into original medical images. In particular, text characters are encoded by a Quadrature Amplitude Modulation (QAM-16). In order to increase the security of the system and protect then the watermark from several attacks, the embedded data is submitted to Arnold Transform before inserting it into the host medical image. To evaluate the performances of the scheme, several medical images have been used in the experiments. Simulation results show that the proposed watermarking system ensures good imperceptibility and high robustness against several attacks

Spread Spectrum Watermarking: Principles and Applications in Fading Channel

ISBN 978-953-51-0618-