An Efficient Digital Image Watermarking Based on DCT and Advanced Image Data Embedding Method

Digital image enhancement and digital content or data image secure using DCT and advanced image data embedding method (AIDEM). AIDEM improved robustness based on particle shifting concept is reproduced secure image data and manipulated there’s a robust would like for a digital image copyright mechanism to be placed in secure image data. There’s a necessity for authentication of the content because of the owner. It’s become more accessible for malicious parties to create scalable copies of proprietary content with any compensation to the content owner. Advanced Watermarking is being viewed as a potential goal to the current downside. Astounding watermarking plans are arranged assaults on the watermarked picture are twisted and proposed to give insurance of proprietorship freedoms, information treating, and information uprightness. These methods guarantee unique information recuperation from watermarked information, while irreversible watermarking plans safeguard proprietorship freedoms. This attribute of reversible watermarking has arisen as an applicant answer for the assurance of proprietorship freedoms of information, unfortunate to alterations, for example, clinical information, genetic information, Visa, and financial balance information. These attacks are also intentional or unintentional. The attacks are classified as geometric attacks. This research presents a comprehensive and old method of these techniques that are developed and their effectiveness. Digital watermarking was developed to supply copyright protection and owners’ authentication. Digital image watermarking may be a methodology for embedding some information into digital image sequences, like text image, image data, during this research analysis on image watermarking and attacks on watermarking process time image data, classification of watermarking and applications. We aim to secure image data using advanced image data embedding method (AIDEM) improved robustness based particle shifting concept is reproduced secure image data. To develop compelling digital image watermarking methodology using mat lab tool and reliable and robust

Implementation of Adaptive Digital Image Watermarking Technique in Discrete Wavelet Transform for Copyright Protection

Digital watermarking is used for content protection, content authentication, copyright management and tamper detection. With the use of sophisticated signal / image processing algorithms, manipulations and duplications of audio, images and videos is much easier. Hence copyright of the content has become an urgent and important issue in this world. In this paper, digital image watermarking technique based on discrete wavelet transform and encryptionis proposed. Watermark embedding procedure algorithm using DWT coefficients, scaling factor and scrambling matrix is proposed. The technique results in PNSR greater than 50 dB and is resistance to noise, geometric and compression attack. The proposed technique may be applied for copyright and content authentication applications

Analisis Watermarking Citra Digital Manggunakan Reversible Contrast Mapping

ABSTRAKSI: Watermarking merupakan cabang dari steganography. Watermarking adalah suatu teknik penyembunyian data di dalam data digital (citra, audio, video) namun keberadaannya tidak terlihat oleh indra manusia. Pada kasus content authentication dapat diketahui apakah citra hasil watermarking telah mengalami modifikasi. Apabila hasil ekstraksi citra label watermark berubah maka dapat dipastikan citra terwatermark sempat mengalami modifikasi. Watermarking yang dapat diterapkan pada content authentication yaitu reversible watermarking. Reversible watermarking digunakan pada kasus dimana original host yang digunakan sebagai konten penyisipan sangat berarti dimana degradasi dan distorsi tidak diperkenankan sebagai contoh dalam arsip multimedia, military image processing, dan medical image processing untuk data pasien. Diperlukan adanya pengecekan apakah citra terwatermark telah mengalami perubahan atau tidak. Dengan adanya reversible watermarking sebagai content authentication maka sebuah citra yang terwatermark dapat diketahui apabila sempat di modifikasi oleh pihak tertentu melalui hasil ekstraksi citra label watermark yang telah disisipkan.Dalam tugas akhir ini diimplementasikan dan dianalisis watermarking citra digital menggunakan Reversible Contrast Mapping pada citra digital berformat Bitmap. Reversible contrast mapping merupakan transformasi sederhana pada integer yang di aplikasikan kedalam pair-pair pixel citra digital. Skema ini dilakukan pada domain spatial tanpa menggunakan kompresi pada data yang disisipkan. Dengan memanfaatkan least significant bits (LSBs) untuk penyembunyian data.Kata Kunci : reversible contrast mapping, reversible watermarking, bitmap, least significant bits (LSB), domain spatial.ABSTRACT: Watermarking is a branch of steganography. Watermarking is a technique to inserted data into digital host (image digital, audio, video) however it does not look by the people. In content authentication, host image known modified by extracting the watermark. If the watermark is not decidely, we conclude that the host image has been modified. One example watermarking for content authentication is reversible watermarking. Reversible watermarking is used in case when the original host is very important that does not allow any degradation and distorsion like multimedia archieves, military image processing and medical image processing to patient. So the content authentication is needed to verify the host image. By reversible watermarking implement to content authentication we know if the image has been modified or not by ectracting label watermark.In this final project, it will be implemented and analysed digital image watermarking by reversible contrast mapping based on bitmap digital image. Reversible contrast mapping is a simple integer transform that applies to pairs of pixels. This scheme based on spatial domain without any data compression in inserted data. This scheme using least significant bits (LSB) to do insertion.Keyword: reversible contrast mapping, reversible watermarking, bitmap, least significant bits (LSB), spatial domain