The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper proposes an algorithm to perform robust digital watermarking through image scrambling and singular value decomposition (SVD). Both the watermark and the carrier are images, and the proposed algorithm aim to ensure the robustness and perceptual invisibility of the embedded watermark. The proposed algorithm first performs a scrambling encryption on the watermark and carrier images. The scrambled...
A novel method is proposed which deals with secure extraction of data by utilizing transform based image watermarking techniques. The image is embedded with a watermark using a combination of Discrete Cosine Transform (DCT), Discrete Fourier Transform (DFT) and Discrete Wavelet Transform (DWT) in this scheme. The conventional transforms are applied in an optimized mode in these schemes in different...
Nowadays, three-dimensional meshes have been extensively used in several applications such as, industrial, medical, computer-aided design (CAD) and entertainment due to the processing capability improvement of computers and the development of the network infrastructure. Unfortunately, like digital images and videos, 3-D meshes can be easily modified, duplicated and redistributed by unauthorized users...
The telemedicine is a medical practice which consists in using new technologies of information and communication (NTIC). It makes it possible to facilitate the transfer and diagnosis of several medical data at distance. The security of medical images plays an important role to ensure and guarantee the integrity and confidentiality. This paper presents a robust multiple watermarking which combine discrete...
This paper proposes a new adaptive watermarking algorithm leveraging combined knowledge of spatial and frequency domains to ensure the robustness and security of the embedded watermark and the transparency of the carrier image. The scheme makes use of the perceptual characteristics of human visual system and the local correlation of the image. The wavelet coefficients of the image are divided into...
Digital technology keeps falling prey to the ease with which the unauthorized reproduction and distribution of digital objects can be achieved. Research on copyright protection of digital data must counterbalance the failures of legal measures against digital piracy. Digital watermarking tops the list of technical countermeasures and recent research has focused on proposing watermarking methods for...
Digital Image Security is still or recent topic of research in computer science engineering. Images are sharing very frequently from one device to another device. Due to this functionality and features it is very complicated situation for all of the application users because users share their personal images publically. A very unsolvable problem is still there is no appropriate method for image security...
This paper examines means to achieve e-government documents security through the use of digital watermarking techniques. An effective algorithm is proposed such that a given e-government document is watermarked in the frequency domain by applying a second order Discrete Wavelet Transformation (DWT) followed by transformation of the document through matrix decomposition techniques such the Singular...
Nowadays consumers of worldwide can capture digital image and video scene using several multimedia devices such as smartphones, tablets and cameras. Thus, the data captured may be easily copied or transmitted without any control and as consequence the intellectual property of the owner can be infringed, causing economic or moral damages. This fact suggests the necessity to develop security tools such...
Invisible digital watermarking is coming to be the most popular technology to protect digital copyright of multimedia data. Schemes based on Discrete Cosine Transform (DCT) are widely used in image or video digital watermarking. In this paper, we proposed a new method that simplify the previous DCT-based methods while more robust to common attacks than conventional methods. We get rid of traditional...
In today's world of digital communication, as technology progresses, there is more and more attention required on image security. Many visual cryptography algorithms have been suggested and digital watermarking in association with visual cryptography is also proposed for more image security. An image watermarking model based on progressive visual cryptography is proposed to decide optimal number of...
In this modern era, storing and transmitting information is by far done as a digital object. But the greatest disadvantage in digital data transmission is the fact that innumerable copies of the digital file can be made and is susceptible to be misused. This leads to the worldwide problem of copyright protection, copy protection and content authentication. Various Steganographic techniques and algorithms...
A 3D model watermarking against affine transformation is proposed in this paper. Firstly, the original watermark is embedded in an image, then we compare the watermarked image with the original watermark image and embed the watermark information into three-dimensional mesh model with distance between vertices and the center of a model. The algorithm has strong robustness against attacks, such as scaling,...
The robustness and invisibility is the most important evaluating indicator of digital watermarking system. Besides, the data that must be analyzed and calculated is large for the video watermark. Thus, for the video watermark, watermarking algorithm should not only have strong robustness but also have low time complexity. In this paper, we put forward the idea to implement a frequency domain digital...
At present, due to advancement in communication technology and internet, people are sharing images over social networking and other sites very efficiently but it has created problems regarding copyright protection and authentication of the images. In past 10–15 years, digital watermarking has been becoming a popular solution for these problems. Besides of being popular, it creates distortions in host...
As accessing medical images through web anywhere at any time is in demand, it is essential requirement to interpret and analyze the medical images accurately. The purpose of this paper is to present, digital watermarking technique for modern medical approaches with multiple objective optimization using Firefly algorithm in Discrete Wavelet Transform and Singular Value Decomposition domain with good...
With the growth in digital world, it is becoming more important to find a method to protect the security of digital media. An image watermarking model based on progressive visual cryptography is proposed to decide optimal number of shares. A study on implementation of meaningful shares in combination with visual cryptography scheme for secret images is carried out for implementation of algorithm....
Web resources protection is one of the most difficult problems on network. Many solutions relevant have been put forward and some protecting systems have come out until now. However, almost all solutions are based on the method that compares with files' digital signature firstly and judges files have been tampered with or not secondly [1]. And all these solutions are useless for resolving misusing...
Digital domain is today's most preferred area for data processing and transmission. In case of data augmentation or authorized replication, copyright protection has become an exigent challenge. Digital watermarking is a conventional procedure to serve this purpose. Here a spatial domain image watermarking scheme is developed through a pixel based saliency map where the inadequate nature of human visual...
Due to the advancement of digital media, data authentication and security has become a major issue. Digital watermarking comes as a solution to it. This paper gives comparative study of digital watermarking technology based on DWT and SVD on various color spaces. The same technique is applied on various color spaces like RGB, YUV and YCbCr in case of color image. The quality of watermarked image is...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.