This paper is an attempt to describe a new scheme of image watermarking based on 5/3 wavelet decomposition and turbo-code. This new watermarking algorithm based on embedding mark (signature) in the multi-resolution field. For the purpose of increasing the image watermarking robustness against attacks of an image transmission, we encode with a turbo code an image-embedded mark. This new scheme o...

Ownership authentication and copyright protection of image has achieved a sharp attention due to easy and global availability of internet services. Illegal copying and misappropriation of digital image leads cyber crime in an epidemic form. Invisible watermarking technique is one of the leading solutions towards violation of ownership authentication problem without deteriorating the quality of ...

This paper presents a new spread-spectrum watermarking algorithm for digital images in discrete wavelet transform (DWT) domain. The algorithm is applied for embedding watermarks like patient identification /source identification or doctors signature in binary image format into host digital radiological image for potential telemedicine applications. Performance of the algorithm is analysed by va...

-------------------------------------------------------Abstract----------------------------------------------------------Digital watermarking is process of embedding information into a digital signal which is used to know about its authencity or identity of its owners and producers in the same manner as document having a bench mark for visible identification. This paper presents an innovative w...

In this paper, a robust watermarking scheme using optimization watermarking technique is proposed. In the proposed scheme, the watermark image is to embed in the SCS transform domain. The advantage is that they are able to detect malicious tampering while being robust against content-preserving processes such as compression, filtering and Salt and pepper noise, and we plotted graphs for average...

Digital watermarking is the field of digital image processing which deals with hiding information in a digital content. In this paper, performance analysis of DCT (Discrete Cosine Transform) based digital image watermarking using color spaces is done. Mostly, images that are taken for digital watermarking experiments are in RGB (Red, Green and Blue) color space. Eight different color spaces are...

Techniques to establish the authenticity and integrity of digital images are becoming increasly essential over the Intermet. The authentication algorithm should distinguish malicious manipulations from the original watermarked image[1]. Fragile watermarking is recomended for a very sensible image authentication scheme, able to localize the slightest changes occured to the marked image. The frag...

Detecting the watermark from the rescanned image is still a challenging problem, especially for high resolution image. After printing and scanning, an image usually suffers global geometric distorts ( such as rotation, scaling, translation and cropping), local random nonlinear geometric distortions which is simulated in Random Bending function of Stirmark, as well as nonlinear pixel value disto...

The security of digital image watermarking is improved by scrambling the watermark using different chaotic maps or cellular automata in such a way that an unauthorized person can’t recover the watermark without the secret keys. In this proposed scheme three secret keys are used in which one key is used to make the watermark chaotic and other two keys are used for scrambling the cover image. In ...

An image watermarking scheme based on singular value decomposition and visual cryptography in discrete wavelet transform is proposed. We start with a survey of the current image watermarking technologies, and have noticed that majority of the existing schemes are not capable of resisting all attacks. We propose the idea to use of singular value decomposition and visual cryptography in discrete ...