What are the types of digital watermarking?

Digital Watermarking and its Types

• Visible Watermarks – These watermarks are visible.
• Invisible Watermarks – These watermarks are embedded in the media and use steganography technique.
• Public Watermarks – These can be understood and modified by anyone using certain algorithms.
• Fragile Watermarks –

How many types of watermarks are there?

Speaking of digital image watermarking, we can divide watermarks into two main groups – visible and invisible watermarks. A visible watermark is a visible semi-transparent text or image overlaid on the original image.

What is blind watermarking technique?

It is a blind watermarking method, which means the original image as well as the original watermark are not required at the time of extraction. The proposed algorithm has used the gray image for embedding a pre-defined watermark into an image and a binary logo image such as the watermark.

What is watermarking technology?

1 Digital Watermarking. Digital watermarking is a technology in which identification information is embedded into the data carrier in ways that cannot be easily noticed, and in which the data usage will not be affected. This technology often protects copyright of multimedia data, and protects databases and text files.

What is the difference between watermarking and steganography?

Steganography is used for secret communication, whereas Watermarking is used for content protection, copyright management, content authentication and tamper detection.

What is digital watermarking in image processing?

Digital image watermarking is a technique in which watermark data is embedded into a multimedia product and, later, is extracted from or detected in the watermarked product. These methods ensure tamper-resistance, authentication, content verification, and integration of the image [1].

What is digital watermarking explain the whole watermarking process?

Digital watermarking is the process of embedding a digital code (watermark) into a digital content like image, audio, or video. The embedded information, sometimes called a watermark, is dependent on the security requirements mentioned above.

What is non blind watermarking?

Nonblind watermarking requires the original image to detect the watermark. A blind technique does not require the original image to detect watermark. Semiblind watermarking technique requires the key and the watermarked document for detection.

What is the difference between cryptography and watermarking?

Steganography involves hiding the intended message within a seemingly harmless message whereas cryptography involves coding the message using an encryption key and sending it as cipher text. In steganography, information is just hidden while in watermarking it hidden and protected.

What is the difference between cryptography steganography and digital watermarking?

The main difference between Watermarking and Steganography is that watermarking is used for holding copyrights for their work both in the images and in the text. Steganography is used for hiding information in the form of secret communication. Having watermarks will be good for promoting your brand.

What are the different types of watermark attacks?

Watermark attacks, classified into four main groups: • Simple attacks are conceptually simple attacks that attempt to damage the embedded watermark by modifications of the whole image without any effort to identify and isolate the watermark. Examples include frequency based compression, addition of noise, cropping and correction.

How can watermarks be destroyed by manipulation?

These watermarks are destroyed by data manipulation. There must be a system which can detect all changes in the data if fragile watermarks are to be used. The information needs be embedded in the media. The signal which is embedded is the host signal and the information is called digital watermark.

What is digital watermarking system?

Fig. 1 Basic Digital Watermarking system The watermark technique can be divided into two sections, visible watermarking and invisible watermarking. The main advantage of the visible watermark is that the watermark can be seen by eyes without extracting but its shortcoming is that watermark would destroy the presentation of media.

What is a watermark removal attack?

• Removal attacks attempt to analyse or estimate (from more differently watermarked copies) the watermark, separate it out and discard only the watermark. Examples are collusion attack, denoising or exploiting conceptual cryptographic weakness of the watermark scheme (e.g. knowledge of positions of single watermark elements).