Digital watermarking of still images with gray-level digital watermarks

2000 ◽  
Vol 46 (1) ◽  
pp. 137-145 ◽  
Author(s):  
Xia-Mu Niu ◽  
Zhe-Ming Lu ◽  
Sheng-He Sun
Keyword(s):  
Digital Watermarking ◽  
Gray Level ◽  
Still Images ◽  
Digital Watermarks

Digital watermarking of still images with color digital watermarks

2009 ◽  
Author(s):  
Abdul R. Zubair ◽  
Olasebikan A. Fakolujo ◽  
Periasamy K. Rajan
Keyword(s):  
Digital Watermarking ◽  
Still Images ◽  
Digital Watermarks

scholarly journals Security in CAI Materials by Embedding Digital Watermarks

10.28945/2626 ◽  
2003 ◽  
Author(s):  
Supot Nitsuwat ◽  
J. Srisomphun
Keyword(s):  
Digital Watermarking ◽  
Copyright Protection ◽  
Experimental Results ◽  
Still Images ◽  
Secret Information ◽  
Course Materials ◽  
Robust Techniques ◽  
Computer Based ◽  
Digital Watermarks ◽  
Based Instruction

Computer-based instruction assistance (CAI) plays very important role in e-leaming system. Distancelearning students can remotely access this kind of course materials. However, being an electronic form has created a growing need to protect them against illegal manipulation and duplication. Therefore, the more robust techniques are needed. Digital watermarking has been proposed as a solution to the problem of copyright protection of multimedia for many decades. This technique can also be applied to the educational frameworks. In this paper, before the CAI will be distributed, double watermarks have been embedded into all still images in the CAI materials. Firstly, the visible watermark, e.g., university’s logo, is inserted directly on image pixel’s intensity to exhibit an ownership of the CAI. The fragile invisible watermark is then embedded again on these watermarked images. Because of the special characteristic of the latter if there is any attempt to change or remove the visible logo, it can be clearly detected. We also proposed the extracting method to reveal secret information using for verifying our right on the materials. The experiments using different kinds of attacks on the materials are also conducted. Finally, the discussion of the experimental results and conclusion of the paper are also given.

Digital Watermarking and Steganography

2009 ◽  
pp. 402-409
Author(s):  
Kuanchin Chen
Keyword(s):  
Digital Watermarking ◽  
Copyright Protection ◽  
Video Recording ◽  
The Internet ◽  
Careful Planning ◽  
Digital Format ◽  
The Media ◽  
Digital Watermarks ◽  
Printed Materials

Sharing, disseminating, and presenting data in digital format is not just a fad, but it is becoming part of our life. Without careful planning, digitized resources could easily be misused, especially those that are shared across the Internet. Examples of such misuse include use without the owner’s permission, and modification of a digitized resource to fake ownership. One way to prevent such behaviors is to employ some form of copyright protection technique, such as digital watermarks. Digital watermarks refer to the data embedded into a digital source (e.g., images, text, audio, or video recording). They are similar to watermarks in printed materials as a message inserted into the host media typically becomes an integral part of the media. Apart from traditional watermarks in printed forms, digital watermarks may also be invisible, may be in the forms other than graphics, and may be digitally removed.

An Introduction in Digital Watermarking

2011 ◽  
pp. 117-141
Author(s):  
Tino Jahnke ◽  
Juergen Seitz
Keyword(s):  
Digital Watermarking ◽  
Digital Signal ◽  
Digital Products ◽  
Noise Pattern ◽  
Source Data ◽  
The World ◽  
Protection Mechanisms ◽  
Digital Watermarks ◽  
Pseudo Noise ◽  
Application Specific

