A Joint DWT-DCT Based Robust Digital Watermarking Algorithm for Ownership Verification of Digital Images

2011 ◽  
pp. 482-491 ◽  
Author(s):  
R. H. Laskar ◽  
Madhuchanda Choudhury ◽  
Krishna Chakraborty ◽  
Shoubhik Chakraborty
Keyword(s):  
Digital Watermarking ◽  
Digital Images ◽  
Ownership Verification

Two Spatial Watermarking Techniques for Digital Images

2013 ◽  
pp. 691-712
Author(s):  
Dumitru Dan Burdescu ◽  
Liana Stanescu ◽  
Marian Cristian Mihaescu
Keyword(s):  
Digital Watermarking ◽  
Copyright Protection ◽  
Digital Images ◽  
Multimedia Data ◽  
Effective Measure ◽  
Digital Multimedia ◽  
Black And White ◽  
Robust Watermark ◽  
Multimedia Technologies ◽  
New Algorithms

The rapid growth of digital multimedia technologies brings tremendous attention to the field of digital authentication. Digital watermarking has become widely recognized as an effective measure for copyright protection of multimedia data. The owner or the distributor of the digital images can insert a unique watermark into copies for different customers or receivers, which will be helpful to identify the source of illegal copies. In this chapter the authors present two original spatial authentication techniques for digital images. These new algorithms yield an invisible watermark that is robust to various kinds of attacks. The main principle is the utilization of a virtual (2D or 3D) graph embedded into the digital images. Then, the colors of some vertices of the virtual graph are slightly modified for obtaining the watermark. The proposed techniques modify pixels or voxels of the object by a spatial watermark insertion scheme. These techniques can be used for all kinds of digital images, color or black and white, and the new algorithms produce an invisible robust watermark. The techniques lower the computational complexity that normally rises with the traditional watermarking algorithms. This approach reduces computation and implementation complexity of the algorithms. These techniques seem to replace advantages of the transform domain techniques with those of the spatial domain techniques.

scholarly journals Digital Watermarking using Multiscale Ridgelet Transform

2013 ◽  
pp. 162-167
Author(s):  
Manmit Kaur ◽  
H. P. Sinha
Keyword(s):  
Wavelet Transform ◽  
Image Compression ◽  
Edge Detection ◽  
Discrete Cosine Transform ◽  
Digital Watermarking ◽  
High Frequency ◽  
Digital Images ◽  
Experimental Results ◽  
Ridgelet Transform ◽  
Frequency Bands

The multi-resolution watermarking method for digital images proposed in this work. The multiscale ridgelet coefficients of low and high frequency bands of the watermark is embedded to the most significant coefficients at low and high frequency bands of the multiscale ridgelet of an host image, respectively. A multi-resolution nature of multiscale ridgelet transform is exploiting in the process of edge detection. Experimental results of the proposed watermarking method are compared with the previously available watermarking algorithm wavelet transform. Moreover, the proposed watermarking method also tested on images attached by Discrete Cosine Transform (DCT) and wavelet based lossy image compression techniques.

scholarly journals PENERAPAN DIGITAL WATERMARK SEBAGAI VALIDASI KEABSAHAN GAMBAR DIGITAL DENGAN SKEMA BLIND WATERMARK

2017 ◽  
Vol 3 (2) ◽  
Author(s):  
Adi Suheryadi
Keyword(s):  
Digital Watermarking ◽  
Digital Image ◽  
Large Scale ◽  
Digital Images ◽  
Technological Development ◽  
Mean Value ◽  
Secret Key ◽  
Legal Cases ◽  
News Reporting ◽  
Digital Era

Digital watermarking is an important field of technological development that has now grown in the digital era. Digital era encourage the spread digital images on internet by the websites with a large scale. On the other hand, digital images are objects that are very easy to change or manipulate, and even copied irresponsibly. Meanwhile it is very difficult to prove the image has been changed by existing equipment at this time, and it is difficult to prove its ownership. This is an important issue, when the image is one of the evidences for legal cases, news reporting and medical filing, where the image must be ensured that the digital image is not subject to change or manipulation. In this paper, we present the application of digital watermarking to authentication and ownership validation of digital image so the image can be ascertained its validity. This research applies blind watermark scheme by using secret key that inserted at least-significant bits (LSB) of host image therefore the watermark is invisible watermark. The result of watermarked image has a small decrease in quality with the mean value of PSNR and MSE about 34.08 and 14.62.

