Digital Image Watermarking is a technique for inserting information into an image that can be later extracted for a variety of purpose including identification, ownership authentication, and copyright protections. The goal of this paper is to design a secure watermarking scheme in spatial domain to identify the true buyer and to protect the ownership copyright of digital still images. The schem...

A semi fragile, public key based digital signature scheme to verify and authenticate digital images is proposed. The scheme computes a content dependent feature value for each block of DCT coefficients of the original image. This feature is signed and then embedded into the selected DCT coefficients of the image as watermark. The technique aims to circumvent the cut and paste attacks by incorpo...

We propose an oblivious watermarking technique for tamper detection in digital images. By comparing correlation values from different portions of the image, the technique enables us to distinguish malicious changes, such as replacing / adding features from nonmalicious changes resulting from common image processing operations. The technique can be implemented with small memory and computational...

With the rapid development and wide use of the Internet, information transmission faces a big confront of security. People need a protected and safe way to spread information. Digital watermarking is a procedure of data hiding, which provide security of data. The Digital watermarking method provides the quick and inexpensive distribution of digital information over the Internet. This technique ...

robust, watermarking, invisible This paper addresses the problem of watermarking a digital image, in order to detect or verify ownership. An invisible and resilient watermark is one that is not ordinarily visible and is robust in the face of common image manipulations such as lossy compression, scaling, cropping, rotation, reflection, and brightness/contrast adjustment. A watermarking scheme is...

Sachin Goyal Department of Information Technology U.I.T, R.G.P.V, Bhopal Roopam Gupta Department of Information Technology U.I.T, R.G.P.V, Bhopal ABSTRACT Digital media security is the principal concern in the today’s technological world. Due to easy production, transmission and dissemination of digital data, security threats occur while dealing with digital data. Digital watermarking is one o...

Keywords: Digital image watermarking Human visual system GA-BPN Hybrid intelligent system Robustness Discrete wavelet domain Peak-signal-to-noise ratio Normalized cross–correlation a b s t r a c t In this paper, a novel watermarking scheme is proposed by embedding a binary watermark into gray-scale images using a hybrid GA-BPN intelligent network. HVS characteristics of the images in DCT domain...

Digital watermarking is a technique for copyright protection of multimedia products such as digital images, which embeds a watermark into a host image. The main challenge in image watermarking is the development of new robust methods against different attacks. This paper presents a robust blind watermarking scheme based on multiwavelet transform (MWT) and singular value decomposition (SVD). By ...

Protection of Medical image contents becomes the important issue in computer network security. Lossless Watermarking has becomes a promising technique for medical content authentication, it allows to embed relevant information with the image, which provides confidentiality, integrity and authentication by embedding Digital Signature (DS) with the Medical image. In this paper we focus on need fo...