The digital image watermarking is an art of hiding secret image into source image. The robust approach of this watermarking practice is to trade-off image quality (invisibility) and embedding capacity. In this proposed article we present an efficient and hybrid approach that integrates features of lifted wavelet transform (LWT) and discrete wavelet transform (DWT) based on linear support vector...

A general watermarking scheme employing lattice quantization is proposed and analyzed. This scheme is based on the equivalence of embedding in digital watermarking and transmission over so-called modulo-Λ channels. Main intention is to increase the maximum data rate which can be transmitted reliably (Shannon capacity of the scheme), tolerating a certain embedding and attack distortion. For this...

There has been a remarkable increase in the data exchange over web and the widespread use of digital media. As a result, multimedia data transfers also had a boost up. The mounting interest with reference to digital watermarking throughout the last decade is certainly due to the increase in the need of copyright protection of digital content. This is also enhanced due to commercial prospective....

Digital watermarking is used for the copyright protection of multimedia documents like image. One problem in it is the desynchronization attacks of the watermark at the receiver. Here a channel model for watermark reception with non perfect synchronization is introduced. Under the given channel model the capacity of SCS water marking and imperfectly synchronized reception is derived. One import...

The aim is to get large Capacity embedding watermark in Audio & to improve strength of audio watermarking technique to intelligent attacks and simple signal exploitation attacks in existing digital Audio watermarking, this paper presented a large capacity digital audio watermarking using 24 bit true colour image used as watermark. The image is decomposed into R, G, B Components & Arnold transfo...

Reversible watermarking is a special branch of image watermarking, that is able to recover the original image after extracting the watermark from the image. In this paper, an adaptive prediction-based reversible watermarking scheme is presented, in order to increase the payload capacity of MRI medical images. The scheme divides the image into two parts, Region of Interest (ROI) and Region of No...

Digital watermarking has attracted lots of researches to healthcare information management systems for access control, patients' data protection, and information retrieval. The well-known quantization index modulation-(QIM-) based watermarking has its limitations as the host image will be destroyed; however, the recovery of medical images is essential to avoid misdiagnosis. In this paper, we pr...

Reversible watermarking enables the embedding of useful information in a host signal without any loss of host information. Tian’s difference-expansion technique is a high-capacity, reversible method for data embedding. However, the method suffers from undesirable distortion at low embedding capacities and lack of capacity control due to the need for embedding a location map. The propose a low d...

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...

Digital watermarking is a process of embedding unobtrusive marks or labels into digital content. These embedded marks are typically imperceptible (invisible) that can later be detected or extracted. This paper describes watermarking process and attacks on watermarks. Also a focus is made on various techniques of implementing watermarks. In general, any watermarking scheme consists of three part...