A New Public-Key Algorithm for Watermarking of Digital Images

2011 ◽  
pp. 87-100
Author(s):  
Eberhard Stickel
Keyword(s):  
Digital Watermarking ◽  
Financial Institutions ◽  
Digital Images ◽  
Digital Signatures ◽  
Public Key ◽  
Two Dimensional ◽  
New Public ◽  
Surveillance Cameras ◽  
Automatic Teller Machines

Conventional photographs may easily be used in court as evidence. The complete negative may be inspected. Subsequent numbers are a reliable proof that sequences of pictures have been generated. Modifications are usually quickly detected without major technical efforts. This is not true anymore for digital images, since they may easily be manipulated. This poses a problem, for example, for surveillance cameras of automatic teller machines in financial institutions. Digital watermarking techniques have been proposed to address this problem. In this chapter, a new public-key watermarking system will be presented. In contrast to digital signatures and other public-key watermarking techniques, it is two-dimensional and, hence, especially well-suited for applications involving digital images.

Security in Digital Images

2015 ◽  
pp. 381-394
Author(s):  
Mohammed A. Otair
Keyword(s):  
Intellectual Property ◽  
Image Encryption ◽  
Intellectual Property Rights ◽  
Digital Watermarking ◽  
Digital Images ◽  
Image Steganography ◽  
The Internet ◽  
Digital Multimedia ◽  
Security Levels ◽  
Illegal Copying

Due to the swift growth of the using of the digital multimedia in the internet these days, the security in digital images has become a very important issue. Lately, significant attentions are given by many researchers in the field of the security for digital images, and several image encryption techniques have been developed to improve the security levels of these images. Different techniques can be applied to protect intellectual property rights for digital images and prohibit illegal copying. The aim of this chapter is to introduce the most important techniques that have been developed to implement the security in digital images such as digital watermarking and image steganography.

scholarly journals A DWT-SVD based Robust Digital Watermarking for Digital Images

2018 ◽  
Vol 132 ◽  
pp. 1441-1448 ◽  
Author(s):  
Poonam ◽  
Shaifali M. Arora
Keyword(s):  
Digital Watermarking ◽  
Digital Images

Research on the Zero-Bit Watermarking Algorithms Based on the Matrix Decomposition for Digital Images

2015 ◽  
Vol 738-739 ◽  
pp. 674-677
Author(s):  
Li Jun Fan
Keyword(s):  
Digital Watermarking ◽  
Digital Images ◽  
Matrix Decomposition ◽  
Special Technique ◽  
Remote Sensing Images ◽  
The Matrix ◽  
The Many ◽  
Tracking Object ◽  
Reversible Digital Watermarking ◽  
The Military

Due to the problem that the many digital images can be modified more and more easily, watermarking algorithms are proposed. There are many types of digital watermarking algorithms, such as robust digital watermarking algorithms, watermarking schemes for authentication, and reversible digital watermarking algorithms. However, there are some special images, such as the digital medical images for remote treatment, the military images for tracking object, and the remote sensing images, and they are so sensitive to any modification that we should authenticate the copyright by special technique. And this technique is zero-bit watermarking algorithms. In this paper, about zero-bit watermarking algorithms are surveyed. The basic procedures of these classical algorithms are analyzed, and some suggestion about the zero-bit algorithms is given.

Two Spatial Watermarking Techniques for Digital Images

2010 ◽  
pp. 1-20
Author(s):  
Dumitru Dan Burdescu ◽  
Liana Stanescu ◽  
Marian Cristian Mihaescu
Keyword(s):  
Digital Watermarking ◽  
Copyright Protection ◽  
Digital Images ◽  
Multimedia Data ◽  
Effective Measure ◽  
Digital Multimedia ◽  
Black And White ◽  
Robust Watermark ◽  
Multimedia Technologies ◽  
New Algorithms

The rapid growth of digital multimedia technologies brings tremendous attention to the field of digital authentication. Digital watermarking has become widely recognized as an effective measure for copyright protection of multimedia data. The owner or the distributor of the digital images can insert a unique watermark into copies for different customers or receivers, which will be helpful to identify the source of illegal copies. In this chapter the authors present two original spatial authentication techniques for digital images. These new algorithms yield an invisible watermark that is robust to various kinds of attacks. The main principle is the utilization of a virtual (2D or 3D) graph embedded into the digital images. Then, the colors of some vertices of the virtual graph are slightly modified for obtaining the watermark. The proposed techniques modify pixels or voxels of the object by a spatial watermark insertion scheme. These techniques can be used for all kinds of digital images, color or black and white, and the new algorithms produce an invisible robust watermark. The techniques lower the computational complexity that normally rises with the traditional watermarking algorithms. This approach reduces computation and implementation complexity of the algorithms. These techniques seem to replace advantages of the transform domain techniques with those of the spatial domain techniques.

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