In order to solve intellectual property problems of the digital age, two basic procedures are used: “Buy and drop,” linked to the destruction of various peer-to-peer solutions and “subpoena and fear,” as the creation of non-natural social fear by specific legislations. Although customers around the world are willing to buy digital products over networks, the industry is still using conventional procedures to push such a decisive customer impulse back into existing and conventional markets. Digital watermarking is described as a possibility to interface and close the gap between copyright and digital distribution. It is based on steganographic techniques and enables useful right protection mechanisms. Digital watermarks are mostly inserted as a plain bit sample or a transformed digital signal into the source data using a key based embedding algorithm and a pseudo-noise pattern. The embedded information is hidden in low-value bits or least significant bits of picture pixels, frequency or other value domains, and linked inseparably with the source of the data structure. For the optimal application of watermarking technology a trade-off has to be made between competing criteria like robustness, non-perceptibility, non-delectability, and security. Most watermarking algorithms are resistant against selected and application-specific attacks. Therefore, even friendly attacks in the form of usual file and data modifications can destroy easily the watermark or falsify it. This chapter gives an overview in watermarking technologies, classification, methodology, applications and problems.

Information Hiding, Digital Watermarking and Steganography

2011 ◽  
pp. 382-389
Author(s):  
Kuanchin Chen
Keyword(s):  
Digital Watermarking ◽  
Information Hiding ◽  
Information Dissemination ◽  
The Internet ◽  
Digital Representation ◽  
Careful Planning ◽  
Authentication Mechanism ◽  
Digital Watermarks

Digital representation of data is becoming popular as technology improves our ways of information dissemination, sharing and presentation. Without careful planning, digitized resources could easily be misused, especially those distributed broadly over the Internet. Examples of such misuse include use without owner’s permission and modification of a digitized resource to fake ownership. One way to prevent such behaviors is to employ some form of authentication mechanism, such as digital watermarks.

An Introduction in Digital Watermarking

2008 ◽  
pp. 554-569 ◽  
Author(s):  
Tino Jahnke ◽  
Juergen Seitz
Keyword(s):  
Digital Watermarking ◽  
Digital Signal ◽  
Digital Products ◽  
Noise Pattern ◽  
Source Data ◽  
The World ◽  
Protection Mechanisms ◽  
Digital Watermarks ◽  
Pseudo Noise ◽  
Application Specific

In order to solve intellectual property problems of the digital age, two basic procedures are used: “Buy and drop,” linked to the destruction of various peer-to-peer solutions and “subpoena and fear,” as the creation of non-natural social fear by specific legislations. Although customers around the world are willing to buy digital products over networks, the industry is still using conventional procedures to push such a decisive customer impulse back into existing and conventional markets. Digital watermarking is described as a possibility to interface and close the gap between copyright and digital distribution. It is based on steganographic techniques and enables useful right protection mechanisms. Digital watermarks are mostly inserted as a plain bit sample or a transformed digital signal into the source data using a key based embedding algorithm and a pseudo-noise pattern. The embedded information is hidden in low-value bits or least significant bits of picture pixels, frequency or other value domains, and linked inseparably with the source of the data structure. For the optimal application of watermarking technology a trade-off has to be made between competing criteria like robustness, non-perceptibility, non-delectability, and security. Most watermarking algorithms are resistant against selected and application-specific attacks. Therefore, even friendly attacks in the form of usual file and data modifications can destroy easily the watermark or falsify it. This chapter gives an overview in watermarking technologies, classification, methodology, applications and problems.

scholarly journals A Study on Digital Watermarking Techniques

2018 ◽  
Vol 4 (3) ◽  
pp. 5
Author(s):  
Garima Bhargava ◽  
Arun Jhapate
Keyword(s):  
Digital Watermarking ◽  
Copyright Protection ◽  
Information Hiding ◽  
Image Watermarking ◽  
Multimedia Systems ◽  
Research Interest ◽  
Transform Domain ◽  
Still Images ◽  
Audio Video ◽  
Networked Multimedia

Digital watermarking was introduced as a result of rapid advancement of networked multimedia systems. It had been developed to enforce copyright technologies for cover of copyright possession. This technology is first used for still images however recently they need been developed for different multimedia objects like audio, video etc. Watermarking, that belong to the information hiding field, has seen plenty of research interest. There's a lot of work begin conducted in numerous branches in this field. The image watermarking techniques might divide on the idea of domain like spatial domain or transform domain or on the basis of wavelets. The copyright protection, capacity, security, strength etc are a number of the necessary factors that are taken in account whereas the watermarking system is intended. This paper aims to produce a detailed survey of all watermarking techniques specially focuses on image watermarking types and its applications in today’s world.

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